Abstract—The concept of Just in Time (JIT) has been studied for more than 20 years, so there are lots of the academic articles and case studies which give the objectives, the backgrounds, the principals, and the techniques of Just in time. The objective of this paper is to gain further knowledge into the JIT/Lean purchasing approach and to identify future research directions. We will concentrate on JIT purchasing and the Lean purchasing, since the JIT purchasing is an important concept of the lean management, therefore in the first part, we will discuss about the JIT purchasing, as well as the advantages and disadvantages of this technique. In the following part, we will focus on the lean purchasing concept to show how the lean purchasing played an important role in the supply chain. 


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