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An Assessment of Space Shuttle Flight Software Development Processes - National Research Council

Effective software is essential to the success and safety of the Space Shuttle, including its crew and its payloads. The on-board software continually monitors and controls critical systems throughout a Space Shuttle flight. At NASA's request, the committee convened to review the agency's flight software development processes and to recommend a number of ways those processes could be improved. This book, the result of the committee's study, evaluates the safety, oversight, and management functions that are implemented currently in the Space Shuttle program to ensure that the software is of the highest quality possible. Numerous recommendations are made regarding safety and management procedures, and a rationale is offered for continuing the Independent Verification and Validation effort that was instituted after the Challenger Accident.

Acronyms and Abbreviations
Figures and Tables
Executive Summaryp. 1
Overview of the Studyp. 19
The Committee's Taskp. 20
Contents of this Reportp. 21
Previous Studiesp. 22
The Flight Software Challengep. 25
Independent Verification and Validation of Critical Softwarep. 29
Orientationp. 30
Scopep. 31
Independencep. 31
IV and V in the Shuttle Programp. 38
The Space Shuttle Flight Software Development Processp. 39
The Space Shuttle Flight Software Verification and Validation Processp. 53
NASA Guidelines and Standardsp. 54
Off-Nominal Casesp. 55
System-Level Software V and Vp. 56
The Independence of IV and Vp. 58
The Silent Safety Program Revisitedp. 61
Software System Safetyp. 63
Software Safety Standardsp. 65
Software Safety Proceduresp. 67
Personnelp. 71
System-Safety Organization Roles and Responsibilitiesp. 72
Organizational Issuesp. 77
Documenting the Processp. 77
Organizational Roles and Responsibilitiesp. 79
Policies, Guidelines, and Enforcementp. 84
Final Thoughts and Future Considerationsp. 87
Gathering the Lessons Learnedp. 87
Contract Reporting Requirementsp. 89
Organizational Learningp. 89
Establishing State-of-the-Art Capabilities Within NASAp. 91
Biographical Sketches of Committee Membersp. 93
Bibliographyp. 95
App. A. Study Participantsp. 101
App. B. Statement of Taskp. 105
App. C. Interim Report of the Committee for Review of Oversight Mechanisms for Space Shuttle Flight Software Processes: Independent Verification and Validation for Space Shuttle Flight Softwarep. 107
App. D. Overview of ASET IV and V Methodologyp. 131
App. E. Flight Software Verification and Validation Requirementsp. 139
Table of Contents provided by Blackwell. All Rights Reserved.

ISBN: 9780309048804
ISBN-10: 030904880X
Audience: Professional
Format: Paperback
Language: English
Number Of Pages: 208
Published: 1st January 1993
Publisher: National Academies Press
Country of Publication: US
Dimensions (cm): 27.9 x 21.6  x 1.91
Weight (kg): 0.59