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<article xmlns:xlink="http://www.w3.org/1999/xlink">
  <front>
    <journal-meta />
    <article-meta>
      <title-group>
        <article-title>Fuzzy modelling of Big Data of HR in the conditions of Industry 4.0</article-title>
      </title-group>
      <contrib-group>
        <aff id="aff0">
          <label>0</label>
          <institution>State University of Economics and Technology</institution>
          ,
          <addr-line>5 Stepana Tilhy Str., Kryvyi Rih, 50006</addr-line>
          ,
          <country country="UA">Ukraine</country>
        </aff>
        <aff id="aff1">
          <label>1</label>
          <institution>Zaporizhzhia National University</institution>
          ,
          <addr-line>66 Zhukovsky Str., Zaporizhzhia, 69063</addr-line>
          ,
          <country country="UA">Ukraine</country>
        </aff>
      </contrib-group>
      <pub-date>
        <year>1908</year>
      </pub-date>
      <fpage>0000</fpage>
      <lpage>0002</lpage>
      <abstract>
        <p>In this article, a systematic methodology for analyzing and assessing the effectiveness of human resources based on fuzzy sets using big data technologies is used. Based on our research, we analyzed the big data construction method for our chosen approach using Industry 4.0. For the selected fuzzy sets, a set of sequence of procedures in the sequence of the method for assessing the effectiveness of human resources have been identified. Input and output membership functions for data mining have been developed. This article discusses process of building rules of fuzzy logic that allowed us to determine the degree of truth for each condition. The relevance achieved through the development of a methodology that includes eight procedures required for a comprehensive assessment of the economic efficiency of human resources. In this article, an approach to assessing the normative or average values of the performance of official duties by employees of an enterprise in many specialties, educational levels, levels of management, as well as taking into account the description of many positions, descriptions of compliance and interchangeability of positions, assessment of additional characteristics of employees and a description of many additional tasks and their characteristics is presented. The article presents a structural data-mining model for personnel assessment. The results of modeling the assessment of human resources is presented.</p>
      </abstract>
      <kwd-group>
        <kwd>human resources</kwd>
        <kwd>Big Data</kwd>
        <kwd>Industry 4</kwd>
        <kwd>0</kwd>
        <kwd>data-mining model</kwd>
        <kwd>fuzzy modelling</kwd>
      </kwd-group>
    </article-meta>
  </front>
  <body>
    <sec id="sec-1">
      <title>-</title>
      <p>Today business is forced to solve a whole range of complex and unique tasks. To solve
such problems as the tasks of increasing and stabilizing the development of economic
objects in modern conditions of economic activity, new approaches are required, which
___________________
Copyright © 2020 for this paper by its authors. Use permitted under Creative Commons License
Attribution 4.0 International (CC BY 4.0).
determined the emergence of a new concept by the German economist Klaus Schwab,
President of the World Economic Forum in Davos [21]. According to this concept, it is
argued that we live in the era of the fourth industrial revolution, when the virtual world
is combined with the physical world using information technology. The fourth
industrial revolution is characterized by a change in economic relations and the
widespread use of intelligent technologies (cloud technologies [13], big data [12],
artificial neural networks and fuzzy sets [23], data mining [7], and others). These
technologies form the backbone of the digital economy.</p>
      <p>Therefore, for the successful development of states, regions, enterprises in the era of
the fourth industrial revolution (Industry 4.0), an assessment of the possible potential
efficiency of human resources (HR) plays an important role, since HR can radically
change and increase the development and competitiveness of business entities in
modern conditions.</p>
      <p>In addition, the global COVID-19 pandemic has forced countries to rethink their
national concepts of economic development [22].</p>
      <p>It should be said that the term Industry 4.0 is relatively new, which is applied to the
concept of the fourth industrial revolution and covers a wide range of modern
technologies and approaches, mainly related to the digital economy. In terms of modern
technologies, Industry 4.0 is associated with the application and intelligent processing
of data in the following areas: artificial neural systems, industrial Internet, cloud
solutions and decentralized services, as well as processing and mining of large amounts
of data. The works of Klaus-Dieter Thoben, Stefan Wiesner and Thorsten Wuest [27],
Robert Lawrence Wichmann, Boris Eisenbart and Kilian Gericke [28] are devoted to
these studies on the technology of processing big data in real time. According to the
application of the approaches and technologies of using Industry 4.0, they can be
divided into the following areas: Big Data storage, data mining and the use of artificial
neural systems and fuzzy sets. As for the use of big data, first of all, one can highlight
the cloud platforms Amazon Web Services (AWS), Google Cloud Platform,
Microsoft’s Azure and others. These decisions influenced the formation of cloud
computing concepts discussed in the work of S. O. Kuyoro, F. Ibikunle and A. Oludele
