Delay Analysis Techniques (DATs)

Delay Analysis Techniques (DATs)

1. Delay in Construction Projects

   • Causes of Delay
     • Defective Installation
     • Labour Productivity
     • Inclement Weather
     • Inaccurate Programming
   • Effects of Delay
     • Delay Claim (Compensation)
       • Disputes & Litigation
       • Mutually Resolved Claims
     • Time Implications
       • Longer Project = Longer Overheads
     • Cost Implications
       • Longer Project = Greater Overheads
     • Quality Implications
       • Rushed Completion = More defects

2. Existing DATs

   • As-Planned vs. As-Built Method
     • Most commonly used DAT
       • Considered unreliable and inaccurate, not recommended for use
   • Impacted As-Planned Method
     • Simple, doesn't require As-Built Programme
       • Major limitations: failure to address changes to critical path of programme
   • Collapsed As-Built Method
     • Includes all Delays on as-built schedule
       • Considered reliable for use in court/dispute (such as BCIPA)
   • Time Impact Method
     • Most Complex DAT
       • Widespread consensus that it is the most reliable DAT available

3. Obstacles Preventing DAT Usage

   • Lack of Familiarities with the Techniques
     • Indicates Need for Greater Awareness & Training
   • High Cost and Time Associated With Use
     • Simple, inaccurate methods cost less and are therefore favoured
   • Programming without CPM Network
     • PREVENTS use of Accurate DATS
   • Inadequate Project Records
     • Limits use of Accurate DATs

4. Factors Affecting DAT Selection

   • Most Important
     • Records Availability
       • Indicates better record keeping = more advanced DAT selection = less dispute
     • Type of Baseline Programme
       • Indicates a uniform programme style should be recommended
     • Reason for DA
     • Cost of Project
   • Least Important
     • Skills of Analyst
     • The Amount in Dispute
     • Number of Delaying Evenes

5. Awareness & Usage of DATs

   • High Awareness & Usage
     • As-Planned vs. As-Built
     • Impacted As-Planned
   • Low Awareness & Usage
     • Time Impact Method
     • Collapsed As-Built Method