Application of an Industry 4.0 Assessment Model: A Case Study
Application in Material Supply for Assembly
Matthias Horvath
1a
, Matteo De Marchi
2b
, Erwin Rauch
2c
and Dominik T. Matt
2,3 d
1
Department of Industrial Engineering and Management, Management Center Innsbruck (MCI), Maximilianstrasse 2,
Innsbruck, Austria
2
Industrial Engineering and Automation (IEA), Faculty of Science and Technology, Free University of Bolzano,
Universitätsplatz 1, Bolzano, Italy
3
Innovation Engineering Center (IEC), Fraunhofer Italia Research Scarl, A.-Volta Street 13A, Bolzano, Italy
Keywords: Industry 4.0, Assessment, Material Supply, Assembly, Semi-structured Interview, Case Study Research.
Abstract: Material supply in production companies is currently facing numerous challenges. This paper therefore
pursues the goal of analysing the potential of single Industry 4.0 concepts for the further development and
efficiency optimization of material supply in assembly in an industrial case study. The determination of
potentials in the context of the individual case study at an internationally active rail vehicle manufacturer is
done by using a maturity level based Industry 4.0 assessment. Subsequent semi-structured interviews have
been conducted to further explore the potential and feasibility of the identified Industry 4.0 measures for
optimizing efficiency of material supply in assembly. This study represents an application oriented research
for validation of a previously developed Industry 4.0 assessment model.
1 INTRODUCTION
Digitalization is having a considerable impact on
companies and in some cases are placing completely
new challenges on the entire organization (Parviainen
et al., 2017; Sony, 2020). This makes it important for
companies to constantly develop and adapt to new
conditions in order to maintain the company's success
in the future.
After a long period of organizational optimisation
based on Lean Production and the introduction of
Lean methods for waste reduction (Dallasega et al.,
2015; Jiang et al., 2021), in particular, the proclaimed
fourth industrial revolution, known as Industry 4.0, is
intended to contribute to maintaining competitiveness
by applying the most innovative technologies
(Oztemel & Gursev, 2020; Shuttleworth et al., 2022).
Thus, it is essential for companies to design their own
strategy and roadmap for long-term sustainable
digital transformation (Martinez-Olvera, 2022).
a
https://orcid.org/0000-0002-0297-2888
b
https://orcid.org/0000-0001-7965-4338
c
https://orcid.org/0000-0002-2033-4265
d
https://orcid.org/0000-0002-2365-7529
In addition to the digital transformation of
manufacturing and assembly systems also supporting
areas like production logistics and material supply are
showing a high potential for applying Industry 4.0
concepts and technologies (Junge, 2019).
For many companies, however, the
transformation to Industry 4.0 represents a major
challenge (Vuksanović et al., 2020; Nardo et al.,
2020). In addition to a missing overview of existing
Industry 4.0 concepts and technologies, they lack the
knowledge of how such concepts can be implemented
and which ones should be given priority in terms of
introduction. However, in order to successfully
manage this challenge and to find one's way in the
development of a comprehensive "big picture", it is
important for companies to go through a self-
assessment and to determine the potential laying in
Industry 4.0. To give other manufacturing companies
an example of how to face this challenges a case study
based research has been conducted and results are
summarised in this paper.
176
Horvath, M., De Marchi, M., Rauch, E. and Matt, D.
Application of an Industry 4.0 Assessment Model: A Case Study Application in Material Supply for Assembly.
DOI: 10.5220/0011591000003329
In Proceedings of the 3rd International Conference on Innovative Intelligent Industrial Production and Logistics (IN4PL 2022), pages 176-183
ISBN: 978-989-758-612-5; ISSN: 2184-9285
Copyright
c
2022 by SCITEPRESS Science and Technology Publications, Lda. All rights reserved
2 RESEARCH QUESTIONS AND
METHODOLOGY
The aim of this case study research carried out in
collaboration with a Swiss rail vehicle manufacturer
was to analyse the potential of Industry 4.0 for
optimizing the efficiency of internal material supply
in assembly and to test and validate a previously
developed Industry 4.0 assessment model (Rauch et
al., 2020) for derivation of the most suitable Industry
4.0 technologies for these purpose. The investigation
is carried out with a specific view on production
logistics, especially in the field of material supply of
the assembly department. The following research
questions can be defined:
RQ1: Which Industry 4.0 concepts show a high
potential for efficiency optimization for material
supply in assembly at the case study company?
