A TIA can be prepared contemporaneously during the project to support an EOT request, or reviewed later as part of an EOT determination or dispute. In either case it should be transparent and reproducible.
TIAs are often disputed because of the update selected, the fragnet logic, or the progress data used. We prepare and review TIAs so that each of these choices is explained and supported.
A credible TIA depends on using the right update, modelling the event realistically, and explaining why the inserted impact is reasonable. We do not rely on generic software outputs in isolation. Instead, we combine schedule mechanics, project records, and contractual context so the result is understandable and robust.
A disciplined prospective method for evaluating delay events against the current accepted schedule
Identify the relevant accepted programme update, status date, calendars, critical path, and programme assumptions.
Review instructions, notices, RFIs, design releases, procurement issues, access constraints, and event chronology.
Model the delay event using realistic relationships, durations, constraints, and resource-driven sequencing where justified.
Integrate the fragnet into the update closest to the event and measure the effect on completion, milestones, and float.
Evaluate whether the event affected the critical path, concurrent issues, excusable delay, and extension implications.
Issue a transparent narrative, schedules, assumptions, and outputs suitable for project teams and dispute forums.
We also explain the assumptions behind the selected update, fragnet structure, progress status, and any limitations in the available records. That transparency is important because many TIA disputes turn not on software operation, but on whether the model reasonably reflects the real event and the accepted programme at the time.
Core elements usually expected in independent construction expert reporting
Define the question, scope, and assumptions.
Show the records and data relied upon.
Explain how the analysis was performed.
Set out the material results and observations.
State the conclusion clearly and independently.
Most challenges to a TIA concern a small number of modelling choices. We check each of them when preparing or reviewing an analysis.
confirm the update used reflects progress immediately before the event.
check actual dates and remaining durations in the update are reliable.
test whether the event logic and durations are supported by the records.
identify contractor delays affecting the same path in the same period.
consider available float, resequencing, and mitigation actually taken.
Where appropriate, Solvix can also coordinate TIA findings with wider delay analysis, EOT assessment, disruption review, contractual entitlement review, and quantum support so clients receive one coherent position rather than isolated technical outputs.
A TIA is a prospective delay analysis method used to test how a specific event affects the current accepted programme by inserting a fragnet or impact model into the schedule update closest to the event.
It is commonly used for extension of time assessments, live project claim administration, responses to submitted EOT claims, and contemporaneous decision-making before a dispute matures.
No. TIA addresses the schedule effect of an event. Contractual entitlement still depends on the wording of the contract, notice compliance, causation, concurrency issues, and other project facts.
Yes. We can review the selected update, fragnet logic, assumptions, status data, and interpretation used by another party, then identify strengths, weaknesses, and alternative views.
Yes. TIA often forms part of a wider package that may include EOT assessment, forensic schedule analysis, claims support, expert reports, or arbitration and litigation support.
TIA is usually prospective and contemporaneous, testing the expected impact of a live event on the current programme. Forensic schedule analysis is often retrospective and is commonly used after events have unfolded.
Yes. A well-explained TIA can help parties narrow disagreements about schedule impact, milestone movement, and the scale of time relief before matters proceed to more formal dispute stages.
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