The definition specifies that the first agreement with customer review 3: the definition of the product/thing different from the requirements ever made/capability of the Organization to follow the agreement.
Given that the terms agreed with the customer before you review the three main product specifications / requirements differed from what had been done / capacity of the organization to do the deal or not.
Regulations stated that before the deal with the clients. You review 3 characteristics: product requirements / thing different from requirements ever / capability of the enterprise to do the deal or not.