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Variation Analysis & Forensic Scheduling

Projects may experience variations in Scope, Time, or Cost. Such variations may be triggered by issues in charter, design, contract, timeline & budgeting, quality, communication, or any other factor.This study of the causes & effects of variations in a project can be understood as Variation Analysis.

At Stoneboy, we use industry best practices to identify causal relationships between trigger events, and their effects on a project. All such trigger events, and their corresponding effects are identified, assigned – and the responsibility is assigned for all such trigger events, and effects.

The study of variations in Scope is known as Scope Variation Analysis (SVA), while the study of variations in Time (i.e delays or acceleration) is known as Time Variation Analysis (TVA). For Cost, the study of variations is known as Cost Variation Analysis (CVA).

 

Time Variation Analysis (TVA) is also commonly known as Schedule Delay Analysis, and Impact Analysis. TVA identifies the root cause of delay(s) in construction projects, the value of delay, and the effect on the overall project schedule. Forensic Scheduling is the identification of a project’s past variations, ongoing variations, or upcoming variations.

TVA can be performed as:

Retrospective

Sum up the effects of past variations on the project’s schedule

Contemporaneous

Report the ongoing variations, and their effects on the project’s schedule

Prospective

Predicting the effects of future variations on the project’s schedule

TVA is an analytical process which is performed alongside a study of project’s documents & data from the field, as well as the head office. The selection of Analysis Methodology is usually one of the first major decisions at the start of the TVA.

Analysis Methodology is a technical method utilized by forensic scheduling specialists to identify the delay and the cause(s) of that delay on contract milestones, as well as other key dates. By doing so, contractual culpability and liability for the delay can be established.

The selection of the Analysis Methodology depends on the variety of factors and the available records. Choosing the most suitable method of variation analysis for evaluating a particular construction delay is critical in assessing the cause and impact of a given delay. The five most common methodologies used in Variation Analysis are the following:

The five most common methodologies used in
Variation Analysis are the following:
  • Time Impact Analysis (TIA)
  • Windows Method (also, Contemporaneous Period Analysis)
  • Collapsed As-Built (CAB)
  • Impacted As-Planned (IAP)
  • As-Built vs. As-Planned (ABAP)

Drawing on our deep industry expertise, our team provides superior Variation Analysis. For the TVA, some of our techniques include:

  • Contract Analysis
  • Entitlement Analysis
  • Causation
  • Assessment of Delay, or Acceleration
  • Quantification of Disruption
  • Quantification of Loss of Productivity
  • Preparation of as-built schedule from project documents & data
  • Development of Re-configured Schedule Baseline
  • Analysis methodologies including Time Impact Analysis (TIA), Windows Method, Collapsed As-Built (CAB), Impacted As-Planned (IAP), and As-Built vs As-Planned (ABAP)
  • Critical Path Analysis, Longest Path Analysis, Concurrent Delay Analysis, Float Analysis
  • Earned Value Analysis, S Curve Analysis
  • PERT / Monte Carlo Simulation
  • Linear Schedules
  • Analysis on changes in updated schedule versus baseline schedule

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