International audiencePurpose – This article deals with the subject of "Lean Normalization". A comprehensive methodology is proposed which combines the benefits of both ISO standards and Lean Management. The application of this methodology leads manufacturing or service companies to certification without creating more documentation. It guarantees agility and flexibility in the day-today management of the company, and induces lower costs and reduced times. This methodology provides a new way of tackling the implementation of ISO Standards in a company. Design/methodology/approach – This methodology is based on the synergistic combination of both ISO Standards (Quality Management System) and the key concepts of Lean Management. After a short presentation of ISO Standards and Lean Management, the possibility of implementing a synergy between these two different approaches will be discussed. At this point ISO 9001 standard will be focused on. The proposed methodology will be introduced step-by-step. Each step of the model will be formalized using the SADT graphic representation tool. Moreover, each step is associated with a key concept of Lean Management. In order to illustrate the proposed method, an example of implementation will also be presented. Findings – To show the feasibility of this methodology, this article finishes with a summary of the results achieved in a company and draws some interesting conclusions. Companies have the possibility of achieving certification in combination with a Lean Quality Management System: a one-page Quality Manual, only ten records, no major non-conformities and no customer complaints over a two-year period. Research limitations/implications – The methodology may have to be adapted to better suit the needs of companies seeking to implement the latest version of the ISO 9001 standard. Practical implications – This paper presents the deployment of ISO 9001 standard whilst simultaneously respecting key Lean Management concepts. The practical results for enterprises are the implementation of a Lean Quality Management System leading to a certification. Originality/value – Due to its simplicity and the relevance of its steps, the proposed methodology can be applied to companies with a guaranteed success of certification