1、Lessons Learned Entry: 0533Lesson Info:a71 Lesson Number: 0533a71 Lesson Date: 1997-03-27a71 Submitting Organization: JPLa71 Submitted by: K. Clark / D. OberhettingerSubject: Concurrent Engineering Benefits for Low Cost, Short Duration Missions (Teaming of Disciplines) (1996) Abstract: Planned NASA
2、missions will require rapid design and development techniques to reduce costs and shorten schedule times. Mars Global Surveyor represented a transitional project that provided several concurrent engineering lessons. Lessons learned involve reliability engineer collocation with designers, effective t
3、eaming with industrial partners, and formation of competent concurrent engineering teams.Description of Driving Event: NASA envisions smaller, cheaper, and more frequent space and Earth science missions with highly specific goals. Many of these missions will require new types of spacecraft that will
4、 be created using rapid design and development techniques to reduce costs and shorten schedule times. Spacecraft and instrument designers will evaluate design options in an environment in which the engineering and design of flight and ground systems can be done concurrently. Mars Global Surveyor (MG
5、S) represents a transitional project which provided several concurrent engineering lessons:1. Collocation of a dedicated reliability engineer with the designers significantly increased communication and facilitated rapid resolution of reliability issues. Design analyses and their review were focused
6、 and efficient.2. The industrial partnership between JPL and the prime contractor was very effective. Much of the effort JPL typically spends on oversight was instead dedicated to direct partner support in many important areas (e.g., parts, gyros, structures, solar array).3. A JPL project organizati
7、on which generally mirrored that of the industrial partner improved communication, technical interchange, and reporting.4. Insufficient concurrent engineering between the electrical and mechanical engineering Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I
8、HS-,-,-disciplines led to specific issues. Numerous problems were encountered with High Gain Antenna (HGA) encoder design and with electrical and packaging processes. The inherited Dual Temperature Controller (DTC) was misapplied, resulting in failure and complete redesign.Lesson(s) Learned: 1. Coll
9、ocate reliability engineers with designers.2. Maximize teaming between industrial partners and JPL by meeting requests for direct JPL support with identified JPL strengths.3. Establish a JPL project organization which reflects the industrial partners functions to provide significant economy in commu
10、nication, technical interchange, and reporting.4. Provide concurrent engineering teams with the right mix of technical disciplines to review the development approach and monitor progress.Recommendation(s): N/AEvidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Di
11、rectorate(s): N/AAdditional Key Phrase(s): a71 Administration/Organizationa71 Policy & Planninga71 Safety & Mission AssuranceAdditional Info: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Approval Info: a71 Approval Date: 1997-04-04a71 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-,-,-
