I used to work for the GAMP environment, that means the V-model is obligatory, and I can not contribute to the agile thing. (Although, if you work for a process

I used to work for the GAMP environment, that means the V-model is obligatory, and I can not contribute to the agile thing. (Although, if you work for a process plant, you better are damned agile. The production must go on in any circumstances.) I just want to ask if someone here can elaborate on using pure Kanban? It seems to me a very lean, cheap and flexible tool.