1、Lessons Learned Entry: 1759Lesson Info:a71 Lesson Number: 1759a71 Lesson Date: 2006-04-28a71 Submitting Organization: JPLa71 Submitted by: Thuykien Nguyena71 POC Name: Jon Cowarta71 POC Email: Jon.Cowart-1ksc.nasa.gova71 POC Phone: 321-861-3042Subject: Process Control: Ensuring Suppliers Understand
2、Specs (Video Lesson) Abstract: A video clip lesson learned on the topic of Process Control. A ?squeegee,? a wafer-thin wedge of plastic, is used on the Space Shuttle Solid Rockets to apply the adhesive that bonds critical insulation to the inside of the motor case. Silicone is widely used throughout
3、 industry as a release agent. In this use, it cannot be allowed to contaminate adhesive application tools? even in trace amounts. Its introduction into the adhesive application process can weaken bonds and allow hot gases to force a path between the insulation and the metal case. The supplier delive
4、red squeegees that tested positive for trace amounts of silicone despite clear specifications prohibiting it. The supplier believed it had met this requirement because no silicone was used in the material used to form the squeegee. However, an investigation determined that the supplier had used a si
5、licone-based release agent to ease squeegee removal from the manufacturing molds. If the supplier had known the reason for the no-silicone specification, they would have understood the mission-critical implications of silicone contamination on Space Shuttle components. Clear communications between c
6、ustomers and suppliers is critical to maintaining process control. This 3-minute, 15-second video is a product of the Space Shuttle Program and its Process Control Focus Group.Description of Driving Event: The supplier delivered squeegees that tested positive for trace amounts of silicone despite cl
7、ear specifications prohibiting it. The supplier believed it had met this requirement because no silicone was used in the material used to form the squeegee. However, an investigation determined that the supplier had used a silicone-based release agent to ease squeegee removal from the manufacturing
8、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-molds. Click here to view the lesson learned video. Click here to view a QuickTime version of the video. (Longer download time)Lesson(s) Learned: If suppliers do not understand the rationale for custome
9、r specifications, they may draw erroneous conclusions about customer needs and constraints that may lead to process control escapes.Recommendation(s): Do not rely solely on specifications and other instructions to ensure full supplier compliance with process control requirements, but educate supplie
10、rs so they will understand the underlying rationale.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(s): a71 Exploration SystemsAdditional Key Phrase(s): a71 Program Management.Acquisition / procurement strategy and planninga71 Program Management.C
11、ontractor relationshipsa71 Manufacturing and Assemblya71 Safety and Mission Assurance.a71 Safety and Mission Assurance.Product Assurancea71 Safety and Mission Assurance.Qualitya71 Additional Categories.Flight Equipmenta71 Additional Categories.Hardwarea71 Additional Categories.Industrial Operationsa
12、71 Additional Categories.Parts, Materials, & Processesa71 Additional Categories.Procurement, Small Business & Industrial Relationsa71 Additional Categories.Safety & Mission Assurancea71 Additional Categories.SpacecraftProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Additional Info: a71 Project: Space ShuttleApproval Info: a71 Approval Date: 2007-02-01a71 Approval Name: ghendersona71 Approval Organization: HQProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
