Accession Number : ADA334901

Title :   An Investigation into the Use of Software Product Metrics for COBOL Systems

Descriptive Note : Master's Thesis

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH

Personal Author(s) : Boone, Richard E.

PDF Url : ADA334901

Report Date : 21 NOV 1997

Pagination or Media Count : 239

Abstract : This thesis investigated several hypotheses that specific product measures could be used to predict later software lifecycle process or product measures. It collected software product and process measures from four consecutive major releases of a large Cobol legacy system (400K LOC). The types of product measures used were size and specific complexity measures. A statistical software package was used to calculate sample correlation coefficients between the measures. A 95% confidence interval was computed for each sample correlation coefficient that showed a strong or moderate linear correlation. The maintenance process measures provided were manhours used for each program changed or added, and defects detected during each change request. Sample correlation coefficients were derived to see if product measures such as size and complexity could reveal trends that could be used to estimate other software lifecycle measures such as effort or defects. The hypotheses to this research could neither be accepted nor rejected because the process measures collected by the system's owners were recorded at a level too high for sound statistical analysis. Weaknesses are identified in the way these process measures are collected, and suggestions are provided on how process measures can be better identified and recorded.

Descriptors :   *SOFTWARE ENGINEERING, *MEASUREMENT, *COMPUTER PROGRAM VERIFICATION, *METRIC SYSTEM, MAINTENANCE, LINEAR SYSTEMS, STATISTICS, THESES, CORRELATION, COEFFICIENTS, LIFE CYCLES, STATISTICAL ANALYSIS, HYPOTHESES, HIGH LEVEL LANGUAGES.

Subject Categories : Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE