2026-09-18T22:33:23Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/694922022-01-13T07:54:36Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023
Stephen C. Graves.
Raykar, Sumant (Sumant Shreechandra)
Massachusetts Institute of Technology. Dept. of Mechanical Engineering.
Massachusetts Institute of Technology. Department of Mechanical Engineering
2012-02-29T18:21:17Z
2012-02-29T18:21:17Z
2011
2011
http://hdl.handle.net/1721.1/69492
775603495
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2011.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 78-79).
This thesis documents the application of the principles of lean manufacturing and supply chain planning at Varian Semiconductor Equipment Associates. The company's products are highly customizable, and the production schedules change daily to comply with customer requests. In situations where variability - whether in product features or logistics - is high, lean implementation is difficult. Nonetheless, use of lean manufacturing techniques like Value Stream Mapping helps to highlight problems. Value Stream Maps of Varian's processes were drawn which revealed that the main problem was chronic raw material shortages. Further investigation revealed improper supply chain and inventory management. Moreover, existing metrics for parts shortage measurement were found to be lacking in accuracy. Based on the principles of postponement, it is recommended that the work-in-process inventory be reduced. The demand can be met by holding the inventory in raw material form instead, and by improving stocking policies. Also, a better system for shortage measurement was recommended, and a framework for its data collection and analysis was presented. We project that these recommendations will lead to an efficient and lean system of manufacture.
by Sumant Raykar.
M.Eng.
79 p.
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by
copyright. They may be viewed from this source for any purpose, but
reproduction or distribution in any format is prohibited without written
permission. See provided URL for inquiries about permission.
http://dspace.mit.edu/handle/1721.1/7582
Mechanical Engineering.
Lean manufacturing in a mass customization plant : inventory correction and shortage measurement
Thesis
application/pdf
false
Publication
unknown
unknown
<Publication xmlns="https://www.openaire.eu/cerif-profile/1.1/" id="efdffb93-0557-4fd2-a6f3-0cae03bcfc95">
<Type xmlns="https://www.openaire.eu/cerif-profile/vocab/COAR_Publication_Types">http://purl.org/coar/resource_type/c_1843</Type>
<Language>eng</Language>
<Title>Lean manufacturing in a mass customization plant : inventory correction and shortage measurement</Title>
<PublishedIn>
<Publication>
</Publication>
</PublishedIn>
<PublicationDate>2011</PublicationDate>
<Authors>
<Author>
<DisplayName>Raykar, Sumant (Sumant Shreechandra)</DisplayName>
<Affiliation>
<OrgUnit>
</OrgUnit>
</Affiliation>
</Author>
</Authors>
<Editors>
</Editors>
<Publishers>
<Publisher>
<DisplayName>Massachusetts Institute of Technology</DisplayName>
<OrgUnit />
</Publisher>
</Publishers>
<License>http://dspace.mit.edu/handle/1721.1/7582</License>
<Keyword>Mechanical Engineering.</Keyword>
<Abstract>This thesis documents the application of the principles of lean manufacturing and supply chain planning at Varian Semiconductor Equipment Associates. The company's products are highly customizable, and the production schedules change daily to comply with customer requests. In situations where variability - whether in product features or logistics - is high, lean implementation is difficult. Nonetheless, use of lean manufacturing techniques like Value Stream Mapping helps to highlight problems. Value Stream Maps of Varian's processes were drawn which revealed that the main problem was chronic raw material shortages. Further investigation revealed improper supply chain and inventory management. Moreover, existing metrics for parts shortage measurement were found to be lacking in accuracy. Based on the principles of postponement, it is recommended that the work-in-process inventory be reduced. The demand can be met by holding the inventory in raw material form instead, and by improving stocking policies. Also, a better system for shortage measurement was recommended, and a framework for its data collection and analysis was presented. We project that these recommendations will lead to an efficient and lean system of manufacture.</Abstract>
<Access xmlns="http://purl.org/coar/access_right"
>
</Access>
</Publication>