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Development of a rating system by means of extended economic appraisal using the digital twin for the design of cyber-physical production systems
Thesis (MEng) -- Stellenbosch University, 2022.
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| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2022
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| _version_ | 1867614136806932480 |
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| access_status_str | Open Access |
| author | Sonnenberg, Manuel |
| author2 | Hummel, Vera |
| author_browse | Hummel, Vera Sonnenberg, Manuel |
| author_facet | Hummel, Vera Sonnenberg, Manuel |
| author_sort | Sonnenberg, Manuel |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MEng) -- Stellenbosch University, 2022. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/126001 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:47:15.075Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/126001 Development of a rating system by means of extended economic appraisal using the digital twin for the design of cyber-physical production systems Sonnenberg, Manuel Hummel, Vera Von Leipzig, Konrad Stellenbosch University. Faculty of Engineering. Dept. of Industrial Engineering. Digital twins (Computer simulation) Cooperating objects (Computer systems) Flexible manufacturing systems Manufacturing Automation Protocol UCTD Thesis (MEng) -- Stellenbosch University, 2022. ENGLISH ABSTRACT: This study seeks to develop a rating system for the comparison of alternative production configurations, which incorporates criteria that are difficult to quantify. The increasing demand for individualization down to batch size 1, coupled with rising price pressure, ambitions to ensure good working conditions, and desire to meet sustainability goals, is forcing manufacturers to optimize their production systems comprehensively. Decisions on production order planning are currently based predominantly on quantifiable aspects, such as available resources and the corresponding financial means, while criteria that are difficult to quantify, such as the adaptability of the production system and the well-being of the employees, are regularly disregarded. This research thesis presents a comprehensive approach of a holistic rating system for the design of cyber-physical production systems (CPPS). The rating system combines a production scenario configurator with a simulation of occupation planning and an economic appraisal extended by the work system value. The aim of the research is to provide a procedure for the short-cycle determination of the most suitable smart production system for small batches, considering assessment dimensions that are expected to have long-term economic, ecological, and social value, and relevance. To achieve this, the simulation is expanded and rating formulas are applied that concentrate the information content while facilitating decision-making. Following the design science research methodology, this study covers both a quantitative and qualitative literature analysis of selected publications to derive a set of work system value criteria relevant to CPPS, and identifies indicators to operationalise them. This is followed by the abductive design of a digital twin-based configuration and rating tool, which is deductively validated with collected data from Werk150, the learning factory of the ESB Business School on the campus of Reutlingen University. The configuration element of the system suggests different possible production scenarios. These result from a variation in the form of production organisation, which entails a change in the division of labour and activity sequencing, as well as the allocation of available devices and agents. In order to make a comparison between the configured scenarios, an extended economic appraisal (EEA) is applied to each; it fuses a partial cost calculation to a work system value. The partial cost calculation is tailored to the aspects that differ between the production variants, material costs, and employee costs. The work system value, which extends the economic appraisal consists of weighted criteria: physical and mental stress; ecology; competence fit; delivery reliability; capacity utilisation; error potential; various flexibility corridors; all of which enable the utility comparison of alternative production scenarios. Information needed to anticipate the partial costs of production scenarios is provided by a time discrete simulation, which considers the properties of the different scenarios. The work system value also takes information from the simulation, but adds to it data collected from experiments. AFRIKAANS OPSOMMING: Hierdie studie poog om 'n graderingstelsel te ontwikkel vir die vergelyking van alternatiewe produksiekonfigurasies wat kriteria insluit wat moeilik is om te kwantifiseer. Die toenemende vraag na individualisering tot by groepgrootte 1, tesame met stygende prysdruk, ambisies om goeie