Purpose - The purpose of this study is to investigate how the use of discrete event simulation affects investment decisions linked to changeover time reduction. This purpose has been met by answering the following two questions: • How does an investment analysis differ, regarding changeover time reduction, based on discrete event simulation from one that is not? • How is an investment decision in setup time reduction affected if the decision is based on discrete event simulation or not? Method - The study has been conducted as a one-off study at a Swedish manufacturing company where data collection has taken place through interviews and observations. This data has then been analyzed both as a comparison between the company's existing investment analysis and an investment analysis expanded by simulation. This result has, in turn, been compared against a theoretical framework developed during a literature review. Findings - This study shows that simulation enables the ability to take into account more parameters of both changeover time itself and surrounding factors such as sequencing and batch sizes, fitter dependency and buffers. It also enables the impact of variation to be visualized. The result also indicates that an investment decision that takes place without simulation and without regard to the extension of parameters risks overestimating the benefit of the investment. Limitations - The main limitations in this study consist of that only increased throughput and the reduced cost this may result in is used as a measure of the benefit of an investment decision. No other aspects that a reduction in changeover time can affect have been taken into account in the analysis, even though it is discussed in the discussion chapter. The study has also not made any difference to the effort required to reduce the changeover time or reduce the variation of changeover time. This means that the cost of changeover time reduction or reduction of its variation is considered the same no matter where in the process it takes place as long as it is equal in size. Keywords – Discrete event simulation, Setup-time reduction, investment basis, investment decision
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:hj-37768 |
| Date | January 2017 |
| Creators | Jernling, Kristoffer, Svensson, Erik |
| Publisher | Tekniska Högskolan, Högskolan i Jönköping, JTH, Maskinteknik, Tekniska Högskolan, Högskolan i Jönköping, JTH, Industriell organisation och produktion |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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