REG NASA-LLIS-0195-1992 Lessons Learned - Orbiter Software Upgrades .pdf

1、Lessons Learned Entry: 0195Lesson Info:a71 Lesson Number: 0195a71 Lesson Date: 1992-11-04a71 Submitting Organization: KSCa71 Submitted by: David PenningtonSubject: Orbiter Software Upgrades. Description of Driving Event: The movement of some requests for software upgrades to crew procedures is a mat

2、ter of serious concern. The crew already has a very large number of procedures with which to be familiar. Adding to that load, particularly with items that could be handled easily with greater reliability and safety by software, does not seem wise. Procedures such as “do not touch the keyboard for X

3、 seconds after the occurrence of event Y“ can be handled easily by software. If such procedures are contingencies that are employed infrequently, the chance of error when they are needed rises.A review of all computer-related procedures to ascertain whether or not there is significant potential for

4、design-induced human errors should be mounted. This review should include crew representatives, experts on human factors, and members of safety and mission quality organization.Lesson(s) Learned: The replacement of requested software upgrades with crew procedures is of great concern especially since

5、 software offers greater reliability & safety.Recommendation(s): Review all crew procedures that might be performed by the computer to determine if doing them manually is better than by software.Evidence of Recurrence Control Effectiveness: N/AProvided by IHSNot for ResaleNo reproduction or networki

6、ng permitted without license from IHS-,-,-Documents Related to Lesson: N/AMission Directorate(s): a71 Space Operationsa71 Exploration SystemsAdditional Key Phrase(s): a71 Flight Operationsa71 Flight Equipmenta71 Human Factorsa71 SoftwareAdditional Info: Approval Info: a71 Approval Date: 1994-06-06a71 Approval Name: James G. Klinea71 Approval Organization: KSC/HEIa71 Approval Phone Number: 407-867-7614Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-