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This paper describes an investigation into the effects of class couplings on changes made to a commercial C++ application over a period of 212 yr. The Chidamber and Kemerer CBO metric is used to measure class couplings within the application and its limitations are identified. Through an in-depth study of the ripple effects of changes to the source code, practical insight into the nature and extent of software couplings is provided.
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Wilkie et al. (2000) studied this question.
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