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六西格玛实施案例-AFS
Six Sigma Project S I X S I G M A
D M A I C T
Reduce “Dimensional” Rejections Related to
Grinding Process on
Precision Aerospace Fasteners
Son D Tran, Director of QA,
AFS - Industry Operations
1
Reduce Dimensional Variation - Define S I X S I G M A
D M A I C T
DMAIC REVIEW
CONTROL DEFINE
IMPROVE MEASURE
A NALYZE
Develop charter
Map the process
Understand the voice of the customer
2
Reduce Dimensional Variation - Define S I X S I G M A
D M A I C T
Project Overview :
Business Case
Internal rejections of Titanium products cause significant scrap, rework and customer
returns. This level of rejection has affected our Key Performance Indicators (KPI),
customer backlogs, and Quality and Delivery Performance ratings to major OEM
(Original Equipment Manufacturer). Reduction of Internal rejections will increase
customer satisfaction and improve our KPI.
Problem Statement
Dimensional rejections related to the Grinding process(es) of Titanium Hi-Lok in
Cells 131, 132 and 133 attributed to about 2% rejections of total pieces completed-
to-store the last seven months (Sep 01- Feb 02). This attributed to
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