Based on studies done by Mentzer et al. (2001), Sohal et al. (2002) and Kotzab et al. (2005), this study categorizes integration level of TSC business processes into four namely Level 1, Level 2, Level 3 and Level 4. In Level 1, integration of TSC business processes occurs within the company; in Level 2, integration of business processes takes place between the company and its suppliers; in Level 3; integration of business processes happens between company and its customers; in Level 4; integration of business processes emerges among suppliers, company and customers.