RQ2: To what extent is a maturity level based
Industry 4.0 assessment helpful in the selection of
those Industry 4.0 concepts?
For this purpose, a mixed method research
approach has been applied combining quantitative
research (Industry 4.0 assessment model) as well as
qualitative research (based on semi-structured
interviews). The determination of potential Industry
4.0 technologies is based on a maturity-based
Industry 4.0 assessment model according to Rauch et
al. (2020). This comprises a catalogue of a total of 42
individual Industry 4.0 concepts identified by
literature analysis, as well as four standard strategies
to assist in the introduction of corresponding
measures. This approach provides an overview of the
current status of Industry 4.0 technologies applied in
the case study company. Using this approach, the
significance of potential Industry 4.0 technologies is
encoded and the current status and medium-term
target status of individual Industry 4.0 concepts or
technologies in the company are determined. These
findings then form the basis for a preselection. Based
on this analysis, semi-structured interviews with 10
experts from the company has been conducted to, to
examine in more detail the feasibility of
implementation and to derive a roadmap for
implementation. This holistic roadmap is intended to
guide the case study company to implement selected
Industry 4.0 concepts in this field of material supply.
Finally this paper discusses the findings and lessons
learned of this case study research and provides an
outlook for further research.
3 OVERVIEW OF THE APPLIED
INDUSTRY 4.0 ASSESSMENT
MODEL
The model considered is based on a total of 42
Industry 4.0 concepts and technologies identified by
systematic literature analysis (Rauch et al., 2020).
These concepts are assigned on a first level to four
dimensions as follows:
1. Operational Dimension: Focus on operational
and operational processes;
2. Organizational Dimension: Focus on
organizational and management-oriented
processes;
3. Socio - cultural Dimension: Focus on corporate
culture and employee-related issues;
4. Technological Dimension: Focus on data and
process-oriented technologies.
In addition, a second sub-level contains a total of
21 defined categories to which the individual
concepts are assigned. An overview of these two
levels, including all 42 Industry 4.0 concepts included
in this assessment model, is summarized in Table 1.
Table 1: Industry 4.0 dimensions, categories and concepts
(Rauch et al., 2020).
Level 1 Level 2 Level 3
1
Operations
Agile
Manufacturing
Systems
Agile Manufacturing Syste
m
2 Self-Adapting Manufacturing
Systems
3 Continuous and Uninterrupted
Material Flow Models
4 Plug and Produce
5
Monitoring &
Decision
Systems
Decision Support Systems
6 Integrated and Digital Real-Time
Monitoring Systems
7 Remote Monitoring of Products
8 Big Data Big Data Analytics
9 Production
Planning and
Control
Enterprise Resource Planning /
Manufacturing Execution System
10
Organization
Business Model
4.0
Digital Produc
t
-Service Systems
11 Servitization and Sharing
Economy
12 Digital Ad
d
-on or Upgrade
13 Digital Loc
k
-In
14 Freemiu
m
15 Digital Point of Sales
16 Innovation
strategy
Open Innovation
17 Strategy 4.0 Industry 4.0 Roadmap
18
Supply Chai
n
Management 4.0
Sustainable Supply Chain Design
19 Collaboration Network Models
20
Social-
Culture
Human
Resource 4.0
Training 4.0
21 Work 4.0 Role of the Operato
r
22 Culture 4.0 Cultural Transformation
Application of an Industry 4.0 Assessment Model: A Case Study Application in Material Supply for Assembly
177
Table 1: Industry 4.0 dimensions, categories and concepts
(Rauch et al., 2020) (cont.).
