1、Lessons Learned Entry: 1059Lesson Info:a71 Lesson Number: 1059a71 Lesson Date: 1998-02-01a71 Submitting Organization: HQa71 Submitted by: David M. LengyelSubject: International Space Station (ISS) Program/Computer Hardware-Software/Checkout and Launch Control System (CLCS) Description of Driving Eve
2、nt: Independent Verification and Validation (IV&V) of Checkout and Launch Control System (CLCS)Lesson(s) Learned: The Checkout and Launch Control System (CLCS) program at KSC has not been provided with funding for Independent Verification and Validation (IV&V) that is safety critical for a software
3、effort of this size.Recommendation(s): The Checkout and Launch Control System (CLCS) should be provided with adequate funding for software IV&V. Evidence of Recurrence Control Effectiveness: KSC concurs with the ASAP recommendation relative to IV&V funding for the CLCS Project. A Memorandum of Agree
4、ment (MOA) was signed on May 5, 1998, between the Software IV&V Facility and KSC, for the performance application of IV&V techniques and methods to the CLCS software. The scope of this memorandum will include performing IV&V on selected catastrophic/critical/high risk CLCS software components. The s
5、elected software components will consist of CLCS system software. The specific areas to be analyzed will be system redundancy, command support, data distribution and processing, constraint management, and the safing system related software. The software related to safing includes the Emergency Safin
6、g System and those control logic modules associated with safing (some of which may reside within application software). The Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-analysis will consist of requirements, design, code, and test analysis, as app
7、licable for the life cycle of the software being analyzed. The application interfaces with the system software will also be analyzed. In addition, the IV&V Facility will perform system level analysis of the system test plan and system tests performed along with software engineering and integration a
8、nalysis of the CLCS system as a whole. This MOA is effective from May 1, 1998, until September 30, 2000. The work identified in this MOA will require a staffing level of about 16 full time equivalents (FTEs). This staffing level will be comprised of 15 FTEs from the IV&V contractor located at the IV
9、&V Facility and at KSC. The remaining one FTE will be a civil service personnel. Staffing at KSC will be comprised of eight contractor FTEs with the remainder residing at the Fairmont Facility. The Space Shuttle Program has agreed to fund this effort at $4.5M over the life of the MOA.Documents Relat
10、ed to Lesson: N/AMission Directorate(s): a71 Space Operationsa71 Exploration SystemsAdditional Key Phrase(s): a71 Aerospace Safety Advisory Panela71 Financial Managementa71 Hardwarea71 Information Technology/Systemsa71 Launch Processa71 Policy & Planninga71 Research & Developmenta71 Risk Management/
11、Assessmenta71 Safety & Mission Assurancea71 Softwarea71 Test & VerificationAdditional Info: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Approval Info: a71 Approval Date: 2001-12-14a71 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-,-,-