[14], as well as in the work on data mining and machine learning by Ian H. Witten and
Elbe Frank [29] and others [11; 18].</p>
      <p>The first direction is determined by the level of application of cloud computing. High
information technologies are sweeping the world and are replacing classical methods
of analysis with HR processes. Nowadays, robotic programs are being used that offer
employees of the enterprise to pass an express interview or interview using expert
systems, which are still in use.</p>
      <p>The next direction is based on the application of data mining in relation to their
historical layers.</p>
      <p>This analysis and assessment of HR allows you to select employees who are capable
of solving modern problems. Now new specialists under 25 are entering the labour
market, who have completely different knowledge, interests and fundamentally
different ideas about modern work. Young specialists are able to quickly make
management decisions and promote new projects, thereby increasing the level of work
at the enterprise.</p>
      <p>Beyond these areas, it should be noted that for a long time HR management has been
focused on standardization and versatility. However, today this approach is gradually
becoming obsolete. This approach is being replaced by methods of personnel
management focused on the maximum use of the intellectual capital of employees. This
is stimulated by the simultaneous satisfaction of individual needs, desires and
capabilities of employees and their synchronization with the tasks of the enterprise.
Modern HR specialists are beginning to more closely monitor the development of
employees in the region and within the enterprise, which allows flexible management
of career growth, which can be adjusted taking into account the proposals of the
employees themselves.
2</p>
    </sec>
    <sec id="sec-2">
      <title>Research motivation and formal problem statement</title>
      <p>In this section, we provide our motivation for this work and provide an analytical
overview of the research questions used to develop a method for analytically assessing
human resources.
2.1</p>
      <sec id="sec-2-1">
        <title>Research motivation</title>
        <p>Our main motivation for this research work is to bridge the gap between regional,
production development scenarios, taking into account the assessment of the economic
efficiency of human resources using big data. We are confident that this work will serve
as a basis for developers of use cases for Industry 4.0, so that in the management
process, more informed decisions can be made when choosing a strategy for the
development of regions and enterprises.</p>
        <p>In the course of the recent work of Mykola Ivanov, Nataliia Maksyshko, Sergey
Ivanov and Nataliia Terentieva [10], we realized that there is a great need to develop a
method for representing big data HR. It is also necessary to develop a methodology for
analyzing and assessing the economic efficiency of personnel based on big data for the
development of a region or enterprise.</p>
        <p>Thus, this study makes it possible to carry out strategic planning for the development
of a region or an enterprise, taking into account the intellectual assessment of the
economic efficiency of personnel.
2.2</p>
      </sec>
      <sec id="sec-2-2">
        <title>Literature review</title>
        <p>Ensuring compliance with the modern requirements of Industry 4.0 and available
technologies for using various technologies for processing Big Data is based on the use
of previously developed directions.</p>
        <p>The first direction is determined by the level of application of intelligent systems.
High information technologies are sweeping the world and replacing the classical
methods of managing HR processes. Nowadays, robotic programs are being used that
offer employees of the enterprise to pass an express interview or interview using expert
systems, which are still in use.</p>
        <p>The next direction is intellectual analysis and assessment of the economic efficiency
of human resources capable of learning and solving modern problems.</p>
        <p>In addition to these areas, one should also take into account modern methods of
personnel management, focused on the maximum use of the intellectual capital of
employees. This is stimulated by the simultaneous satisfaction of individual needs,
desires, and capabilities of employees and their synchronization with the tasks of the
enterprise. Modern HR specialists are beginning to more closely monitor the
development of employees within the enterprise, which allows flexible management of
career growth, which can be adjusted taking into account the proposals of the
employees themselves.</p>
        <p>Personnel strategy is part of the overall strategy for the development of enterprises
and long-term planning, and their business activities. An important role in these plans
is played by the assessment of the degree of personnel efficiency as a factor in the
renewal and increase in production efficiency in the general economic strategy of the
enterprise. Building and managing modern employee data directories requires
processing a lot of information. This is due to a wide range of organizational, economic,
technical and technological problems solved by the personnel. Therefore, data analysis
in HR process management is an urgent task.</p>
        <p>However, the problems of rating management have not yet been resolved. The
solution to the problem of rating management was the work of Iurii H. Lysenko,
Volodymyr L. Petrenko, Oleh I. Bohatov and Volodymyr H. Skobeliev [16]. However,
the level of personnel development and their assessment were not taken into account.
