A clear understanding of the functional and physical requirements of a project is essential to ensuring its success because the client's / owner's intent to develop a project is derived from a need, a purpose or mission, and a desired result. When the design of a facility satisfies the emotional, cognitive, and cultural needs of the people who use it and the technical requisites of the programs it houses, the project is functionally successful. The qualities of a functionally efficient building may not even be noticed or recognized, but a poorly functioning building will encounter numerous workflow problems. These problems can be costly to correct, if the opportunity to correct ever becomes available.