Delays are an inherent challenge in construction projects, arising from factors suchas design changes, resource shortages, and unforeseen events. To effectively address these delays, two primary methods of delay analysis are utilized: prospective analysis and retrospective analysis. These approaches differ in timing, purpose, data requirements, and outcomes. This article explores their advantages, disadvantages, and relevance in construction project management, supported by insights from the SCL Protocol and AACE Recommended Practices.
Prospective analysis is particularly useful during ongoing projects, especially for addressing straightforward delays or meeting contractually required forecasts.
Methods of Prospective Analysis
Impacted As-Planned (IAP): Adds delay events to the baseline schedule to evaluate their potential impact. Best for simpler, early-stage delays.
Time Impact Analysis (TIA): Incorporates delay event subnetworks into the baseline program and recalculates impacts. Ideal for evolving, long-duration projects.
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