This work was devoted to the solution of this problem, in which the theoretical aspects
of personnel development are studied, in particular the concept, main tasks and
directions of personnel development at the enterprise. V. M. Helman, Ye. V. Makazan
and A. M. Buriak [6] considers the development of enterprise personnel as a change in
its qualitative characteristics, in which indicators are offered in the form of a degree of
activity.</p>
        <p>Human resource management as a strategic human resource management is to-day
considered as going beyond such management tasks as motivation, the level of
remuneration. Instead, managers should view human resource management as a process
that contributes to the success of the enterprise. Therefore, in the work of Brian E.
Becker and Mark A. Huselid [1] approaches are considered in which all managers
should be involved in the management process, where the role of employees is
important for the competitive advantage of the enterprise. In addition, the authors, when
solving these problems, considered the issues when the company develops and
motivates the development of human capital. They also identified the requirements for
businesses that value a skilled workforce and are more profitable than those that do not
value this workforce.</p>
        <p>The results of the work of scientists Mark A. Huselid [8], Jeffrey Pfeffer and John
F. Veiga [20] show that successful enterprises have several characteristics in com-mon:
stable job security, high levels of self-government and excellent wages. The most
successful businesses manage people as a strategic asset and measure the performance
of people in terms of their influence on the manufacturing process. Ibraiz Tarique,
Dennis Briscoe and Randall S. Schuler in the work [26] writes about a situation when
each employee of an enterprise effectively performs his duties and builds a highly
efficient work system in which the employee bears maximum involvement and
responsibility.</p>
        <p>In modern enterprises, balancing the need to coordinate and synchronize HR across
cities and around the world is an important challenge, as discussed in [25]. Achieving
this balance is becoming increasingly difficult due to the level of functional diversity
that states, regions and enterprises strive for in the era of Industry 4.0. Approaches to
assessing the performance indicators of personnel in the context of the development of
the digital economy are considered in the work of Mykola Ivanov, Sergey Ivanov,
Nataliia Terentieva, Victoria Maltiz and Julia Kalyuzhnaya [9].</p>
        <p>The use of big data in human resource management has been reviewed by Peter
O’Donovan, Colm Gallagher, Kevin Leahy, Dominic T. J. O’Sullivan [19] and
Alessandra Caggiano [2].</p>
        <p>Along with these studies, not enough attention is paid to the problems of fuzzy
modeling of big data of human resources in the conditions of Industry 4.0, which makes
this problem very relevant today.
2.3</p>
      </sec>
      <sec id="sec-2-3">
        <title>Formal problem statement</title>
        <p>In the Industry 4.0 strategy, human resources are part of the overall development
strategy of the state, region and enterprise, and allow them to ensure the current
planning of economic activities. An important role in these plans is played by the
assessment of the degree of efficiency of human resources as a factor of renewal and
increase in production efficiency in the general economic strategy of the region and the
enterprise. The creation of modern Big Data about the population, employees and their
management requires processing a large amount of information using intelligent
assessment using fuzzy logic. This is due to a wide range of tasks solved by the
personnel, both organizational, economic and technological. Therefore, fuzzy modeling
of big data of human resources in the conditions of Industry 4.0 is an urgent task.
2.4</p>
      </sec>
      <sec id="sec-2-4">
        <title>Purpose of the article</title>
        <p>The article is devoted to intellectual analysis and assessment of the effectiveness of
human resources in the context of Industry 4.0. In addition, our goal was to reveal new
knowledge based on the application of fuzzy set theory with the possibility of using Big
Data.
3
3.1</p>
      </sec>
    </sec>
    <sec id="sec-3">
      <title>The theory of fuzzy modeling of HR</title>
      <sec id="sec-3-1">
        <title>Big Data architecture and analysis theory</title>
        <p>Modern construction and architecture of Big Data allows not only storing, but also
processing and analyzing data that is too large or too complex for traditional database
management systems.</p>
        <p>In Industry 4.0, according to research [28], they are required by using a strategic
change management approach that gives them a broader approach to leverage the
benefits of analytic processing.</p>
        <p>Big Data offers tremendous opportunities to revolutionize human resource
management.</p>
        <p>Managing human resources with cloud-based solutions opens up new opportunities
and solutions.</p>
        <p>These solutions include a new level of accessibility that facilitates greater employee
mobility. The ability to effectively apply data mining tools and decision-making
systems. Great opportunities, flexibility and constant updating of Big Data contribute
to the development of theoretical and practical developments. The Big Data architecture
can be represented as follows (fig. 1).</p>
        <p>Today, the sources of Big Data for us are the Internet (social networks, websites and
other applications). Big Data transformation is based on Data Warehouse principles.
