Illustrative project scenario
Assessing Critical Delay on a Highway Infrastructure Project
A worked example of investigating overlapping delay events through programme records, contemporaneous evidence and a defensible methodology.
Highways and civil infrastructure · Delay Analysis · Extension of Time · Project Controls
The situation
A highway package has experienced restricted site access, utility diversions and changes to traffic-management arrangements. Different parties have competing views about which events actually affected completion.
The challenge
An event occurring late does not automatically make it critical. The investigation must distinguish event dates, activity-level consequences, available float, mitigation undertaken and any concurrent causes. Gaps in progress updates increase uncertainty.
A practical approach
Establish the factual chronology
Assemble accepted or operative programmes, progress records, instructions, daily reports, correspondence and change notices.
Test schedule reliability
Examine logic, calendars, status accuracy and material revisions before choosing an analytical method.
Analyse periods of impact
Apply a suitable windows or time-impact approach according to available records and the contractual question, recording assumptions and limitations.
Present findings transparently
Link significant delay conclusions to identifiable programme movements and contemporaneous evidence; set out competing explanations fairly.
Illustrative deliverables
- Evidence chronology and issue register
- Schedule-quality assessment
- Period-by-period delay analysis working papers
- Reasoned report with assumptions, limitations and findings
Key insight: Delay analysis is strongest when the records explain why the completion path moved, not merely when activities finished later than planned.
Key lessons
- Choose methodology to fit the question and available records.
- Distinguish causation from coincidence.
- Record evidential gaps rather than masking uncertainty.