Abstract
The purpose of this research is to investigate the effect of supply chain integration level on business performance. For this purpose, data were collected from the top 500 manufacturing companies (ICI 500) announced by the Istanbul Chamber of Industry each year, and their integration and performance levels were measured. Data were obtained from 127 production enterprises. As a result of Pearson Correlation and multiple linear regression analyses, it was found that the customer and supplier integration level of enterprises had a positive and significant effect on business performance. However, the level of internal integration does not have a substantial impact on business performance. Moreover, it was found that the impact of customer integration on business performance was higher than that of supplier integration. According to the results, enterprises should improve their integration by establishing long-term collaborations in their supply chains to increase their performance. Besides, this study contributes to the holistic view of the supply chains of enterprises, especially the understanding of the high positive effect of customer integration on business performance.