1、Lessons Learned Entry: 1127Lesson Info:a71 Lesson Number: 1127a71 Lesson Date: 1999-02-01a71 Submitting Organization: HQa71 Submitted by: David M. LengyelSubject: Computer Hardware-Software/Checkout and Launch Control System (CLCS) Description of Driving Event: Potential Unauthorized Access to Check
2、out and Launch Control System (CLCS)Lesson(s) Learned: Present plans depend on human procedures to achieve lockout to prevent inadvertent or unauthorized access to actual hardware when using the new Checkout and Launch Control System (CLCS).Recommendation(s): NASA should use a computerized authoriza
3、tion to achieve lockout of commands to actual hardware from anyone not authorized to issue such a command in CLCS.Evidence of Recurrence Control Effectiveness: NASA concurs with the ASAP recommendation. The CLCS Project will undertake a study with the Shuttle engineering community to determine how t
4、hese lockouts could be implemented. The results will include a preliminary set of requirements for CLCS and other systems, such as the Shuttle Data Center and Simulation Systems, an operational risk assessment for implementing these changes, and a rough order of magnitude cost assessment for impleme
5、nting these changes. The study will be completed in a timely manner so that implementation can be accomplished in time to avoid extensive revalidation of CLCS application software. Progress reports will be presented to the ASAP during their CLCS review meetings.Documents Related to Lesson: Provided
6、by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-N/AMission Directorate(s): a71 Space Operationsa71 Exploration SystemsAdditional Key Phrase(s): a71 Aerospace Safety Advisory Panela71 Computersa71 Policy & Planninga71 Risk Management/Assessmenta71 Securitya71 SoftwareAdditional Info: Approval Info: a71 Approval Date: 2002-02-25a71 Approval Name: Bill Loewya71 Approval Organization: HQa71 Approval Phone Number: 202-358-0528Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
