A preliminary study of Ada expansion ratios

  • Authors:
  • James V. Chelini;Edmund B. Hudson;Stephen M. Reidy

  • Affiliations:
  • Advanced Project Research Group, Central Software Engineering Branch, GTE Strategic Systems Division, Westborough, MA;Advanced Project Research Group, Central Software Engineering Branch, GTE Strategic Systems Division, Westborough, MA;Advanced Project Research Group, Central Software Engineering Branch, GTE Strategic Systems Division, Westborough, MA

  • Venue:
  • ACM SIGSOFT Software Engineering Notes
  • Year:
  • 1986

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Abstract

Since the mandate (DoDD 5001.31) requiring the use of the Ada language in all mission critical software, a need for revised expansion ratios for estimating Ada software has emerged. This paper describes a study to determine a set of preliminary Ada expansion ratios. Three classes of Ada programming features were identified during this study. These classes are based on the use of Ada specific constructs within the software modules. Each of the classes identified, also has a corresponding expansion ratio. These ratios are used to determine memory requirements which are input to cost estimation models such as COCOMO and SLIM [1].The results of this research will have direct bearing on future Ada projects by helping to develop improved software costing and sizing estimates. This will lead to improved reliability on design requirements for program memory and execution timing specifications. A special note on the effect of timing and complier optimization is also included in this paper.