Feature

Construction Delay Analysis, Automated

Delay analysis is the forensic examination of a construction project schedule to identify the causes, effects, and responsibility for schedule delays. Constroma automates the most rigorous delay analysis methods — Time Impact Analysis (TIA), Windows Analysis (MIP 3.7), and Collapsed As-Built — so you can produce defensible results in hours instead of weeks.

Automated Time Impact Analysis

Time Impact Analysis (TIA) is the gold standard for forensic schedule analysis. It works by inserting a fragnet — a fragment network of delay activities — into the CPM schedule at the point when the delay event occurred, then recalculating the critical path to measure the impact.

Constroma automates both prospective TIA (analyzing future impact at the time of the delay) and retrospective TIA (analyzing historical impact after the fact). The platform handles fragnet insertion, CPM recalculation, critical path comparison, and impact quantification automatically for each delay event within your defined analysis windows.

Windows Analysis (MIP 3.7)

The Modelled-in-Windows methodology divides the project timeline into analysis windows — typically aligned with schedule updates — and evaluates delay events within each window chronologically. This approach captures critical path shifts, concurrent delays, and pacing delays that simpler methods miss.

Constroma implements MIP 3.7 as an automated workflow: define your windows (or let the platform create them from your schedule updates), assign delay events to windows, and run the analysis. The engine processes each window sequentially, inserting fragnets, running CPM, and producing per-window and cumulative delay results.

Critical Path & Float Analysis

Every delay analysis depends on accurate critical path identification. Constroma runs full CPM forward and backward pass calculations on your imported P6 schedules, identifying the critical path, near-critical activities, total float, and free float. As delay fragnets are inserted, the platform tracks how the critical path shifts and which activities become critical or lose float.

From Delay Analysis to EOT Claims

Delay analysis is only part of the claims process. Constroma connects your analysis results directly to extension of time (EOT) claims, linking each delay event to its schedule impact, supporting documentation, and financial quantification. The platform maintains full traceability from raw schedule data through to the final claim narrative.

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Frequently Asked Questions

What is delay analysis in construction?
Delay analysis is the process of determining the causes, effects, and responsibility for schedule delays on a construction project. It involves comparing planned schedules against actual progress, identifying critical path delays, and quantifying the impact of each delay event. Common methods include Time Impact Analysis (TIA), Windows Analysis, Collapsed As-Built, and As-Planned vs As-Built comparison.
What is Time Impact Analysis (TIA)?
Time Impact Analysis (TIA) is a forensic schedule analysis method that evaluates the impact of each delay event by inserting a fragnet (fragment network of activities) into the CPM schedule at the point in time when the delay occurred. Constroma automates both prospective and retrospective TIA, calculating the critical path impact of each delay event within defined analysis windows.
What is the MIP 3.7 Windows Analysis methodology?
MIP 3.7 refers to Methodology Implementation Protocol 3.7, which is a retrospective Time Impact Analysis performed within defined analysis windows. The schedule is analyzed window by window, with delay fragnets inserted chronologically within each window. This method provides the most accurate and defensible delay analysis because it accounts for concurrent delays and critical path shifts over time.
How does Constroma automate delay analysis?
Constroma automates delay analysis by importing your P6 XER schedule files, allowing you to define delay events with fragnets, and running CPM calculations automatically within each analysis window. The platform traces critical path impacts, identifies concurrent delays, calculates float consumption, and produces audit-ready reports — reducing weeks of manual work to hours.
What schedule formats does Constroma support?
Constroma natively supports Primavera P6 XER files for schedule import and export. XER files are imported with full fidelity including activities, relationships, calendars, resources, and WBS hierarchy. Exported files are CP1252-encoded and compatible with P6 for reimport.
Is Constroma compliant with AACE RP 29R-03?
Yes. Constroma implements delay analysis methods described in AACE International Recommended Practice 29R-03, "Forensic Schedule Analysis." The platform supports observational (contemporaneous), retrospective, and modelled methodologies including Time Impact Analysis, Windows Analysis, and Collapsed As-Built analysis.