1、Lessons Learned Entry: 0904Lesson Info:a71 Lesson Number: 0904a71 Lesson Date: 2000-07-21a71 Submitting Organization: GSFCa71 Submitted by: Nick ChrissotimosSubject: ESSP VCL Selection and Formulation Description of Driving Event: Selection of VCL as the first ESSP mission, given the cost cap, sched
2、ule and mission assurance requirements as specified in the initial ESSP AO in 1996. The primary focus of the AO was on good science, low cost, short schedule, and PI led missions. The AO had minimal mission assurance requirements and relied on the proposers to utilize their current and best internal
3、 management practices with minimal NASA oversight.Lesson(s) Learned: The initial cost cap category of $60M for the total life cycle cost including the launch service and a 36 month launch readiness was too low for this class of mission. The mission had proposed excellent science with new technology
4、and a streamlined experienced management team. During the formulation phase project management and system engineering had to be changed and enhanced due to inexperience, lack of a significant infrastructure and the restricted budget, this caused a disruption and delay in the formulation phase. In ad
5、dition, the instrument interfaces were not well defined and the instrument technology proved to be difficult to develop, as well as the management of the instrument definition and proposed development. For PI mode managed missions the PI needs to select an established and experienced flight project
6、management team with the infrastructure to provide the required management functions.Recommendation(s): The second ESSP AO was improved, including putting a greater emphasis on mission assurance, management and technology readiness levels. In addition, the cost caps were raised and schedule requirem
7、ent for launch readiness lengthened. Selections were made not only on science but also on the management capability of the PIs team and the readiness for implementation.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Evidence of Recurrence Control Ef
8、fectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(s): a71 ScienceAdditional Key Phrase(s): a71 Policy & Planninga71 Risk Management/Assessmenta71 Safety & Mission AssuranceAdditional Info: Approval Info: a71 Approval Date: 2000-09-18a71 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-,-,-
