1、Lessons Learned Entry: 0482Lesson Info:a71 Lesson Number: 0482a71 Lesson Date: 1996-11-07a71 Submitting Organization: GSFCa71 Submitted by: Laura J. MilamSubject: Test Delays Due to Late Set-up of Instrument Ground Support Equipment (GSE) Description of Driving Event: During laboratory system level
2、integration and testing for a GSFC satellite at a contractors facility, testing was delayed or reordered because of problems with the Instrument GSE. The Instrument teams arrived the same day that the testing was to start, and when the GSE was hooked up, there were problems. The ensuing troubleshoot
3、ing process caused delays in the start of testing. In some instances, the test procedure was reordered to workaround the problem.Lesson(s) Learned: Allowing Instrument teams to arrive with their GSE just prior to testing can cause delays. Meanwhile, the clock is ticking and the marching army costs m
4、ount. The process of tearing down GSE and relocating the racks of equipment can cause unexpected failures and anomalies.Recommendation(s): When scheduling I&T activities, allow adequate margin for Instrument teams to arrive, unpack and test their GSE. These activities should be completed in parallel
5、 with other activities and should be line items on the I&T schedules. Less complicated GSE needs at least a full day for setup and test. For more complicated set-ups allow at least 2 or 3 days. Instrument teams should allow for this extra time in their travel budgets. Make actual measurements for ca
6、ble lengths from Spacecraft GSE locations to the Instrument GSE locations, and put measurements in an approved document such as an ICD. Allow extra length in cabling in case of location change.Evidence of Recurrence Control Effectiveness: N/AProvided by IHSNot for ResaleNo reproduction or networking
7、 permitted without license from IHS-,-,-Documents Related to Lesson: N/AMission Directorate(s): N/AAdditional Key Phrase(s): a71 Administration/Organizationa71 Policy & Planninga71 Test & VerificationAdditional Info: Approval Info: a71 Approval Date: 1996-11-13a71 Approval Name: John W. Remeza71 Approval Organization: 302a71 Approval Phone Number: 301-286-7113Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
