The cycle consists of 4 stages:
Stage 1: Preparation of the request or offer. This refers to the pre-order activities. Whether you go to order the construction of a bridge or request to be paid the telephone bill, there is always pre-order activities. In the case of the bridge to do surveys, calculations, perform feasibility projects, make contributions, etc.. In the case of payment of the account the thing is simple but qualitatively similar. We must find the account, make checks, for whom the pay, etc.. This stage ends when doing the "request or offer.
Stage 2: NEGOTIATION. During this phase down and negotiate the conditions of satisfaction, ie conditions that must be satisfied that the customer is consistent with what we received. This includes the delivery date requested. As Dennis Carey would explain, take care of those conditions that are not expressed but implied in the order. We call this "context of obviousness." (No restaurant will serve cold coffee, though that property is not negotiated when I ask for coffee. If I stand naked on my first day at work I can not tell my boss "we have not agreed that I came to work with clothes, it is obvious I'll come dressed). The negotiation phase ends with the declaration of acceptance "in which client and provider claim to accept the conditions.
Stage 3: EXECUTION. Here the central protagonist is the provider. During this stage the project activities to meet the agreed conditions. Often the provider must make sub-orders, ie, coordinate with others to help. The performance ends with the declaration of compliance. " The supplier says the conditions are fulfilled.
Stage 4: ASSESSMENT AND ASSURANCE: The most neglected stage of all, although of great importance. Here the client evaluated whether to comply with the conditions of satisfaction and provider ensures compliance of the customer asking explicitly stating their satisfaction. I clarify that unless the customer declares satisfaction cycle is not closed. In this case it is possible that the supplier has to make some adjustments, renegotiate, in short. The cycle of action can only end with the "statement of satisfaction" which makes the client.