Abstract: In this paper,theoretical framework of competitor analysis and interfirm rivalry initially proposed by Ming-Jer Chen is introduced.Its integrative functions to the core problems in corporate strategy research,to both theories of industry based and resources based corporate strategy,and to two synthetic indices market commonality and resource similarity are analyzed.In addition,Chen’s operable method to integration of both indices is discussed.Finally,a case about constructive engineering industry in Guangdong Province is given.

Key words: Integration, competitor analysis, interfirm rivalry