1、Lessons Learned Entry: 1727Lesson Info:a71 Lesson Number: 1727a71 Lesson Date: 0-04-14a71 Submitting Organization: JPLa71 Submitted by: Thuykien Nguyena71 POC Name: Jon Cowarta71 POC Email: jon.n.cowartnasa.gova71 POC Phone: 321-861-3042Subject: Diffusion Confusion: Achieving Process Control Given C
2、omplex Networks of Suppliers (Video Lesson) Abstract: A video clip lesson learned on the topic of Process Control. The Shuttle External Tank (ET) employs a diffuser to control the uniform dispersal of gases used to maintain positive pressure as the level of liquid oxygen and liquid hydrogen drop aft
3、er launch. An unacceptable material substitution by a sub-tier vendor was discovered that affected a number of diffusers already installed on ETs, including one on the tank mated to Discovery for the Return-to-Flight mission. Effective process control assures that guidelines are followed and that mi
4、ssion-critical products are created the same way every time. This 4-minute, 48-second video is a product of the Space Shuttle Program and its Process Control Focus Group.Description of Driving Event: Click here to view the lesson learned video. Click here to view a QuickTime version of the video. (L
5、onger download time)Lesson(s) Learned: When spaceflight programs employ a complex network of suppliers, an unacceptable material substitution by a sub-tier vendor may not be detected until a component is already installed.Recommendation(s): Provided by IHSNot for ResaleNo reproduction or networking
6、permitted without license from IHS-,-,-Give special attention to process control and verification for completed assemblies that are acquired through complex supplier relationships that involve multiple tiers and multiple sources at the same tier.Evidence of Recurrence Control Effectiveness: N/ADocum
7、ents Related to Lesson: N/AMission Directorate(s): a71 Exploration SystemsAdditional Key Phrase(s): a71 Program Management.a71 Program Management.Acquisition / procurement strategy and planninga71 Program Management.Communications between different offices and contractor personnela71 Engineering Des
8、ign (Phase C/D).a71 Engineering Design (Phase C/D).Launch Systemsa71 Engineering Design (Phase C/D).Propulsiona71 Mission Operations and Ground Support Systems.a71 Mission Operations and Ground Support Systems.Launch support systemsa71 Safety and Mission Assurance.a71 Safety and Mission Assurance.Pr
9、oduct Assurancea71 Safety and Mission Assurance.Qualitya71 Additional Categories.Additional Info: a71 Project: Space ShuttleProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Approval Info: a71 Approval Date: 2006-12-18a71 Approval Name: ghendersona71 Approval Organization: HQProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
