Abstract
The clinical laboratory is described as a system with an enquiry component or demand side, where control of test utilization is the mandate of the clinical physician or surgeon, and a production component or supply side, where answers to clinical questions are generated and control of test data production is the mandate of the laboratory physician.
Supply side unit costs are maintained by increased production effectiveness brought about by the judicious manipulation of supply costs; labor costs; and capital expenditures for automated equipment, robots, and information technologies. The pathologist's prime role as controller of the supply side is outlined, as are the clinical physician's prime role and pathologist's subsidiary role in control of test use on the demand side.