Lean Manufacturing has become one of the pillars of modern industry. For that, many manufacturing companies are implementing this Japanese approach; whose main objective is to minimize their costs and maximize their profits. Among these manufacturing companies, small and medium-sized enterprises (SMEs), which have the same objectives. However, many companies apply Lean Manufacturing, without prior studies, which lead in most cases to several problems.

It is in this context, the aim of our paper is to study the critical success factors (CSFs) during the implementation of Lean Manufacturing in enterprises, especially in SMEs. Therefore the chance of successful Lean implementation is improved and evaluated before its implementation.