REG NASA-LLIS-0602-1998 Lessons Learned Commercial Electronic Parts Supplier Evaluation (1995).pdf

1、Lessons Learned Entry: 0602Lesson Info:a71 Lesson Number: 0602a71 Lesson Date: 1998-10-01a71 Submitting Organization: JPLa71 Submitted by: S. James/ D. OberhettingerSubject: Commercial Electronic Parts Supplier Evaluation (1995) Abstract: The Mars Pathfinder project experienced initial workmanship p

2、roblems with hybrid DC-DC power converters from a vendor who supplies primarily low cost commercial parts. Working closely with the vendor to improve manufacturing processes and quality, the project was able to obtain some acceptable parts. Maintenance of an approved supplier list, including perform

3、ance of supplier quality surveys, is increasingly important as JPL projects transition from military specification parts, to commercial specification parts where manufacturing processes may not be well documented or controlled.Description of Driving Event: The Mars Pathfinder (MPF) project experienc

4、ed initial workmanship problems with hybrid DC-DC power converters from a vendor who supplies primarily low cost commercial parts. Working closely with the vendor to improve manufacturing processes and quality, the MPF project was able to obtain some acceptable parts.This successful MPF experience l

5、ed the Seawinds, QuickScat, Deep Space 1, Stardust, and Mars 98 projects to purchase similar converters from this vendor. However, vendor process changes since MPF led to significant quality problems with the production lots for these projects. A JPL tiger team was formed to address these quality pr

6、oblems. Significant project costs were incurred in resolving the issues and reworking the converters.The JPL electronic parts procurement practice had been to check the date when the vendor was last surveyed by JPL Quality Assurance. Where no recent survey had been performed, the project funded a ne

7、w on-site vendor survey. This review of vendor manufacturing processes, procedures, and controls resulted in approval, conditional approval, or disapproval of the vendor. Despite the Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-increased utilizati

8、on of low cost commercial quality parts, this JPL practice has fallen into disuse due to small projects budget constraints.Additional Keyword(s): Quality Audit, Supplier AuditLesson(s) Learned: Maintenance of an approved supplier list is increasingly important as JPL projects transition from militar

9、y specification parts, to commercial specification parts where manufacturing processes may not be well documented or controlled.Recommendation(s): 1. Project planning should include sufficient budget for the performance of supplier quality surveys.2. The JPL electronic parts procurement process shou

10、ld develop and maintain an approved supplier list and a vendor rating system to foster new suppliers and identify vendor technical and delivery problems. Such a rating system should be updated periodically incorporating results of testing programs, GIDEP alerts and JPL internal parts bulletins.3. Pr

11、ojects should utilize quality survey results and the vendor rating system.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(s): N/AAdditional Key Phrase(s): a71 Parts Materials & Processesa71 Safety & Mission AssuranceAdditional Info: Provided by IH

12、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Approval Info: a71 Approval Date: 1998-10-14a71 Approval Name: Carol Dumaina71 Approval Organization: 125-204a71 Approval Phone Number: 818-354-8242Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-