"The Solution to the Start to Start and Finish to Finish Lag Drag Problem" By Raphael M. Dua, FAICD, FAPE, MACS, PCP, Grad DISC
Introduction
At the 2006 PMI COS conference a paper entitled “Scheduling 101: A “Behind – the – Scenes” Look at Basic Schedule Calculation was presented by Scott W Cramer, James L Jenkins, and Joseph J Orczyk. In the paper they present a “Comparison between AON and PDM”, in which they make a case for using Precedence Diagram Method for overlapping tasks using three basic construction tasks. They then demonstrate the process of overlapping the three PDM tasks and how the critical path computations are calculated.