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Investeringsbeslut kopplade till ställtidsreducering: En jämförelse mellan investeringsbeslut baserade på simulering respektive utan simulering
Jönköping University, School of Engineering, JTH, Mechanical Engineering.
Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
2017 (Swedish)Independent thesis Basic level (degree of Bachelor), 180 HE creditsStudent thesis
Sustainable development
Sustainable Development
Abstract [en]

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

Place, publisher, year, edition, pages
2017. , 43 p.
Keyword [sv]
ställtidsreducering, investeringsbeslut, simulering
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:hj:diva-37768ISRN: JU-JTH-IGA-1-20170070OAI: oai:DiVA.org:hj-37768DiVA: diva2:1151163
External cooperation
ROL production AB
Subject / course
JTH, Mechanical Engineering
Supervisors
Examiners
Available from: 2017-10-31 Created: 2017-10-23 Last updated: 2017-10-31Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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  • nn-NB
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Output format
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