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Window Analysis method - Difference between Impacted schedule and Updated schedule

2 replies [Last post]
Haresh Jayanth
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Joined: 24 Aug 2006
Posts: 219

Window analysis technique;

As a common practice in Window analysis, delay events are inserted in the impacted schedule and then determined the impact of delay events on project completion for that particular window period. Then progress is being updated , till the end of window period to notice delays , and report the shift in project completion at the end of window span considered. 

My questions;

Can the Contractor change relationships , lag , duration  ,in the updated programme based on the Site conditions. If it is yes...Let me give another example.

The Contractor has delay for a initial peirod of one year. In the first window of analysis, which is after a year , contractors demonstrates there is no delay in the project completion, by reducing the lag, duration and changing the relationship type. However, as per the approved baseline program the Contractors is culpable of 100 calendar days of delay.

Contractor demonstrates that he has mitigated this delay.  

However, in the next window period , Contractor demonstrates delays, at the time period of Employers culpable delay event and then claiming for extension of time. The Contractor also demonstrates that, he was not able to mitigate due Employers delay.

Is this claim logical???

 

Replies

Darrin Kinney
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Joined: 1 Dec 2016
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This is an odd question because the method of windows analysis does not specifically require the insertion of delay events. It is entirely an obsevational method. In your narrative, if out of sequence work or mitigation work occured in your "window" then you simply document it and how it changed from the inital window slice. That is the entire point of windows analysis. It highlights the continual changes to program and can very accurately define what the critical slippages were for each period. Your narrative and chronology will need to support your conclusions as to liabiltiy.

 

I suspect your main concerns are about prospective future changes impacting the analysis. That is absolutely vital to understand and is the primary reason why clients will reject your claim until the end of the project. As Mike Testro says, "actual performance will establish what the delays are". 

Mike Testro
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Joined: 14 Dec 2005
Posts: 4418

Hi Haresh

The contractor can change his  sequence of work and planned durations at any time during the progress of the works.

The programme is entirely theoretical. Actual performance will establish what the delays are.

Best regards

Mike Testro