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Plant efficiency: a value stream mapping and overall equipment effectiveness study
2005 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In this Masters Thesis the Overall Equipment Effectiveness, OEE, and Value Stream Mapping, VSM, were used for measuring and making production more efficient as part of Lean Manufacturing. The work has been carried out during the spring and summer of 2004 at some of the foundries of INTERMET Corp in the USA. The INTERMET foundries use OEE and VSM tools to report their results to the company headquarter and to follow up and continuously improve their effectiveness. The fact that OEE is used to compare the different factories might lead to it not being utilized as well as possible. The OEE number is basically a very good measure of the effectiveness of the machines, but should primarily be used for internal supervision of trends. If it is used to compare different factories, the temptation to adapt the values to the expectations might reduce its contribution to the real work of making production more efficient. VSM is a simple and efficient method used to focus on the path a product takes through the value adding chain and to generate good ideas for how to develop, simplify and make this more efficient. The important thing to think about when starting VSM work is to be prepared to implement any improvements quickly, otherwise the results soon will be forgotten and VSM will lose its status as a good and efficient tool. INTERMET should continue their OEE measure for the plants for continuous improvement of the machines and not as a measure for comparing plants. This will be misleading as different plants have different machines. INTERMET should also continue to do VSM mappings on a regular basis to see if the plants actually do change their processes in a lean manufacturing way.

Place, publisher, year, edition, pages
Keyword [en]
Technology, OEE, VSM, Overall Equipment Effectiveness, Value, Stream Mapping
Keyword [sv]
URN: urn:nbn:se:ltu:diva-57831ISRN: LTU-EX--05/245--SELocal ID: e73e8083-0ad7-4116-bad9-eb2b927fc263OAI: diva2:1031219
Subject / course
Student thesis, at least 30 credits
Educational program
Mechanical Engineering, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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