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  • 11
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    Cost and schedule estimation study report (1993)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This report describes the analysis performed and the findings of a study of the software development cost and schedule estimation models used by the Flight Dynamics Division (FDD), Goddard Space Flight Center. The study analyzes typical FDD projects, focusing primarily on those developed since 1982. The study reconfirms the standard SEL effort estimation model that is based on size adjusted for reuse; however, guidelines for the productivity and growth parameters in the baseline effort model have been updated. The study also produced a schedule prediction model based on empirical data that varies depending on application type. Models for the distribution of effort and schedule by life-cycle phase are also presented. Finally, this report explains how to use these models to plan SEL projects.
    Keywords: COMPUTER PROGRAMMING AND SOFTWARE
    Type: NASA-CR-189344 , SEL-93-002 , NAS 1.26:189344
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 12
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    Software Engineering Laboratory (SEL) cleanroom process model (1991)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The Software Engineering Laboratory (SEL) cleanroom process model is described. The term 'cleanroom' originates in the integrated circuit (IC) production process, where IC's are assembled in dust free 'clean rooms' to prevent the destructive effects of dust. When applying the clean room methodology to the development of software systems, the primary focus is on software defect prevention rather than defect removal. The model is based on data and analysis from previous cleanroom efforts within the SEL and is tailored to serve as a guideline in applying the methodology to future production software efforts. The phases that are part of the process model life cycle from the delivery of requirements to the start of acceptance testing are described. For each defined phase, a set of specific activities is discussed, and the appropriate data flow is described. Pertinent managerial issues, key similarities and differences between the SEL's cleanroom process model and the standard development approach used on SEL projects, and significant lessons learned from prior cleanroom projects are presented. It is intended that the process model described here will be further tailored as additional SEL cleanroom projects are analyzed.
    Keywords: COMPUTER PROGRAMMING AND SOFTWARE
    Type: NASA-TM-105509 , NAS 1.15:105509 , SEL-91-004
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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