The start-up phase of an enterprise is a critical stage for the future development, the company is subject to many external forces that can shut-it down or modify it. The start-up phase of an enterprise is a critical stage for the future development, the company is subject to many external forces that can shut-it down or modify it. Nowadays the start-up is an entrepreneurship movement spread all around the world, even though there is friction between project management and start-up, the collective imaginary see the start-up as a fluid organisation , that work in a complete freedom, able to pivot and change Business plan without problem.