REG NASA-LLIS-1220--1998 Lessons Learned - Verification of program requirements at the element level.pdf

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1、Lessons Learned Entry: 1220Lesson Info:a71 Lesson Number: 1220a71 Lesson Date: 1998-10-08a71 Submitting Organization: JSCa71 Submitted by: Dennis Hayes/ Ronald A. MontagueSubject: Verification of program requirements at the element level Description of Driving Event: Throughout 1A/R and 2A verificat

2、ion closure (stage level), considerable resources were expended gathering element level compliance data to provide closure of the identical requirements at the system level (ISS, USOS, AIRD).Root cause: Initial planning did not take into account that some system level requirements are met if and onl

3、y if the same requirements are met by each element on a given flight. Efficiencies can be realized by transferring the verification responsibility for such requirements to the Functional Configuration Audit (FCA) process.Lesson(s) Learned: Proper planning and allocation of verification roles and res

4、ponsibilities must occur to ensure efficient, crisp verification of program requirementsRecommendation(s): In staged or incremental verification planning, identify system level requirements that are met if and only if the corresponding requirements are met by the element on that flight. Use the VLN

5、(verification logic network) to reflect that the verification of such requirements is taken care of by the elements FCA process. No further closure is required at the system level. (This process is being implemented now among EV&CS and other teams.) Evidence of Recurrence Control Effectiveness: N/AP

6、rovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Documents Related to Lesson: N/AMission Directorate(s): N/AAdditional Key Phrase(s): a71 Administration/Organizationa71 Configuration Managementa71 Independent Verification and Validationa71 Policy & Pla

7、nninga71 Safety & Mission Assurancea71 Test & VerificationAdditional Info: Approval Info: a71 Approval Date: 2002-06-27a71 Approval Name: Ronald A. Montaguea71 Approval Organization: JSCa71 Approval Phone Number: 281-483-8576Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-