The Data Warehouse has a complex layered architecture called the Layered Scalable
Architecture (LSA). In the Big Data system, LSA performs the logical division of data
structures into several functional levels. Data is copied (saved) from level to level and
transformed at the same time, in order to eventually appear in the form of consistent
information. This information will be ready for further analysis.</p>
        <p>The key components of Big Data Analytics Applications are Data Mining and OLAP
(On-Line Analytical Processing) multivariate data analysis technology. OLAP is a key
component of traditional data warehouse organization. OLAP systems are, in one way
or another, based on a data storage and organization system.</p>
        <p>The development of alternative methods for searching and aggregating information
in sparse data hypercubes implies work in a number of directions. Among these areas,
one can single out the study of the data model and the formalization of methods for
assessing the density of the data hypercube, the study and development of effective
methods for accessing information in the data hypercube, the development of an
alternative method for aggregating the sparse data hypercube, the study of the
possibilities of using various methods of visualization of data hypercubes, and others.</p>
        <p>The standard description of a multidimensional data model is based on the following
concepts: Data Hypercube, Dimension, Memders, Cells, and Measure.</p>
        <p>A data hypercube contains one or more dimensions and is an ordered collection of
components. Each component is defined by one and only one set of measurement values
– labels. The component can contain a measure or be empty.</p>
        <p>A dimension is understood as a set of marks that form one of the faces of a
hypercube. An example of a time dimension is a time period: day, month, quarter, year.
An example of an economic dimension is a list of profitability indicators: working
capital, cost, etc.</p>
        <p>To gain access to the data, we need to specify one or more directions for choosing
the measurement values that correspond to the necessary components. The mechanism
for selecting measurement values is the fixation of marks, and the set of selected
measurement values is a set of fixed marks.</p>
        <p>
          The set of dimensions of a hypercube can be written in the following form
= {
= (
          <xref ref-type="bibr" rid="ref1 ref1 ref2 ref2 ref3">1,
2,
1,
2,
3</xref>
          )},
where 1 – is a generalized indicator of job compliance, characterizing the degree of
conformity of qualifications and work experience of the post, level of responsibility, as
well as the quality of the performance of current work and duties,
        </p>
        <p>2 – is a generalized indicator of diligence, characterizing the effectiveness of the
tasks (complexity, quality, timeliness),
1 – ambitiousness, a single indicator of personality characteristics,
1 – the quality of a leader, an indicator of personality characteristics,
3 – the level of attitude in the team, a single indicator of personality
characteristics.</p>
        <p>
          Then the set of measurement labels is written
(
          <xref ref-type="bibr" rid="ref1">1</xref>
          )
(
          <xref ref-type="bibr" rid="ref2">2</xref>
          )
(
          <xref ref-type="bibr" rid="ref3">3</xref>
          )
And the set of fixed dimensions
dimension of the hypercube
= {
= {
,
,
        </p>
        <p>, . . . ,
= { ,
, . . . ,
},
},
= 1, .</p>
        <p>= 1, .
, . . . ,
} and fixed labels of the fixed
The data hypercube will be denoted as the set of its cells ( , ), which corresponds
to the sets , . Then the subset of the data hypercube HR, will correspond to the set
of fixed values , and we will denote it as ( , ).</p>
        <p>A single set of measurement labels ⊂ corresponds to each component of the
data hypercube HR ℎ ∈ . If the HR data cell is empty (does not contain data), then
the set of dimensions of the hypercube ( , ) will be denoted by ( ).</p>
        <p>Consider data manipulation operations in a hypercube. We propose a method for
managing HR data that includes the following steps.</p>
        <p>Stage 1. Data Projection – Multiple Query (MDX).</p>
        <p>A subset of the multidimensional data cube ( , ) represents a query (Slice).
