1. A system for comparing an original real estate space and a proposed real estate space comprising: a. a workstation; b. a server in communication with the workstation, said server having software and memory storage which permits a user to enter an efficiency measure directed to a loss in usable space for a building of the original real estate space, a space program for the original real estate space, an efficiency measure directed to a loss in usable space for a building of the proposed real estate space and a space program for the proposed real estate space, said software using the space program for the original real estate space to calculate a circulation loss for each room of the space program by: i) for a room having an area greater than or equal to a user specified area size, calculating a corresponding circulation loss using a user specified aisle width and the area of the room: ii) for a room having an area less than the user specified area size, calculating a corresponding circulation loss using a user specified number of individual workstations for a workstation cluster, the user specified aisle width and the area of the room; and to calculate a total circulation loss based on a total of the circulation losses for each room of the space program for the original real estate space and the space program for the proposed real estate space to calculate a circulation loss for each room of the space program by: i) for a room having an area greater than or equal to a user specified area size, calculating a corresponding circulation loss using a user specified aisle width and the area of the room: ii) for a room having an area less than the user specified area size, calculating a corresponding circulation loss using a user specified number of individual workstations for a workstation cluster, the user specified aisle width and the area of the room; and to calculate a total circulation loss based on a total of the circulation losses for each room of the space program for the proposed real estate space, and said software calculating inefficiency measures of the original real estate space compared to the proposed real estate space based on the building efficiency measures, space programs and total circulation losses for the original and proposed real estate spaces, said inefficiency measures including a programming inefficiency, a building inefficiency and a space plan inefficiency.