1、Lessons Learned Entry: 1274Lesson Info:a71 Lesson Number: 1274a71 Lesson Date: 1998-04-20a71 Submitting Organization: JSCa71 Submitted by: Ronald MontagueSubject: Planning and Design of Test Series Description of Driving Event: Flight element testing is very necessary but expensive; program schedule
2、 pressures typically mandate performing the minimum set of tests possible. The paper/documentation process associated with troubleshooting problems and/or performing detailed investigations of unexpected test results can significantly add to the time required to perform detailed tests on flight hard
3、ware/elements.In this particular event, a minimum amount of pre-planning (i.e. insufficiently defined test requirements) resulted in power quality test implementation at KSC on the ISS Flight Node 1 that required replanning/rescoping the tests “on the fly“ at KSC. Compounding the event was unexpecte
4、d test results from the Russian to American Converter Unit (RACU) that forced the onsite test team along with support personnel from Boeing Canoga Park to perform detailed troubleshooting which further delayed the formal testing progress. Due to the unplanned, excessive time spent on Node 1 Power Qu
5、ality Testing, valuable schedule reserves for the Flight Node 1 were lost. In addition, the NASA if data can be obtained from a load or an individual rack, dont perform the testing on an entire flight element. This accomplishes two things: the performance of the component is established, which in tu
6、rn minimizes the need for sophisticated trouble shooting and debugging of integrated components at the system level.Evidence of Recurrence Control Effectiveness: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-N/ADocuments Related to Lesson: N/AMissi
7、on Directorate(s): a71 Exploration Systemsa71 Sciencea71 Space Operationsa71 Aeronautics ResearchAdditional Key Phrase(s): a71 Configuration Managementa71 Independent Verification and Validationa71 Policy & Planninga71 Research & Developmenta71 Risk Management/Assessmenta71 Safety & Mission Assuranc
8、ea71 Test & Verificationa71 Test ArticleAdditional Info: Approval Info: a71 Approval Date: 2002-08-20a71 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-,-,-
