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In shorter delays this may not be as challenging.
#Delay analysis in primavera p6 pdf full
However, most project owners are hesitant to grant time extensions until the full extent of the delay is known. The AACE document for prospective TIA preparations, 52R-06, details a recommended protocol for preparing Time Impact Analyses using a forward-looking approach. Common Problems with Contract Specified Delay Analyses (MIP 3.6 and MIP 3.7) The result is an analysis that, when prepared correctly, is relatively simple to calculate and, just as importantly, easy to defend.
#Delay analysis in primavera p6 pdf how to
It is equally significant to note that the Analysis will demonstrate how to select which schedule to use for the analysis to minimize manipulation. The Analysis identifies delay including mitigation and acceleration quantities, identifies concurrency, and accounts for changes in the critical path.
#Delay analysis in primavera p6 pdf windows
In the following paragraphs the Fixed Perspective Windows Delay Analysis (“Analysis”) method will be presented, which incorporates the strengths of certain retrospective, observational and additive methods while minimizing, if not alleviating the weaknesses. Delay analysis methods that rely on and incorporate this available schedule data will be consistently more reliable and accurate. Contemporaneously prepared schedule information is available more often. With increased experience and participation schedules are increasingly more consistent and accurate. More projects require monthly updates, more project staff are involved in the scheduling process, and more stakeholders provide input into the scheduling process.
However, as construction scheduling requirements and specifications have become more stringent over the last few decades, it is possible to minimize these manipulations. In addition, this methodology is similar to that which is outlined in the AACE document for prospective TIA preparations, 52R-06, with the notable exception that actual dates of the delay be used, retrospectively.Īs will be detailed in the enclosed analysis, these referenced methodologies can be easily manipulated to reach biased results. This method is virtually identical to that outlined in the AACE’s 29R-03 MIP 3.7. Many, if not most, contract specifications that address preparation of time impact analyses are specifying a method that generally aligns with the method outlined by the Society of Construction Law. The analyst can then determine the impact of the delay by measuring the impact to the prior completion date. In this method time impact analysis preparation includes the insertion of a delay activity into the sequence of unimpacted activities in a schedule prior to the delay event. The “Time Impact Analysis” is the method recommended within the Society of Construction Law Delay and Disruption Protocol.
#Delay analysis in primavera p6 pdf series
Each analysis method has strengths and weaknesses with a series of validation requirements, so proper application of the various methods is essential to a reliable conclusion. With the variety of Delay Analysis Techniques available to schedule reviewers and analysts, it can be difficult to identify and implement the most reliable and effective way of demonstrating an accurate impact calculation caused by delay in retrospect. The result is an analysis that, when prepared correctly, is simple to calculate and easy to defend. In the following paragraphs the Fixed Perspective Windows Delay Analysis (“Analysis”) method will be presented, which incorporates the strengths of various retrospective methods, while minimizing, if not alleviating the weaknesses. While each methodology may have its appropriate implementation, certain methodologies can be combined to produce a more reliable and accurate result. Several of the AACE International’s Recommended Practices (29R-03) are commonly labeled as “Time Impact Analysis”. The broad application of the term “Time Impact Analysis” can lead to significant variances in delay calculations. Contractual requirements for time extension requests using the common term, “Time Impact Analysis”, are increasingly appearing throughout the construction industry.
Perfecting the Fixed Perspective Windows Delay AnalysisĪbstract – With the variety of Delay Analysis Techniques available to schedule reviewers and analysts, it is difficult to know and implement the most reliable and effective way of demonstrating an accurate impact calculation caused by delay.