Level 1 Level 2 Level 3
23
Technology
Big Data Cloud Computing
24
Communication
& Connectivity
Digital and Connected
Workstations
25 E-Kanban
26 IoT and Cybe
-Physical Systems
27 Cyber Security Cyber Security
28 Deep Learning,
Machine
Learning,
Artificial
Intelligence
Artificial Intelligence
29
Object Self Service
30 Identification
and Tracking
Technology
Identification and Tracking
Technology
31 Additive
Manufacturing
Additive Manufacturing (3D
Printing)
32
Maintenance
Predictive Maintenance
33 Telemaintenance
34
Robotics &
Automation
Automated Storage Systems
35 Automated Transport Systems
36 Automated
Manufacturing/Assembly
37 Collaborative Robotics
38 Smart Assistance Systems
39 Product Design
and
Developmen
t
Product Data Management and
Product Lifecycle Management
40
Standards 4.0
Cyber-Physical System
Standards
41 Virtual Reality,
Augmented
Reality, and
Simulation
Virtual and Augmented Reality
42 Virtual Reality,
Augmented
Reality, and
Simulation
Simulation
For each of these concepts, corresponding
maturity levels are defined in a Likert scale from 1 to
5. In order to improve understanding, a brief
description of the respective maturity level is always
accompanied by a relevant example. Figure 1 shows
an example of a section of the assessment model with
their Industry 4.0 concepts and associated maturity
levels.
Figure 1: Maturity levels of the Industry 4.0 assessment
(Rauch et al., 2020).
In addition to the current state of implementation
of Industry 4.0 concepts, an aspired target state and
the significance / potential of the individual
technologies are assessed on the basis of the maturity
levels. The current state of implementation of
individual concepts and technologies is referred to as
the "I4.0 Score". The information on the future
maturity level is the "Target Score". This should take
into account both the factors of medium-term
achievability of the targeted state and realistic
feasibility of implementation. The additional
information on the importance of the respective
concept is likewise provided on the basis of a Likert
scale, from 1 to 5. This value is of corresponding
relevance, as not every concept appears to be equally
important for the respective company. This
assessment is thus an expression of the potential of
the individual Industry 4.0 concept in the case study
company. Figure 2 shows the fields to be encoded by
the user to determine the "I4.0 Score" and "Target
Score" as well as the "Importance”.
Figure 2: Fields to be filled in by the user of the assessment
model (Rauch et al., 2020).
The assessment regarding the current and the
medium-term target state form the basis for
calculating the so-called "I4.0 Gap". This thus
describes the difference between the stated "I4.0
Score" and the "Target Score" of the company. As a
result, this expression provides a helpful
quantification with regard to the difficulty of
achieving the desired target state of the individual
Industry 4.0 concept. For evaluation purposes, the
"I4.0 Scores" and the "Target Scores", are visually
represented in radar diagrams for operational,
organizational, socio-cultural and technological
(further subdivided into process-driven and data-
driven levels) dimension. Figure 3 shows an example
of the result of such a "Gap Analysis", which is
generated automatically by the assessment tool.
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Figure 3: Automatically generated radar charts in the
Industry 4.0 assessment (Rauch et al., 2020).
To support the gradual and systematic
implementation of Industry 4.0 concepts, the
collected data are combined in a standard strategy
matrix. This matrix is divided into four quadrants:
Quick-Wins: high potential - low gap.
Must-haves: high potential - high gap
Low Hanging Fruits: low potential - low gap.
Money Pits: low potential - high gap.
The following Figure 4 shows a schematic
representation of the standard strategy matrix.
Figure 4: Standard Strategy Matrix (Rauch et al., 2020).
4 CASE STUDY APPLICATION
In the following, we apply the presented method in
combination with semi-structured interviews to a case
study company. The case study company is an
internationally active rail vehicle manufacturer with
two plants employing a total of up to 1,300 people.
4.1 Research Design
In general, the research design can be seen as the way
in which the investigation is designed (Kuckartz,
2014). In addition to the description of the approach,
this also includes the selection of the methods, the
study participants, and the approach for data
preparation and subsequent data analysis (Becker et
al., 2017).
