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  • 1
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    The Impact of Ada and Object-Oriented Design in NASA Goddard's Flight Dynamics Division (1996)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Description: This paper presents the highlights and key findings of 10 years of use and study of Ada and object-oriented design in NASA Goddard's Flight Dynamics Division (FDD). In 1985, the Software Engineering Laboratory (SEL) began investigating how the Ada language might apply to FDD software development projects. Although they began cautiously using Ada on only a few pilot projects, they expected that, if the Ada pilots showed promising results, the FDD would fully transition its entire development organization from FORTRAN to Ada within 10 years. However, 10 years later, the FDD still produced 80 percent of its software in FORTRAN and had begun using C and C++, despite positive results on Ada projects. This paper presents the final results of a SEL study to quantify the impact of Ada in the FDD, to determine why Ada has not flourished, and to recommend future directions regarding Ada. Project trends in both languages are examined as are external factors and cultural issues that affected the infusion of this technology. The detailed results of this study were published in a formal study report in March of 1995. This paper supersedes the preliminary results of this study that were presented at the Eighteenth Annual Software Engineering Workshop in 1993.
    Keywords: Computer Programming and Software
    Type: Software Engineering Laboratory Series: Collected Software Engineering Papers; Volume 14; NASA/TM-1998-208613
    Format: text
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  • 2
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    SEL's Software Process-Improvement Program (1995)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Description: The goals and operations of the Software Engineering Laboratory (SEL) is reviewed. For nearly 20 years the SEL has worked to understand, assess, and improve software and the development process within the production environment of the Flight Dynamics Division (FDD) of NASA's Goddard Space Flight Center. The SEL was established in 1976 with the goals of reducing: (1) the defect rate of delivered software, (2) the cost of software to support flight projects, and (3) the average time to produce mission-support software. After studying over 125 projects of FDD, the results have guided the standards, management practices, technologies, and the training within the division. The results of the studies have been a 75 percent reduction in defects, a 50 percent reduction in cost, and a 25 percent reduction in development time. Over time the goals of SEL have been clarified. The goals are now stated as: (1) Understand baseline processes and product characteristics, (2) Assess improvements that have been incorporated into the development projects, (3) Package and infuse improvements into the standard SEL process. The SEL improvement goal is to demonstrate continual improvement of the software process by carrying out analysis, measurement and feedback to projects with in the FDD environment. The SEL supports the understanding of the process by study of several processes including, the effort distribution, and error detection rates. The SEL assesses and refines the processes. Once the assessment and refinement of a process is completed, the SEL packages the process by capturing the process in standards, tools and training.
    Keywords: Computer Programming and Software
    Type: Software Engineering Laboratory Series: Collected Software Engineering Papers; Volume 13; 2-3-2-7; NASA/TM-1998-208615/VOL13
    Format: text
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  • 3
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    The Improvement Cycle: Analyzing Our Experience (1996)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Description: NASA's Software Engineering Laboratory (SEL), one of the earliest pioneers in the areas of software process improvement and measurement, has had a significant impact on the software business at NASA Goddard. At the heart of the SEL's improvement program is a belief that software products can be improved by optimizing the software engineering process used to develop them and a long-term improvement strategy that facilitates small incremental improvements that accumulate into significant gains. As a result of its efforts, the SEL has incrementally reduced development costs by 60%, decreased error rates by 85%, and reduced cycle time by 25%. In this paper, we analyze the SEL's experiences on three major improvement initiatives to better understand the cyclic nature of the improvement process and to understand why some improvements take much longer than others.
    Keywords: Computer Programming and Software
    Type: Software Engineering Laboratory Series: Proceedings of the Twenty-First Annual Software Engineering Workshop; 3-25; NASA/TM-1998-208617
    Format: text
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  • 4
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    Impact of Ada in the Flight Dynamics Division: Excitement and frustration (1993)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: In 1985, NASA Goddard's Flight Dynamics Division (FDD) began investigating how the Ada language might apply to their software development projects. Although they began cautiously using Ada on only a few pilot projects, they expected that, if the Ada pilots showed promising results, they would fully transition their entire development organization from FORTRAN to Ada within 10 years. However, nearly 9 years later, the FDD still produces 80 percent of its software in FORTRAN, despite positive results on Ada projects. This paper reports preliminary results of an ongoing study, commissioned by the FDD, to quantify the impact of Ada in the FDD, to determine why Ada has not flourished, and to recommend future directions regarding Ada. Project trends in both languages are examined as are external factors and cultural issues that affected the infusion of this technology. This paper is the first public report on the Ada assessment study, which will conclude with a comprehensive final report in mid 1994.