Stage 2. Building a multidimensional query.</p>
        <p>The construction of the query is carried out in order to obtain the necessary subset
of the components ⊂ and remove the values by sequentially fixing the labels. The
request is usually an HR dataset.</p>
        <p>The label ∈ defines the hyperplane of intersection of the data hypercube
corresponding to the dimension ∈ . The set of fixed labels ⊆ , thus, defines
the set of hyperplanes of sections of the data hypercube, corresponds to the set of fixed
dimensions ⊆ . The intersection of these hyperplanes determines the set of
components of queries of the data hypercube ( , ), which is needed by the
management level. The essence of the process of extracting data from a hypercube is
to construct a slice of the data hypercube ( , ) by specifying the sets , .</p>
        <p>Tearing out the label ∈ , corresponding to the measurement ∈ , we
determine what further interests us in the data hypercube. At each next step, the user
has access to labels corresponding to the set of unfixed measurements.</p>
        <p>Thus, by selecting a label in the dimensions ∈ and ∈ ′, we get a query to
the HR data hypercube in the form of a table or surface on a MATLAB plot.</p>
        <p>The essence of the process of adding money from the hypercube is stored in
prompting for the development</p>
        <p>Stage 3. Changing the order of presentation (visualization) of measurements.</p>
        <p>Changing the order in which measurements are presented is called Rotate. Rotation
provides the ability to visualize data in the most comfortable form for their perception.
In terms of the data model under consideration, rotation means changing the sequence
of fixing marks when building a slice. The result of rotation for a two-dimensional slice
(table) will be replacing columns with rows, and rows with columns.</p>
        <p>Stage 4. Convolution and detailing.</p>
        <p>Convolution and detailing are carried out due to the presence of a hierarchical
structure of dimensions. Measurement values (labels) can be grouped into hierarchies
consisting of one or more levels. For example, time labels are naturally combined in a
hierarchy with levels: year, quarter, month, day. The operations of convolution and
detailing do not fundamentally differ from the operation of building a slice of a data
hypercube, but they are distinguished to describe the work with aggregated data. The
presence of a hierarchical structure of dimensions allows for data aggregation.</p>
        <p>Stage 5. Aggregation of tributes.</p>
        <p>The number of aggregates stored in the data hypercube along with the primary data
depends on the number of labels corresponding to the levels of the hypercube
dimension hierarchy, starting with = 1, and can significantly exceed the amount of
primary data. The total number of aggregates in the case of two dimensions will be
determined by the sum of the values of the areas , , … , , which are shown in
fig. 2.</p>
        <p>Filling the HR hypercube with data with an insufficient amount of initial data leads
to the formation of empty components. Data hypercubes with many empty cells are
sparse.</p>
        <p>Thus, we have built a method for creating a visual representation of a
multidimensional database. This allowed us to assess the effectiveness of personnel
taking into account the filling of data hypercubes and to carry out a visual search for
information in the database.
3.2</p>
      </sec>
      <sec id="sec-3-2">
        <title>Human Resources fuzzy modeling method</title>
        <p>The task of fuzzy modeling and data mining when managing HR processes is to
efficiently extract and analyze the existing data array of employees with subsequent
management of personnel using cloud solutions. This will allow the rapid
implementation of a new personnel management system, obtaining a new level of
accessibility and increasing its mobility.</p>
        <p>The resulting performance indicators of personnel at the enterprise can be represented
in the form of multidimensional structures, where the corresponding indicators of the
enterprise management system represent each measurement. The following method of
modeling human resources is proposed, which is presented in fig. 3.
The proposed method includes four stages.
3.3</p>
      </sec>
      <sec id="sec-3-3">
        <title>Stage 1 Procedures</title>
        <p>
          The first stage solves the problem of choosing the analyzed indicators. For this, a lot of
ratings are determined (
          <xref ref-type="bibr" rid="ref1">1</xref>
          ).
3.4
        </p>
      </sec>
      <sec id="sec-3-4">
        <title>Stage 2 Procedures</title>
        <p>At the second stage, the initial information is determined, which is necessary for
calculating indicators based on expert assessments, analytical indicators (for example,
work experience, quality of work performed, and others).</p>
        <p>
          To describe the formalized set of sets of source information, we introduce the rules,
namely, if the set = { = (
          <xref ref-type="bibr" rid="ref1 ref2 ref3">1, 2, 3</xref>
          )}, is defined, then to use the value of the
component 2 of unit level 0, we will use the notation 2 (join operator).
