Abstract
This paper reports the results of a field study of the relationship of information flow to the maintainability of COBOL modules in a data processing environment. The study, which considers 238 modules from three different organizations, examines the correlation of information flow metrics and subjective maintainability ratings. Results of the study show that, for the environments included in the study, information flow does have significant correlation with maintainability, and information flow metrics can be used effectively to help identify modules with low (poor) maintainability.
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