This practical guide introduces readers to the Capability Maturity Model (CMM) for software development. Written in French, it explains the core concepts of the model, walks through the five maturity levels, and offers concrete steps for assessing and improving an organization’s software processes. The book combines theoretical background with hands‑on advice, making it useful for project managers, quality‑assurance professionals, and developers who want to align their work with industry‑standard best practices. With clear examples and checklists, the text serves as a concise reference for anyone seeking to implement or evaluate CMM in a real‑world setting.