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(PS-3082) Float Consumption and Resiliency Theory Put into Practice

Level: Intermediate
Venue: 2019 AACE International Conference & Expo, June 16-19, 2019, New Orleans, LA, USA

Abstract: A frequent source of disagreement between owner and contractor is the quantification of delay using an additive time impact analysis such as that described in Recommended Practice 52R-06. Owners are hesitant to grant time extension when they believe a contractor can revise Resource Driven Logic (RDL) to partially or fully mitigate the impact of a delay. While most project management teams can successfully use this method early in a project, they often run out of mitigation options as the job progresses.

The 2018 Technical Paper PS-2871: A Realistic Look at Float Consumption, introduced and explored several metrics for identifying Schedule Resiliency, a measure of how readily a Critical Path Method (CPM) schedule can be adjusted to accommodate delay. PS-2871 explored the theory using one example project.

This paper will further explore the concepts of average Relationship Free Float (RFF) on RDL, activity free float density factor, and Schedule Performance Index (SPI) correlation. The goal of this research is to reduce time impact disputes using resiliency metrics to identify that point in a project when “free” mitigation through adjustments to RDL is no longer feasible.