We present the process-oriented RAISE contribution, beginning with a short presentation of the RAISE method, tools, and specification language. Then we show how the production cell software is developed using a rigorous approach with successive refinements of the specification. We present extracts from the production cell specifications. Finally, we give an evaluation of the RAISE contribution: the properties that could be specified and proved, the assumptions made, the flexibility of the specifications and proofs and some measures concerning them.