The lean-production "pull" technique has been shown to improve performance of a construction process. It is particularly well-suited for fast-track projects that require assembly of unique parts and that are plagued by uncertainties. Such projects are difficult to schedule accurately and in detail in advance. The nature of the anticipated matching problems must determine the complexity and detail required of the planning system. As uncertainties manifest themselves during project execution, the pre-construction schedule will have to be adjusted in a flexible manner for field work to progress efficiently and for work-inprogress inventories to remain small.