This study examines the impact of manufacturing flexibility factors) integration, supplier management strategy, and supplier selection strategy( on business performance. For this purpose, the relationship between integration (corporate strategy, technology, customer, and supplier integration), supplier management strategy (supplier early involvement, quality roadmap, and technology roadmap), and supplier selection strategy (technology, quality, cost and delivery) on business performance were examined using a conceptual model. The data were collected from both automobile and the ceramic tile industries by survey approach. To analyze collected data, step wise regression approach and spss software was employed. The results indicated that in these two industries, significant effects of integration more than the other two variables and supplier management strategy more than the supplier selection strategy on business performance.