This study analyzes those critical success factors related to supply chain integration (SCI) and competition capabilities (CC) and which have more effect on business performance (BP) by using a structural equation model. For this purpose, the relationship between integration, CC and BP has been analyzed. Data was obtained from the survey that applied to Turkish Small and Medium Sized Enterprises (SMEs) and we examined the critical factors by using a Structural Equation Model to analyze which factors have more effect on BP. As a result of the study it was found that there are positive associations between SCI and CC, and both SCI-CC and BP and it was also found that most critical factor that affects BP is reliability and the least important one is lower price.