Metrics for maintainability of class inheritance hierarchies

TLDR

Since the proposal of the six object‑oriented metrics by Chidamber and Kemerer (1994), studies have validated them and uncovered deficiencies, prompting the development of many new metrics for object‑oriented systems. We focus on metrics of class inheritance hierarchies for design and maintenance. We propose two simple, heuristic metrics that extend Chidamber and Kemerer (1994) and Li (1998) to assess understandability and modifiability of class inheritance hierarchies. Our comparisons demonstrate advantages over Chidamber and Kemerer (1994) and Henderson‑Sellers (1996) metrics in maintaining class inheritance hierarchies. © 2002 John Wiley & Sons, Ltd.

Abstract

Abstract Since the proposal for the six object‐oriented metrics by Chidamber and Kemerer (1994), several studies have been conducted to validate their metrics and have discovered some deficiencies. Consequently, many new metrics for object‐oriented systems have been proposed. Among the various measurements of object‐oriented characteristics, we focus on the metrics of class inheritance hierarchies in design and maintenance. As such, we propose two simple and heuristic metrics for the class inheritance hierarchy for the maintenance of object‐oriented software. In this paper we investigate the work of Chidamber and Kemerer (1994) and Li (1998), and extend their work to apply specifically to the maintenance of a class inheritance hierarchy. In doing so, we suggest new metrics for understandability and modifiability of a class inheritance hierarchy. The main contribution here includes the various comparisons that we have made. We discuss the advantages over Chidamber and Kemerer's (1994) metrics and Henderson‐Sellers's (1996) metrics in the context of maintaining class inheritance hierarchies. Copyright © 2002 John Wiley & Sons, Ltd.