'Top-down'
cost estimating retains a valuable role even as detailed
'bottom-up' estimating becomes possible and emphasis
switches from forecasting to accountancy and control.
Estimate
Costs
The comprehensiveness
of 'top-down' techniques guards against the chronic
tendency of 'bottom-up' methods to underestimate.
The unque architecture of FACET models makes optimum
use of design characteristics as they emerge with
increasing certainty.
