ABSTRACT
In the United States, there are essentially three kinds of income producing properties: residential, commercial and retail. Of these three, commercial and retail properties already operate on the basis of technical levels in accord with decision levels. In both, it is conventional for base buildings to be financed and built without determining the distribution of occupancy, and over time to be "fitted-out" by occupants according to their preferences and desired level of investment. This division enables a long-term investment (the base building) to remain useful because it can be incrementally altered one-unit-at-a-time without degrading other occupancies or the base building. Further, the base building can be improved while minimizing and localizing the impacts on individual occupants.
