Paraphrase ''An estimate is basically an "estimate" or a rough, educated guess as to how much a job MIGHT cost. It is often offered before you have all the details of a particular job (for example, on the first call to a potential new client) or during a visit. A bid (or offer) would be a fixed price for a service to be provided. As such, once accepted by the client, it is fixed, but also CANNOT be changed (unless the client changes the amount/type of services required or reveals something beyond what was agreed upon).Organizations use the capacity planning method to estimate their productivity to meet the changing demands of their products. Capacity planning estimates how much production capacity is needed to meet changing product demand. Capacity refers to the amount of work that can be done in project management and production within a given time. In capacity planning, planning capacity refers to the firm's maximum ability to complete tasks within a certain period of time. A special case of capacity planning, planning capacity is the firm's maximum ability to perform a certain amount of work in a certain period of time