Disputation i systemekonomi: Hatem Algabroun

Titel: On the development of a new digitalised maintenance approach for factory of the future
Ämne: Systemekonomi
Fakultet: Fakulteten för teknik
Datum: Onsdagen den 4 november 2020 kl 9.15
Plats: Sal Newton (C1202), hus C, Växjö, och via Zoom (https://lnu-se.zoom.us/j/64282447047?pwd=TFJSQkJGaEtRVHVRWktwbXdZU3pUZz09)
Opponent: Professor Jayantha Prasanna Liyanage, Universitetet i Stavanger, Norge
Betygsnämnd: Professor Benoît Iung, CRAN, Université de Lorraine, Frankrike
Professor Mats Jackson, Jönköping University
Professor Marco Macchi, Politecnico di Milano, Italien
Ordförande: Professor Gunnar Bolmsjö, Institutionen för maskinteknik, Linnéuniversitetet
Huvudhandledare: Professor Basim Al-Najjar, Institutionen för maskinteknik, Linnéuniversitetet
Biträdande handledare: Lektor Anders Ingwald, Institutionen för fysik och elektroteknik, Linnéuniversitetet
Examinator: Docent Mirka Kans, Institutionen för maskinteknik, Linnéuniversitetet
Spikning: Onsdagen den 7 oktober kl 9.00 på universitetsbiblioteket i Växjö


Over time, maintenance methods have developed following the dynamic manufacturers’ demands. Now, with the coming industrial revolution, new maintenance approaches have to be developed to fulfil the new demands of future industry, as well as to allow companies to benefit from technological advances. Therefore, the research question of this study is: how to develop a maintenance approach for factories of the future? To answer this question, this thesis proposes tools to identify and prioritise maintenance related problems that impact company’s profitability. It explores designing and implementation of a digitalised maintenance approach for future factories. Furthermore, it investigates tools and methods to collect data efficiently by sensors.

The results achieved in this thesis are:

  1. a mathematical representation and application of a model that identifies and prioritises causes of deficiencies in production processes,
  2. a model that identifies and prioritises failures that impact the competitive advantages and profitability of companies,
  3. characterisation of a maintenance approach for future factories,
  4. frameworks that could be utilised to develop a maintenance approach for future factories, as well as, guidelines that help to design this approach,
  5. guidelines for the integration of digitalised maintenance with the database of other working areas,
  6. an algorithm for adaptive sampling for sensors, as well as, a proposal for a generic software architecture to facilitate designing, modelling and implementation of adaptive sampling algorithms.

The conclusion of this thesis confirms previous findings that maintenance has an impact on companies’ competitive advantages, other working areas and profitability. To design and implement a maintenance system, its elements should be extracted from the primary objective of maintenance. These elements should be then allocated in a suitable architecture and their mechanism should also be defined. Prior to implementation and integration, mapping the concept design to production problems can be used to examine its performance. An approach to collect data efficiently by sensors is to use adaptive sampling. The developed adaptive algorithm and the reference software framework for adaptive sampling algorithms could be used for this purpose.


failure impact, digitalised maintenance, adaptive sampling