The investigation within the empirical research
part of this study is basically conducted as a single
case study at a European rail vehicle manufacturer.
By means of the individual case study as a general
research design, this work analyses the potentials and
applicability of Industry 4.0 technologies for the
efficiency optimization of the material supply in the
assembly department. Because of the same "data
source" in the industrial case study, the individual
results of the investigation can therefore be directly
related to each other. This makes it possible to
generate an individual result for the case study
company, which thus contributes significantly to
answering the first research question (Lamnek &
Krell, 2016).
The single case study in this work is based on a
mixed methods design using a sequential approach,
namely the qualitative in-depth approach
("explanatory design"). In a two-phase procedure,
data is first collected quantitatively, within the
framework of the previously presented maturity-
based Industry 4.0 assessment and analysed by using
descriptive statistics. In a second step, the results of
the quantitative part will be better understood with the
help of qualitative interview research. In this sense,
the results of the quantitative survey will be used to
design semi-structured expert interviews. In these
interviews, explanatory gaps that arose from the
maturity-based Industry 4.0 assessment are to be
closed in a targeted manner. Accordingly, the
interviews conducted have been evaluated using a
qualitative content analysis.
In this data collection, 15 identified managers and
experts of the case study company took over the role
of study participants in the first step of the
investigation (quantitative Industry 4.0 assessment).
Persons from different organizational levels
(management, department management, team
management, group management, employees) have
been selected. They work in the departments
"Systems and Processes", "Production", "Logistics",
"Purchasing" and "Digital Products". In this way, the
analysis from different perspectives on Industry 4.0
technologies and their potential with regard to
optimizing the efficiency of the company's material
Application of an Industry 4.0 Assessment Model: A Case Study Application in Material Supply for Assembly
179
supply in assembly is intended to be as
comprehensive as possible.
10 of the before mentioned 15 study participations
have been identified as experts in the field and have
been selected for the semi-structured interviews.
Either these interviewees have specific knowledge of
the company's internal material supply of assembly
due to their professional fields of activity, or they
have a fundamental technical knowledge of the topic
of Industry 4.0, its technologies or also of the general
process management at the case study company.
4.2 Results of the Industry 4.0
Assessment
The results in this section ("I4.0 score", "Target
Score", "Importance") always refer to average values
(arithmetic mean), which were formed on the basis of
the information on the Industry 4.0 self-assessment
model. The result is a visual representation of the
current status and the desired target state, as well as
the gap between these specific states.
In the first step of the analysis, the focus was on
the participants' responses to the current status of the
individual concepts. The ratings tend to be at a low
level. This can be deduced from the results, as only
one concept has an average score of greater than 4. In
addition, the standard deviations and coefficients of
variation determined indicate that there is not really a
uniform opinion among the responses in these cases.
It can therefore be concluded that there are most
probably different levels of knowledge regarding the
current maturity of the respective Industry 4.0
individual concepts. Starting with the concept with
the highest average maturity rating, the ten individual
concepts or technologies with the highest ratings are
listed below in Table 2. Ratings in Table 2 to Table 4
are always indicated in a range from 1-5.
Table 2: I4.0 Score - Top 10 Industry 4.0 concepts.
Industry 4.0 concept Average
Standard
Dev.
Variation
coefficient
E-Kanban 4,25 1,26 30%
Automated Warhouse
Systems
3,50 0,63 18%
Cloud Computing 3,17 0,77 24%
Computer Aided Design 3,08 0,73 24%
Cyber Security 2,92 1,17 40%
ERP-MES 2,83 0,42 15%
Technology Partnerships 2,83 1,24 44%
Open Innovation 2,75 1,07 39%
Sustainable Supply Chain
Design
2,67 1,25 47%
Acceptance and Warranty 2,67 0,91 34%
In the analysis of the target state, the following
order emerged on the basis of the participants'
responses to the "Target Score" column, as shown in
Table 3, for the ten concepts with the highest average
ratings. The standard deviation and coefficient of
variation shows a quite coherent opinion of the study
participants regarding the target to be achieved.
