Geoff Stevens and Alan Stretton, Lend Lease Corporation; Michael S. Register, Steven M. Medoff, Mark W. Swartwout and Magnolia Fung, Digital Equipment Corporation
The project early design-stage indicative construction time estimate (Predicte) system is an expert system that is designed to provide indicative construction time estimates of concrete-framed, multistory building projects at the concept or early design stages when relatively little project information is available. Given a preliminary design concept for a multistory building, Predicte returns a listing of the major construction activities required to build the building, the activity duration times, and their start and end dates. In this chapter, we describe the construction time-estimation process and our automation of this process. We discuss the implementation of Predicte and how it was developed, tested, and deployed. We also discuss the maintenance of the system and its business payoff.