There is no single technique that fits every delayed project. The appropriate delay analysis methods depend on the question being answered, the quality of the schedules, the timing of the analysis, and the records available. A method that works well with reliable periodic updates may be less suitable when the project record is incomplete.
Our work on construction delay analysis in Los Angeles begins with the evidence rather than a preferred result. The HPM delay analysis service reviews project documents, schedule sequence, changes, and timing before selecting an approach that can reasonably explain cause and effect.
As-Planned Versus As-Built Analysis
This approach compares planned performance with what actually occurred to identify differences in sequence and timing. It can be useful when the baseline and as-built information are sufficiently reliable, but the analyst still has to determine which differences affected completion. AACE Recommended Practice 29R-03 cautions that forensic methods involve professional judgment and should be selected in light of the available project information.
Window-Based Analysis
Window analysis divides the project into periods so the analyst can examine how the critical path and delay conditions changed over time. This can be useful on complex projects where different activities controlled completion at different stages. A scheduling delay and analysis expert witness should be able to explain why the chosen windows, data dates, and schedule updates are appropriate for the issues being studied.
Method selection also depends on the reliability of the source schedules. Missing updates, extensive out-of-sequence work, unexplained logic changes, or inaccurate actual dates can limit what an analyst can infer from the schedule file alone. In those cases, daily reports, meeting minutes, correspondence, and other project records may be needed to validate or reconstruct the sequence before a method is applied. A technically sophisticated method cannot compensate for unreliable inputs, so validating the record is part of the analysis rather than a separate administrative task.
How CPM Supports Delay Evaluation
Critical path method scheduling models the relationships among activities and helps identify which sequence controls the project finish at a given time. The GSA construction scheduling requirements provide an example of CPM schedules being used for planning, coordination, progress evaluation, criticality, float, and analysis of schedule impacts. The model still depends on reasonable activity logic and reliable updates.
Choosing an Analysis That Can Be Explained Clearly
At HPM Consultants, we use recognized delay-analysis approaches and project records to address the specific schedule question in dispute. A construction delay analyst in San Diego may need to compare several possible techniques before settling on the method that best fits the available evidence, and our resources on delay analysis provide additional educational material.
Method selection matters because the analysis must remain understandable when assumptions and conclusions are challenged. When a matter requires a construction scheduling expert witness in Los Angeles, contact our team to discuss the schedules, updates, and records available.