Table 3: Target Score - Top 10 Industry 4.0 concepts.
Industry 4.0 concept Average
Standard
Dev.
Variation
coefficient
E-Kanban 4,83 0,36 7%
Automated Warhouse
Systems
4,58 0,63 14%
Technology Partnerships 4,42 0,75 17%
ERP-MES 4,33 0,84 19%
Open Innovation 4,25 0,91 21%
Digital and Connected
Workstations
4,25 0,80 19%
Cyber Security 4,25 1,05 25%
Business Process Mining 4,25 1,07 25%
Digital Shopfloor
Management
4,17 0,80 19%
Industry 4.0 Roadmap 4,17 0,83 20%
In the next step of the presentation of results, the
average importance of the individual Industry 4.0
concepts is shown according to the assessments of the
survey participants in the "Importance" column of the
assessment model (see Table 4).
Table 4: Importance - Top 7 Industry 4.0 concepts.
Industry 4.0 concept Average
Standard
Dev.
Variation
coefficient
E-Kanban 4,58 0,74 16%
Identification and Tracking 4,25 0,82 19%
Automated Warehouse
Systems
4,25 0,77 18%
ERP-MES 4,25 0,82 19%
Cyber Security 4,17 1,10 26%
Industry 4.0 Roadmap 4,00 1,04 26%
Real-Time Monitoring 4,00 1,00 25%
Seven of the top 10 individual concepts have a
value greater than or equal to 4. According to the
Industry 4.0 assessment model used, this means that
the participants in the study rate them as "important"
to "very important". The standard deviation and the
coefficient of variation for the "Importance" rating
were calculated. These two values indicate that
opinions on the topics of "cyber security", "Industry
4.0 roadmap" and "real-time monitoring" diverge
more than the other top level concepts.
Based on the results of the study the Standard
Strategy Matrix has been created (see Figure 5).
These helped the research team together with the
company management to select the Industry 4.0
concepts that are of highest importance to reach the
set goal. Doing this the research team defined as a
threshold a potential (“importance”) of minimum 4.
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Figure 5: Standard Strategy Matrix in the case study.
In accordance to this threshold, the following
seven Industry 4.0 concepts have been identified as
key concepts for optimizing the efficiency of the
internal material supply in assembly:
1) Industry 4.0 Roadmap
2) Identification and Tracking
3) ERP-MES
4) Real-Time Monitoring
5) Cyber Security
6) Automated Warehouse Systems
7) E-Kanban.
4.3 Implementation Roadmap based on
Semi-structured Interviews
The interview results of the semi-structured
interviews refer to the key concepts identified in
Section 4.2. The following main questions have been
used in the interviews:
1. Where do you see the specific potential of each
individual concept with regard to the area of
internal material supply of the assembly? What
does it entail?
2. Have you ever had any experience with the
implementation of the indicated concepts? If so,
what is your experience?"
3. If we take a more concrete look at each concept,
how do you evaluate its feasibility to be
implemented in the case study company?
4. How do you think are new technologies and
processes accepted by the employees? What could
be done to facilitate the change?
Based on the selected Industry 4.0 concepts and the
interviews, an implementation roadmap has been
created.
The duration for the introduction of the individual
Industry 4.0 concepts was derived from the estimates
and suggestions of the interview participants.
According to the interview analyses, the creation of
an Industry 4.0 roadmap stood out as the first step in
the overall further development toward the target
status. Following this, the expansion of the current
Kanban system into an E-Kanban system should be
started. As a reason for this, the interview participants
mentioned the easy manageable effort for an E-
Kanban. This is because a Kanban system is already
in use. Immediately following, the implementation of
an identification and tracking system is considered
important. A major reason for this is, for example, the
issue of internal material losses and large numbers of
search processes. In the same course, the effort for the
introduction of a real-time monitoring is seen. In the
next steps, the implementation of the topic "ERP-
MES", as well as that of the automatic storage
systems, especially for the area of the pallet
warehouse, should be initiated and carried out. The
topic "Cyber Security" is considered as a measure to
be treated continuously throughout the
implementation project. This means that parallel to
Application of an Industry 4.0 Assessment Model: A Case Study Application in Material Supply for Assembly
181
the introduction of the individual concepts
mentioned, work is constantly being carried out on
this. This is because a reduction of security gaps and
possibly data losses, manipulations or entire system
failures due to cyber-attacks cannot be postponed, but
must be started out immediately.
