This paper uses a survey-based methodology to examine the performance impact of Just-In-Time (JIT) purchasing strategies. Over the past decade much has been written concerning JIT philosophies; however, relatively little empirical research has been conducted that evaluates the impact of JTT on performance. Similarly, little work has been performed to evaluate the role of JIT in global competitive strategies. This paper uses contingency theory's environment-strategy-performance relationship to consider vital issues—planning, organizational support, and implementation status—affecting the success of JIT purchasing strategies. The findings suggest that JIT purchasing strategies represent an appropriate response to global competition and that JIT purchasing can have a significant positive impact on performance improvement when adequate planning and support are in place.