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Requirements analysis notebook for the flight data systems definition in the Real-Time Systems Engineering Laboratory (RSEL)A hybrid requirements analysis methodology was developed, based on the practices actually used in developing a Space Generic Open Avionics Architecture. During the development of this avionics architecture, a method of analysis able to effectively define the requirements for this space avionics architecture was developed. In this methodology, external interfaces and relationships are defined, a static analysis resulting in a static avionics model was developed, operating concepts for simulating the requirements were put together, and a dynamic analysis of the execution needs for the dynamic model operation was planned. The systems engineering approach was used to perform a top down modified structured analysis of a generic space avionics system and to convert actual program results into generic requirements. CASE tools were used to model the analyzed system and automatically generate specifications describing the model's requirements. Lessons learned in the use of CASE tools, the architecture, and the design of the Space Generic Avionics model were established, and a methodology notebook was prepared for NASA. The weaknesses of standard real-time methodologies for practicing systems engineering, such as Structured Analysis and Object Oriented Analysis, were identified.
Document ID
19930001772
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Wray, Richard B.
(Lockheed Engineering and Sciences Co. Houston, TX, United States)
Date Acquired
September 6, 2013
Publication Date
December 1, 1991
Subject Category
Spacecraft Instrumentation
Report/Patent Number
NASA-CR-185698
LESC-29702
NAS 1.26:185698
Report Number: NASA-CR-185698
Report Number: LESC-29702
Report Number: NAS 1.26:185698
Accession Number
93N10960
Funding Number(s)
CONTRACT_GRANT: NAS9-17900
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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