Reduced cycle time and work in process in a medical device factory : the problem and a proposed solution
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2008
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| Online Access: | http://hdl.handle.net/1721.1/42327 |
| _version_ | 1811081077154906112 |
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| author | Qian, Yi, M. Eng. Massachusetts Institute of Technology |
| author2 | Stephen C. Graves. |
| author_facet | Stephen C. Graves. Qian, Yi, M. Eng. Massachusetts Institute of Technology |
| author_sort | Qian, Yi, M. Eng. Massachusetts Institute of Technology |
| collection | MIT |
| description | Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007. |
| first_indexed | 2024-09-23T11:41:17Z |
| format | Thesis |
| id | mit-1721.1/42327 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T11:41:17Z |
| publishDate | 2008 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/423272019-04-12T09:49:57Z Reduced cycle time and work in process in a medical device factory : the problem and a proposed solution Reduced cycle time and WIP in a medical device factory : the problem and a proposed solution Qian, Yi, M. Eng. Massachusetts Institute of Technology Stephen C. Graves. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Mechanical Engineering. Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007. Includes bibliographical references (p. 46). Many manufacturing firms have improved their operations by implementing a work-in-process (WIP) limiting control strategy. This project explores the application of this concept to limit WIP and reduce cycle time for the Becton, Dickinson and Company's manufacturing facility in Tuas, Singapore. BD's Eclipse Safety Needle production line is facing increasing pressure to reduce its high WIP and long cycle times. With the forecast of increasing demand, the current production control practice will sooner or later push the shop floor space to a limit. We divided the overall system into three manageable sub-systems and analyzed different strategies for each. This paper documents the approaches to Needle Assembly machine (AN) and downstream machines, as well as the inventory policy for Needle Shield (NS) and Safety Shield (SS) molded components. At AN and downstream, we can achieve significant reduction in cycle time and work in process by eliminating the unnecessary early start of production and extra delay caused from the current planning method, by reducing transfer batch sizes and by applying mixed scheduling policy at AN. We can obtain further improvement by implementing a CONWIP release rule. For the stocking of NS and SS molded parts, a simple periodic review, base stock inventory policy can effectively reduce the current inventory level by more than 40%, as well as reduce the inventory variation. by Yi Qian. M.Eng. 2008-09-03T15:21:02Z 2008-09-03T15:21:02Z 2007 2007 Thesis http://hdl.handle.net/1721.1/42327 232668312 eng 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 46 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Mechanical Engineering. Qian, Yi, M. Eng. Massachusetts Institute of Technology Reduced cycle time and work in process in a medical device factory : the problem and a proposed solution |
| title | Reduced cycle time and work in process in a medical device factory : the problem and a proposed solution |
| title_full | Reduced cycle time and work in process in a medical device factory : the problem and a proposed solution |
| title_fullStr | Reduced cycle time and work in process in a medical device factory : the problem and a proposed solution |
| title_full_unstemmed | Reduced cycle time and work in process in a medical device factory : the problem and a proposed solution |
| title_short | Reduced cycle time and work in process in a medical device factory : the problem and a proposed solution |
| title_sort | reduced cycle time and work in process in a medical device factory the problem and a proposed solution |
| topic | Mechanical Engineering. |
| url | http://hdl.handle.net/1721.1/42327 |
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