To keep track of all schedule versions, revisions and periodical updates that will be used to analyze delays, regardless of the after-the-fact delay analysis method used, it is highly recommended that all documents and records used in preparing schedules are properly documented and associated with their relevant schedule.
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Those schedules could be available in an electronic format to can be used by the delay analysis team, when converted from earlier Primavera P6 versions (sometimes from P3), converted from other applications like MS Project, created from bar charts and project records or created from scratch. The as-planned schedule, final as-built CPM schedule, all periodic updates and schedule delay analyses needed for the Window Analysis and Time Impact Analysis (TIA) methods, will usually be completed using Primavera P6 software. Regardless, of the selected delay analysis method, the team carrying out the delay analysis needs to have access to the as-planned schedule, final as-built CPM schedule with periodic updates, Project daily reports, meeting minutes and other project’s records that are related to the different schedule delay and disruption events. Each method has its own advantages and disadvantages that is usually driven by the quality and availability of baseline schedule, schedule delays, progress and project documents, level of effort to be spent on the delay analysis among others. Collapsed As-Planned, Window Analysis and Time Impact Analysis. To prove the contractor entitlement for delay, there are a number of after-the-fact delay analysis methods that can be used. For example, in the FIDIC Red Book, those include the clauses of Ambiguities (5.2), Engineering Drawings Delays (6.2 and 6.3), Physical Conditions (12.2), Fossils, Antiquities, Structures (27.1), Tests (36.5), Suspension (40.2), Employer’s Failure to Give Possession (42.2) and Defaults by Employer (69). The events that entitle the contractor to delay claims are normally specified in a contract provision. Those are the delays that are beyond the contractor’s control. Thank you for your time to read this article.On construction projects, schedule delay claims that affect the project completion date are becoming a common event. So we can have the Time Impact Analysis report like this: Other 21 days were absorbed by available float. We have 1 delay (28 days) from Owner in Garage Doors but it only affect 7 days in the critical path.
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We have 1 delay from Contractor in “Garage Walls” but it was not on the critical path. As long as the delay is within available float there is no effect on the final completion date. So 14 days charge to owner, and 7 day charge to contractor We have delay (21 days) on Excavation due to Unforseen site conditionĪnd those are concurrent delay.
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We have a simple project with the Planned schedule like this: Meanwhile, non-excusable delays are delays that the contractor or party affected will need to bear the responsibility. A Time Impact Analysis is a method used to determine extent of impact from potential delay in construction process. This schedule analysis method involves the insertion or addition of activities indicating delays or changes into an updated schedule representing progress up to the point when a delay event occurred to determine the impact of those delay activities.ĭelays can be categorized in two main areas:Įxcusable delays occur when the affected party is allowed to claim for a time extension, compensation or both.