Abstract
Model refactoring enhances the platform-independent design models of software aiming at smoother impact of requirement changes, thereby improving the design quality and assisting in their evolution and maintenance. This study reports a systematic literature review of refactoring techniques particularly in the domain of models of object-oriented software systems. The study used the standard systematic literature review method based on a comprehensive set of 58 articles from a total of 1200 articles published in leading journals, premier conferences, workshops and books. The primary studies were thoroughly analyzed on various aspects of model refactoring process. Identification of methodologies and classification on the basis of model transformation systems, refactoring operations and their application, model behavior specification and preservation, model quality expression, model consistency management and automation of process is reported. This study shows that inadequate model-based approaches for behavior preservation, synchronized model enhancement and empirical evaluation of the proposed refactoring techniques are major obstacles in fully automated model refactoring process.
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