        </p>
        <p>At the second stage, procedures are applied that allow:</p>
        <p>The first (I) procedure allows you to evaluate the regulatory or average value of the
performance of official duties by employees – 0:
0 = { 0 = (
01,
02)},
where 01 – normative or average value of the job performance of the -th employee,
02 – normative or average value of the level of assessment of the performance of
tasks of the -th employee.</p>
        <p>The second (II) procedure is aimed at identifying many specialties (economist,
programmer, builder and others) – :
= {
}, = 1,
,
where – is the r-th specialty,</p>
        <p>– is the number of specialties.</p>
        <p>The third procedure allows you to assess the level of education (secondary, bachelor,
master and others) – UO:
= {
= (
, },
= 1,
where – is the vector of characteristics of the v-th category,</p>
        <p>– category name,
– assessment of the level of education for the category in points,</p>
        <p>– is the number of categories.</p>
        <p>The fourth (IV) procedure is aimed at assessing the level of enterprise management
(higher, middle and lower level) – :
= {
= (
, )},
= 1,
where</p>
        <p>
          – is the vector of characteristics of the w-th level,
– level name,
,
,
(
          <xref ref-type="bibr" rid="ref4">4</xref>
          )
(
          <xref ref-type="bibr" rid="ref5">5</xref>
          )
(
          <xref ref-type="bibr" rid="ref6">6</xref>
          )
(
          <xref ref-type="bibr" rid="ref7">7</xref>
          )
= (
= {
, = 1,
        </p>
        <p>,
,
=
,
,
, ,
):
∈
,</p>
        <p>
          ∈
= (
, ):
∈
, 0 ≤
(
          <xref ref-type="bibr" rid="ref8">8</xref>
          )
(
          <xref ref-type="bibr" rid="ref9">9</xref>
          )
= 1 ,
(
          <xref ref-type="bibr" rid="ref10">10</xref>
          )
(
          <xref ref-type="bibr" rid="ref11">11</xref>
          )
(
          <xref ref-type="bibr" rid="ref12">12</xref>
          )
(
          <xref ref-type="bibr" rid="ref13">13</xref>
          )
(
          <xref ref-type="bibr" rid="ref14">14</xref>
          )
=
= (
          <xref ref-type="bibr" rid="ref1 ref2">1, 2,</xref>
          ): 1 ∈
≤ 1, ( 1 =
        </p>
        <p>2) ⇒
, 2 ∈
= 1,
,
,
, = 1,</p>
        <p>,
∈
},
= 1,</p>
        <p>– is the vector of characteristics of the i-th employee,
– the position held by the employee,
– many posts in which the employee previously worked and experience in them,
– vector of characteristics of work experience in previous positions,
– length of service (number of years) in the position d,
– value, reflects the education received by the i-th employee,
– specialty,
– level of education,</p>
        <p>– year of receipt of the qualification document (certificate, certificate, diploma
and others),
– the number of posts previously held by the i-th employee,
– the number of specialties in which the employee was educated by the i-th
employee.</p>
        <p>The eight (VIII) procedure allows you to describe many additional tasks (determined
by orders) and their characteristics in the enterprise:
= {
= ( 0, ,
,
), 0 ≤
At the third stage, the procedure for assessing the conformity of the specialty of the
position is performed. The function returns the value of the correspondence of the
specialty to the position :
(
The function returns the value of the coefficient of correspondence and
interchangeability of the specialty and the position :
(
) =</p>
        <p>
          , ∃ :
To determine job conformity is the level of education of the position held in conjunction
with work experience in similar or related positions:
(
          <xref ref-type="bibr" rid="ref19">19</xref>
          )
(
          <xref ref-type="bibr" rid="ref20">20</xref>
          )
(
          <xref ref-type="bibr" rid="ref21">21</xref>
          )
where – is the value of the current year,
11 – qualification level of education received,
12 – qualification level, which is determined by work experience,
13 – quality of job performance, determined by an expert.
        </p>
        <p>When solving the problem of data mining in the management of HR processes, fuzzy
logic methods are used to display the result on the interval [0; 1].
