Journal of E-Technology Mohamed Amine CHAÂBANE, Lotfi BOUZGU 2 2 2011 http://www.dline.info/jet/fulltext/v2n2/3.pdf Business process flexibility now becomes a crucial research area. In the current study we provide a Versioned Business Process meta-Model (VBP-M for short) for describing flexible business processes. This meta-model is organized around five perspectives (functional, process,informational, organizational and operation). Second, it proposes a language to define, manipulate and query the business process versions conforming to the proposed VBP meta-model. Finally, this paper shows an overview of the VerFlexFlow tool that we propose to validate our contributions.