4.4 Identified Challenges for
Implementation
Based on the results of the interviews the following
challenges for implementation could be identified and
supported the project team in risk mitigation:
1) Industry 4.0 Roadmap:
High effort and needed time for elaboration of
the roadmap;
Lack of expertise;
Finding consensus among stakeholders.
2) E-Kanban:
Insufficient space in the warehouse;
Poor article definition and standardization;
Matching between Kanban inventories and
ERP system.
3) Identification and Tracking:
Clarification of the specific mode of operation;
Lack of capacity among internal IT specialists.
4) Real-time Monitoring:
Correct master data maintenance;
Data protection;
Predefinition of optimal process parameters.
5) ERP-MES:
Correct master data maintenance;
Lack in employee qualification;
High cost.
6) Automated Warehouse Systems:
Infrastructural adjustments;
Temporary storage of stocks;
Different load carriers.
7) Cyber Security:
Possible interface problems;
Increased competence requirements for the
parties involved;
Identification of the data to be protected.
An additional challenge relevant for all planned
changes is employee acceptance (see also Sony &
Mekoth, 2022). The general attitude of employees
and managers at the case study company toward the
implementation of new technologies and concepts of
Industry 4.0 is considered by the interview
participants to be rather conservative and reserved.
One of the main aspects mentioned in this context is
that the products to be produced are always
customized products with a high diversity of
components.
5 DISCUSSION
The discussion section is subdivided in a part
discussing the potential for generalisation of the
presented approach. A next part discusses then
identified limitations as well as the relevance to
theory and practice.
5.1 Generalisation of the Approach
The results of the individual case study may well be
of use to general production companies as well.
Particularly for large companies and companies in the
rail vehicle industry, the insights into which
individual Industry 4.0 concepts have a high potential
for optimizing the efficiency of material provision in
assembly can be of great interest. In particular,
however, the information on the potential background
and the implementation also offer the companies
great added value. Namely, precisely these
companies have similar structures, financial
resources or even employee numbers and
qualifications due to their size. With this information,
they can drive forward the further development of
material provision more quickly and in a more
targeted manner.
5.2 Limitations and Implications
Despite the results achieved, the elaboration has
shown that certain limitations also go hand in hand
with this. One point here is that only people from
within the company took on the role of study
participants during the data collection. Thus, there is
certainly a limitation, in the sense of a restricted
company view. Integrating external consultants,
experts or even supply partners in the selection of the
study participants would lead to an improved quality
of the results and increase the objectivity.
The research presented provides a practical
picture of the potential of individual Industry 4.0
concepts for optimizing the efficiency of material
provision in assembly and its implementation. Thus,
the results provide information with regard to a
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182
clearly practice-relevant goal, namely the further
development and increase in efficiency of company-
internal processes. Thus, this work has a much greater
practical relevance than relevance to theory.
6 CONCLUSION AND OUTLOOK
As a results of this case study research based work,
both initially set research questions could be
answered.
First of all the results of the Industry 4.0
assessment and the semi-structured interviews
showed which concepts for optimizing the efficiency
of material supply in assembly have high potential, if
there is given feasibility for implementation and how
they can be introduced as part of a holistic Industry
4.0 concept in the case study company.
Secondly the applied approach using the proposed
Industry 4.0 assessment model proved to be very
helpful. According to the own experience in its
application and feedback from the study participants,
the model helped above all to gain an overview of
possible Industry 4.0 concepts and to determine the
current status in the implementation as well as the
desired target state.
As outlook for the future the research team will
apply the model to other case study companies to gain
a broader overview of the applicability in different
industry sectors. The case study company will now
start the implementation of the seven shortlisted key
concepts for Industry 4.0 based on the proposed time
plan.
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