    Keywords: COMPUTER PROGRAMMING AND SOFTWARE
    Type: Proceedings of the Eighteenth Annual Software Engineering Workshop; p 422-448
    Format: application/pdf
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  • 5
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    The Software Engineering Laboratory: An operational software experience factory (1992)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: For 15 years, the Software Engineering Laboratory (SEL) has been carrying out studies and experiments for the purpose of understanding, assessing, and improving software and software processes within a production software development environment at NASA/GSFC. The SEL comprises three major organizations: (1) NASA/GSFC, Flight Dynamics Division; (2) University of Maryland, Department of Computer Science; and (3) Computer Sciences Corporation, Flight Dynamics Technology Group. These organizations have jointly carried out several hundred software studies, producing hundreds of reports, papers, and documents, all of which describe some aspect of the software engineering technology that was analyzed in the flight dynamics environment at NASA. The studies range from small, controlled experiments (such as analyzing the effectiveness of code reading versus that of functional testing) to large, multiple project studies (such as assessing the impacts of Ada on a production environment). The organization's driving goal is to improve the software process continually, so that sustained improvement may be observed in the resulting products. This paper discusses the SEL as a functioning example of an operational software experience factory and summarizes the characteristics of and major lessons learned from 15 years of SEL operations.
    Keywords: COMPUTER PROGRAMMING AND SOFTWARE
    Type: Collected Software Engineering Papers, Volume 10; 12 p
    Format: application/pdf
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  • 6
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    Maximizing reuse: Applying common sense and discipline (1992)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Computer Sciences Corporation (CSC)/System Sciences Division (SSD) has maintained a long-term relationship with NASA/Goddard, providing satellite mission ground-support software and services for 23 years. As a partner in the Software Engineering Laboratory (SEL) since 1976, CSC has worked closely with NASA/Goddard to improve the software engineering process. This paper examines the evolution of reuse programs in this uniquely stable environment and formulates certain recommendations for developing reuse programs as a business strategy and as an integral part of production. It focuses on the management strategy and philosophy that have helped make reuse successful in this environment.
    Keywords: COMPUTER PROGRAMMING AND SOFTWARE
    Type: NASA. Goddard Space Flight Center, Proceedings of the Seventeenth Annual Software Engineering Workshop; 20 p
    Format: application/pdf
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  • 7
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    Closing the loop on improvement: Packaging experience in the Software Engineering Laboratory (1994)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: As part of its award-winning software process improvement program, the Software Engineering Laboratory (SEL) has developed an effective method for packaging organizational best practices based on real project experience into useful handbooks and training courses. This paper shares the SEL's experience over the past 12 years creating and updating software process handbooks and training courses. It provides cost models and guidelines for successful experience packaging derived from SEL experience.
    Keywords: COMPUTER PROGRAMMING AND SOFTWARE
    Type: NASA. Goddard Space Flight Center, Proceedings of the 19th Annual Software Engineering Workshop; p 55-76
    Format: application/pdf
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  • 8
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    Software process improvement in the NASA software engineering laboratory (1994)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The Software Engineering Laboratory (SEL) was established in 1976 for the purpose of studying and measuring software processes with the intent of identifying improvements that could be applied to the production of ground support software within the Flight Dynamics Division (FDD) at the National Aeronautics and Space Administration (NASA)/Goddard Space Flight Center (GSFC). The SEL has three member organizations: NASA/GSFC, the University of Maryland, and Computer Sciences Corporation (CSC). The concept of process improvement within the SEL focuses on the continual understanding of both process and product as well as goal-driven experimentation and analysis of process change within a production environment.
    Keywords: COMPUTER PROGRAMMING AND SOFTWARE
    Type: AD-A289912 , CMU/SEI-94-TR-22 , ESC-TR-94-022
    Format: application/pdf
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  • 9
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    Impact of Ada and object-oriented design in the flight dynamics division at Goddard Space Flight Center (1995)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The Software Engineering Laboratory (SEL) is an organization sponsored by NASA/GSFC and created to investigate the effectiveness of software engineering technologies when applied to the development of applications software. The goals of the SEL are (1) to understand the software development process in the GSFC environment; (2) to measure the effects of various methodologies, tools, and models on this process; and (3) to identify and then to apply successful development practices. The activities, findings, and recommendations of the SEL are recorded in the Software Engineering Laboratory Series, a continuing series of reports that includes this document.
    Keywords: COMPUTER PROGRAMMING AND SOFTWARE
    Type: NASA-CR-189412 , SEL-95-001 , NAS 1.26:189412
    Format: application/pdf
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  • 10
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    Recommended approach to software development, revision 3 (1992)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Guidelines for an organized, disciplined approach to software development that is based on studies conducted by the Software Engineering Laboratory (SEL) since 1976 are presented. It describes methods and practices for each phase of a software development life cycle that starts with requirements definition and ends with acceptance testing. For each defined life cycle phase, guidelines for the development process and its management, and for the products produced and their reviews are presented.
    Keywords: COMPUTER PROGRAMMING AND SOFTWARE
    Type: NASA-CR-189300 , NAS 1.26:189300 , SEL-81-305-REV-3
    Format: application/pdf
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