450
Cost Estimating
451
SUBSYSTEM COSTS
During the programming and design of a systems hospital, periodic cost
estimates will have to be made for budget control purposes, more or less
at the same stages as in a conventional project, and more or less to the
equivalent level of detail for each stage. The principal distinction in the
systems case will be the structuring of cost summaries around the specific
subsystems defined by the Prototype Design, as distinct from the more
conventional breakdown along trade and subcontract lines. The function
of this organization of cost data is to allow more effective
cost/performance tradeoffs to occur during detailed design development
by relating each set of targets and estimates to a specific set of building
performance characteristics.
The subdivision of the building into relatively independent service modules
permits the further structuring of cost figures on a per module basis. To a
certain extent, major changes in program or budget during preliminary
planning or detailed design can be handled by the addition or subtraction
of service modules, leaving the rest of the scheme intact, or by
constructing some modules as empty "shells" to be completed as funds
become available.
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