werksomstandighede te verseker en die begeerte om volhoubaarheidsdoelwitte te bereik, dwing vervaardigers om hul produksiestelsels omvattend te optimaliseer. Besluite oor produksiebestellingbeplanning is tans hoofsaaklik gebaseer op kwantifiseerbare aspekte soos beskikbare hulpbronne en die ooreenstemmende finansiële middele, terwyl kriteria wat moeilik is om te kwantifiseer, soos die aanpasbaarheid van die produksiestelsel en die welstand van die werknemers, gereeld verontagsaam word. Hierdie navorsingstesis bied 'n omvattende benadering van 'n holistiese graderingstelsel vir die ontwerp van kuber-fisiese produksiestelsels (KFP) voor. Die graderingstelsel kombineer 'n produksiescenario-konfigureerder met 'n simulasie van beroepsbeplanning en 'n ekonomiese aanslag wat met die werkstelselwaarde uitgebrei word. Die doel van die navorsing is om 'n prosedure te verskaf vir die kortsiklusbepaling van die mees geskikte slim produksiestelsel vir klein groepies, met inagneming van assesseringsdimensies wat na verwagting langtermyn ekonomiese, ekologiese en sosiale waarde en relevansie sal hê. Om dit te bereik word die simulasie uitgebrei en graderingsformules word toegepas wat die inligtingsinhoud konsentreer terwyl besluitneming vergemaklik word. Na aanleiding van die ontwerpwetenskapnavorsingsmetodologie dek hierdie studie beide 'n kwantitatiewe en kwalitatiewe literatuurontleding van geselekteerde publikasies om 'n stel werkstelselwaardekriteria af te lei wat relevant is vir KFP en identifiseer aanwysers om dit te operasionaliseer. Dit word gevolg deur die ontvoerende ontwerp van 'n digitale tweeling-gebaseerde konfigurasie- en graderingsinstrument wat deduktief bekragtig word met versamelde data van Werk150, die leerfabriek van die ESB Business School op die kampus van Reutlingen Universiteit. Die konfigurasie-element van die stelsel stel verskillende moontlike produksiescenario's voor. Dit spruit uit 'n variasie in die vorm van produksie-organisasie, wat 'n verandering in die verdeling van arbeid en aktiwiteitsvolgorde behels, sowel as die toekenning van beskikbare toestelle en agente. Ten einde 'n vergelyking tussen die gekonfigureerde scenario's te maak, word 'n uitgebreide ekonomiese beoordeling op elkeen toegepas; dit smelt 'n gedeeltelike kosteberekening saam met 'n werkstelselwaarde. Die gedeeltelike kosteberekening is aangepas vir die aspekte wat verskil tussen die produksievariante, materiaalkoste en werknemerkoste. Die werkstelselwaarde, wat die ekonomiese beoordeling uitbrei bestaan uit geweegde kriteria: fisiese en geestelike spanning; ekologie; bevoegdheids pas; afleweringsbetroubaarheid; kapasiteitsbenutting; fout potensiaal; verskeie buigsaamheidskorridors; wat almal die nutsvergelyking van alternatiewe produksiescenario's moontlik maak. Inligting wat nodig is om die gedeeltelike koste van produksiescenario's te voorsien word verskaf deur 'n tyddiskrete simulasie wat die eienskappe van die verskillende scenario's in ag neem. Die werkstelselwaarde neem ook inligting uit die simulasie, maar voeg daarby data wat uit eksperimente versamel is. Masters 2022-11-14T21:23:24Z 2023-01-16T12:45:05Z 2022-11-14T21:23:24Z 2023-01-16T12:45:05Z 2022-11 Thesis http://hdl.handle.net/10019.1/126001 en_ZA Stellenbosch University xiii, 131 pages : illustrations application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Digital twins (Computer simulation) Cooperating objects (Computer systems) Flexible manufacturing systems Manufacturing Automation Protocol UCTD Sonnenberg, Manuel Development of a rating system by means of extended economic appraisal using the digital twin for the design of cyber-physical production systems |
| title | Development of a rating system by means of extended economic appraisal using the digital twin for the design of cyber-physical production systems |
| title_full | Development of a rating system by means of extended economic appraisal using the digital twin for the design of cyber-physical production systems |
| title_fullStr | Development of a rating system by means of extended economic appraisal using the digital twin for the design of cyber-physical production systems |
| title_full_unstemmed | Development of a rating system by means of extended economic appraisal using the digital twin for the design of cyber-physical production systems |
| title_short | Development of a rating system by means of extended economic appraisal using the digital twin for the design of cyber-physical production systems |
| title_sort | development of a rating system by means of extended economic appraisal using the digital twin for the design of cyber physical production systems |
| topic | Digital twins (Computer simulation) Cooperating objects (Computer systems) Flexible manufacturing systems Manufacturing Automation Protocol UCTD |
| url | http://hdl.handle.net/10019.1/126001 |
| work_keys_str_mv | AT sonnenbergmanuel developmentofaratingsystembymeansofextendedeconomicappraisalusingthedigitaltwinforthedesignofcyberphysicalproductionsystems |