A simple milestone phase model for developing product innovations. The aim of the model is to ensure the process quality. Each stage of the model is composed of interdepartmental activities and ends with a milestone analysis.
The stage-gate process comprises the following stages: Idea generation, idea screening (Gate 0), feasibility study (Gate 1), concept development (Gate 2), detailed development (Gate 3), testing and validation (Gate 4), market launch (Gate 5) and the post-launch review.