Therefore, at the fourth stage, the procedure for constructing membership functions
based on the theory of fuzzy sets is performed.</p>
        <p>The following “position”, “level”, “education” can be attributed to numerical
linguistic variables of employees, and “conflict”, “level of substitution” to linguistic
variables. Numerical linguistic variables and their meanings serve for a qualitative
description of a quantitative quantity. The values of linguistic variables are deter-mined
by experts.</p>
        <p>It should be noted that a linguistic variable, like its original term set, is associated
with a specific dimensional scale on which all arithmetic operations are defined.</p>
        <p>To assess the characteristics of employees in table 1, linguistic variables and their
dimensions are proposed.</p>
        <p>The use of the concept of stimulation and destimulation is applied taking into
account the influence on the degree of personnel efficiency, namely, stimulation – the
effect on the increase and destimulation – on the reduction of the factor.</p>
        <p>Therefore, the term set = { } is associated with the set , where
]〉 is a fuzzy number, = 1, , m is the number of
= 〈 , ( ) ∈ [ ,
term sets, is the number of employees.</p>
        <p>To eliminate the influence of changes in the input variables of the metrics and, as a
consequence, the correction of term sets, a transition to a normalized function is
proposed. Let the previously defined term set be the original one.</p>
        <p>
          The normalized linguistic variable is a mapping on the interval [0; 1]:
= {
},
= 〈 ,
( )
∈ [0; 1]〉,
(
          <xref ref-type="bibr" rid="ref22">22</xref>
          )
where – is a fuzzy number corresponding to the term set
is the number of employees.
on the interval [0; 1], –
, Performance of duties &lt;position&gt;, stimulation
, Job Interchangeability &lt;Interchangeability
        </p>
        <p>Level&gt;, discouragement
, Level of education &lt;education&gt;, stimulation
, Conflict &lt;conflict&gt;, stimulation
, The importance level of the specialty
&lt;SpecialtyLevel&gt;, discouragement
0
1
1
0
0</p>
        <p>The term
designation</p>
        <p>Not performed
1 Partially completed</p>
        <p>Performed</p>
        <p>Low
3.0 Average</p>
        <p>High</p>
        <p>Secondary education
3.0 Bachelor</p>
        <p>Master</p>
        <p>Low
3,0 Average</p>
        <p>High</p>
        <p>Low
0,5 Average</p>
        <p>High</p>
        <p>These functions allow you to display heterogeneous input variables in a single
normalized interval [0; 1], which allows you to reduce errors associated with different
quantities and their dimensions. This provides a convenient representation of the
values, as well as their interpretation.
4</p>
      </sec>
    </sec>
    <sec id="sec-4">
      <title>The method of constructing a model of data mining in</title>
    </sec>
    <sec id="sec-5">
      <title>HR process management</title>
      <p>The structural model of data mining in HR process management is presented in fig. 4.
In the structural model, = { } is a term set, where = 1, , – is the number of
sets, each of which is represented by a fuzzy variable with a domain of definition X.</p>
      <p>The process of modeling fuzzy values is based on a fuzzy inference system, which
allows you to convert expert estimates into fuzzy values.</p>
      <p>In the fuzzy inference system, the procedure for finding a clear value for each of the
input linguistic variables based on defuzzification is applied. Defuzzification in a fuzzy
inference system is the process of finding a value for each of the output linguistic
variables of the set = { , , . . }. The task of defuzzification is to use the results
of accumulation of all output linguistic variables. It is necessary to obtain a quantitative
value of each of the output variables. Output variables can be used in a fuzzy inference
system relative to the input linguistic variable.</p>
      <p>Accumulation of fuzzy inference is the process of finding the membership function
for each of the output linguistic variables of the set.</p>
      <p>The transformation of a fuzzy set into list of values of variables is named as
defuzzification.</p>
      <p>The defuzzification procedure is performed by a sequence that considers each of the
output linguistic variables and the β fuzzy set = related to it. The result of
defuzzification for the output linguistic variable is defined as a quantitative value.</p>
      <p>The defuzzification process is considered complete when quantitative values are
determined for each of the output linguistic variables. For the fuzzy inference system,
the Mamdani algorithm was applied [5; 24].</p>
      <p>
        The Mamdani algorithm includes the following steps [17; 3]:
1. the formation of a rule base for fuzzy inference systems [15; 4];
2. fuzzification of input variables;
3. aggregation of conditions in fuzzy rules to find the degree of truth of the conditions
of each of the rules of fuzzy logic;
4. accumulation of conclusions of fuzzy production rules;
5. defuzzification of output variables based on the center of gravity method.
