REG NASA-LLIS-0889-2000 Lessons Learned Budgetary Reserve Recommendation for Technology Validation Missions.pdf

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1、Lessons Learned Entry: 0889Lesson Info:a71 Lesson Number: 0889a71 Lesson Date: 2000-06-28a71 Submitting Organization: GSFCa71 Submitted by: Bryant CramerSubject: Budgetary Reserve Recommendation for Technology Validation Missions Description of Driving Event: The New Millennium Programs First Earth-

2、Observing Mission (NMP/EO-1) was selected for flight in March 1996 and completed its Confirmation Review in May 1997. At the time of selection, the EO-1 Project had a 10% budgetary reserve. By the end of the Confirmation Review nearly 75% of this reserve was committed to additional mission definitio

3、n, an overrun in one of the advanced technologies, and implementing four risk mitigation recommendations of the Confirmation Review Board. The Goddard Space Flight Center Program Management Council recommended that the EO-1 budget be augmented by 7.3% to restore the reserve committed during the defi

4、nition process. After review, the Earth Science Enterprise provided the additional budget.Lesson(s) Learned: A 10% budgetary reserve is inadequate for a technology validation mission. The EO-1 experience suggests that 15% is a minimum and 20% would be preferred. Three characteristics peculiar to tec

5、hnology validation missions require this additional reserve. Accurately assessing the maturity of an advanced technology is very important. Considerable reserve can be quickly expended in maturing a technology to reach flight status consistent with the aggressive schedule typical of such missions. I

6、n a related way, using reserve to overcome whatever difficulties may be encountered in the fabrication of “first-time“ flight hardware is another activity that can quickly consume considerable reserve. Lastly, the exact performance needed to effectively validate the advanced technology may not be fu

7、lly understood until rather late in the definition process and this may increase the cost of the spacecraft.Recommendation(s): Future technology validation missions should carry a minimum budgetary reserve of 15% at the Provided by IHSNot for ResaleNo reproduction or networking permitted without lic

8、ense from IHS-,-,-Confirmation Review.Evidence of Recurrence Control Effectiveness: Subsequent experience with other technology validation missions has indicated that this recommendation is appropriate for this class of missions.Documents Related to Lesson: N/AMission Directorate(s): a71 Exploration

9、 Systemsa71 Sciencea71 Aeronautics ResearchAdditional Key Phrase(s): a71 Administration/Organizationa71 Financial Managementa71 Flight Equipmenta71 Hardwarea71 Policy & Planninga71 SpacecraftAdditional Info: Approval Info: a71 Approval Date: 2000-07-13a71 Approval Name: Eric Raynora71 Approval Organization: QSa71 Approval Phone Number: 202-358-4738Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-