This paper proposes a Lean method for the improvement of the business processes and a partial implementation of this method in the hospital domain, at the Moulay Ismail hospital in Meknes, Morocco.

This paper analyzes 34 Lean methods from different domains in order to identify the steps to follow, the tools to use as well as the principles to check for successful Lean implementation. A semantic analysis of the steps is used to group them into phases. After that, the principles are associated with these phases and the tools are assigned at each stage of these phases.

The Lean method proposed is a multisectoral method and the hospital domain is the subject of the application of this method. The partial application of this method has ensures the commitment of hospital managers and staff.