An example of a rule looks like this:
1. If (Position is Npfd) and (InterchangeabilityLevel is low) and
(Education is secondary) and (Conflict is low) and (SpecialtyLevel is
low) then (StaffEfficiency is NotHardworking) (
        <xref ref-type="bibr" rid="ref1">1</xref>
        )
2. If (Position is Npfd) and (InterchangeabilityLevel is low) and
(Education is bachelor) and (Conflict is low) and (SpecialtyLevel is
low) then (StaffEfficiency is NotHardworking) (
        <xref ref-type="bibr" rid="ref1">1</xref>
        )
3. If (Position is Npfd) and (InterchangeabilityLevel is low) and
(Education is master) and (Conflict is low) and (SpecialtyLevel is low)
then (StaffEfficiency is NotHardworking) (
        <xref ref-type="bibr" rid="ref1">1</xref>
        )
4. If (Position is Pfd) and (InterchangeabilityLevel is high) and
(Education is master) and (Conflict is low) and (SpecialtyLevel is high)
then (StaffEfficiency is Prospective) (
        <xref ref-type="bibr" rid="ref1">1</xref>
        )
      </p>
      <p>= 〈 , ( ) ∈ [ ,
m is the number of terms.</p>
      <p>A model that satisfies these fuzzy sets is their union:
The values of linguistic variables are determined on an ordinal scale. It should be noted
that a linguistic variable, like its original term set, is associated with a specific scale on
which all arithmetic operations are defined.</p>
      <p>Therefore, the term set = is associated with the set , where
]〉, = 1, ; = 1, ; is the number of term sets,
.</p>
      <p>
        (
        <xref ref-type="bibr" rid="ref23">23</xref>
        )
We construct membership functions for the linguistic variable characteristics of
employees, presented in table. 1.
      </p>
      <p>The process of converting experts’ qualitative assessments into fuzzy quantities
consists in mapping the elements of the original term set in the form of constructing
membership functions of fuzzy quantities ∈ .</p>
      <p>The description of linguistic variables is as follows:
Position, {not fulfilled, partially fulfilled, fulfilled}, [0; 1],
InterchangeabilityLevel, {low, medium, high}, [1; 3],
Education, {secondary, bachelor, master}, [1; 3],
Conflict, {low, medium, high}, [1; 3],
SpecialtyLevel, {secondary, bachelor, master}, [1; 3].</p>
      <p>Moreover, the values of the sets are in the range [0; 1] &amp; [1; 3].
5</p>
    </sec>
    <sec id="sec-6">
      <title>Experiments and results</title>
      <p>The use of the Gaussian function is to use the membership function for modeling to
determine fuzzy numbers. It is a form of analytical approximation using functions that
include Gaussian functions.
c) d)
Fig. 5. The membership function of the input linguistic variables: a) “Position”,
b) “InterchangeabilityLevel”, c) “Education”, d) “Conflict”.</p>
      <p>The constructed membership functions of the input linguistic variables are presented
in fig. 5.</p>
      <p>In the fuzzy inference procedure for managing HR processes, it is necessary to
consider the work of employees at all levels of work. The fuzzy inference procedure is
implemented in the MATLAB system, which allowed obtaining the following results
of assessing the degree of personnel efficiency. To perform the procedure, we built the
diligence function of the output linguistic variable “Staff Efficiency”, which is
presented in fig. 6.
The simulation results of assessing the degree of personnel efficiency, which is
presented in fig. 7.</p>
      <p>The authors of the article propose a solution to the problem of constructing a data
analysis method in human resource management and modeling the assessment of the
degree of personnel efficiency based on fuzzy sets.
6</p>
    </sec>
    <sec id="sec-7">
      <title>Conclusion</title>
      <p>In this article offered the following methods for managing Big HR Data, analyzing and
assessing the effectiveness of human resources. Method for analyzing and assessing the
effectiveness of HR in four steps is developed. At the first stage, the problem of
choosing the analyzed indicators is solved. At the second stage, eight procedures to
solve the following tasks are performed. This procedure allows receive assess the
standard or average values of labor productivity, determine a variety of specialties,
assess the level of education, assess the levels of enterprise management, describe many
job responsibilities, determine the conformity and interchangeability of work, to assess
the additional characteristics of employees. At the third stage, the procedure for
assessing the conformity of the specialty to the position held is carried out. At the fourth
stage, the procedure for constructing membership functions based on the theory of
fuzzy sets is performed. In the MATLAB system, a fuzzy inference procedure is
implemented, which made it possible to assess the degree of efficiency of human
resources.
Fig. 7. Modeling the assessment of the degree of personnel efficiency: a) the Specialty Level
and Education, b) the Position and Conflict, c) the Interchangeability Level and Education,
d) the Specialty Level and Conflict.</p>
      <p>Prospects for the application of the method and procedures of fuzzy modeling in human
resource management lie in the expansion of approaches and the use of models of cloud
computing and big data.</p>
    </sec>
  </body>
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