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Competitiveness is considered as a key criterion for appraising the success degree of countries, industries and enterprises in the political, economical and commercial competition fields. Research findings show that competitiveness has been discussed in three levels of national, industry and enterprise (organization or company). Among all the enterprise level seems to more considerable. In this study enterprise competitiveness has been viewed from two main perspectives: construct and behavioral. According to construct perspective, competitiveness includes two groups of factors which are composing and affecting factors. Based on behavioral perspective an enterprise faces two types of factors in its decisions and actions which are strategic and operational factors. As a result of literature review, summarization and complementary edition, totally 28 factors has been identified as competitiveness factors ({16 composing f. and 12 affecting f.} and {15 strategic f. and 13 operational f.}). The questionnaire has been developed based on these factors. The findings show that in Iran business environment, all competitiveness factors of enterprises are highly important but very weak.