“…Eley [12] "......future expectations of the organization and its users......design/ build which uses the concept, akin to product provision, of fitness for purpose" Clift & Butler [13] "....denote the physical performance characteristics of a building functioning as a whole and of its parts" William [9] A building's ability to contribute to fulfilling the functions of its intended use. McDougall et al [3] ...the measurement involves the efficiency and effectiveness of an action. Efficiency and effectiveness relate, as concepts, to Best Practice (efficiency) -the pursuit of perfection of a given approach, and Best Value (effectiveness) -the pursuit of the most economic (in the widest sense) approach Khalil [1] An accomplishment, fulfilment, and achievement of a building in meeting the emergence objectives Woods [14] A set of measured responses of the building, as a system, to anticipated and actual forcing functions…”