1、Lessons Learned Entry: 1859Lesson Info:a71 Lesson Number: 1859a71 Lesson Date: 2008-6-3a71 Submitting Organization: GRCa71 Submitted by: Dale Forcea71 POC Name: Dale Forcea71 POC Email: Dale.A.Forcenasa.gova71 POC Phone: 216-433-3520Subject: Use of NASA subject expertise in negotiating contract spec
2、ifications Abstract: NASA subject experts can speed negotiating contract specifications because they know what is and is not the state-of-the-art. They can avoid including requirements that would delay delivery and increase cost without adding value.Description of Driving Event: During contract nego
3、tiations for the Lunar Reconnaissance Orbiter (LRO) Traveling Wave Tube Amplifier (TWTA), NASA subject matter experts provided the following modifications to the requirements; 1. The input drive power range cannot be predicted well for a new TWTA design, so the range was widened from +/-1dB to +/-3d
4、B. 2. Since the TWTA would be operated only on the ground (for testing) and in space, there was no need to use resources to conduct corona, arcing, and multipaction tests at partial vacuum. 3. Methods for testing hot output Voltage Standing Wave Ration (VSWR) did not exist and attempts would endange
5、r the TWTA; however, it was known that the hot VSWR was close to the cold VSWR when the TWTA was transmitting. 4. The phase non-linearity specification was in conflict with other specifications.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Lesson(s
6、) Learned: NASA experts in TWTAs were able to save time and money in developing the LRO TWTA by modifying the TWTA specifications without compromising the final TWTA.Recommendation(s): NASA expertise in systems being purchased should be brought to bear on the specifications both before and during co
7、ntract negotiation.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(s): a71 Space Operationsa71 Sciencea71 Exploration Systemsa71 Aeronautics ResearchAdditional Key Phrase(s): a71 Systems Engineering and Analysis.a71 Systems Engineering and Analysi
8、s.Level II/III requirements definitionAdditional Info: a71 Project: Lunar Reconnaissance Orbiter Traveling Wave tube AmplifierProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Approval Info: a71 Approval Date: 2009-08-28a71 Approval Name: mbella71 Approval Organization: HQProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
