What is the basic process of the whole consulting process of management consulting company?

I learned about the consultation process of a management consulting company in official website, which was consulted by CUHK. As mentioned above, the basic consulting procedure of management consulting companies includes four stages: (1) contact stage: through negotiation, it is clear whether the consulting subject and the consulting object are willing to cooperate. (2) Preparatory consultation stage: through a quick and comprehensive investigation of key issues of customers, jointly determine the consultation theme and sign the consultation agreement. (3) Formal consultation stage: through in-depth investigation and analysis, judge the problems and causes in various disciplines, put forward systematic and feasible improvement plans, and make necessary ideological and organizational preparations for the implementation of the plan. (4) Scheme implementation stage: helping the client enterprises to implement the improvement scheme, and the whole consultation work has achieved results. The above four stages are the basic procedures for the consulting process of management consulting companies.