Analyzing Delay Events

Replies to This Discussion

Permalink Reply by Francisco Fernandez on September 14, 2008 at 2:45pm

Your query about the delaying event gives a hint that the planned logic was not followed as sequenced. If that delaying event is a part of or within a work package, then it calls for a revision of it's logic based on actual done hence changing links for predecessor/successor. However this could only be practically done if the underlying path for the delaying event has simple links. But in a complex dependancies, it calls for a broader analysis beyond the work package involved. Make a dummy copy of that project and perform trials by revising appropriate linkage and see what effect is there on milestones and target completion date.

Permalink Reply by Suraini on September 15, 2008 at 8:08am

Francisco, Thanks. Could you email me any sample that you have done so that I m be able to follow what you just explain.
Thanks

Permalink Reply by Jun Gallardo on September 16, 2008 at 11:49pm

Mr. Suraini,
This is also one of my dilemmas as a Planning Engr. here in Dubai, I end up revising our schedule as per site condition with the approval of course by the Planning Engr. (Client side). Basically, preliminary schedules are created with limited informations and resources. As construction progresses, innovations and method statements are introduced which are at times contradicting with our planning experiences (in my point of view). My opinion... if your activities are out-of-sequence, discuss with the consultant for revision. Regards.

Permalink Reply by Stephen Agyei on September 17, 2008 at 4:41am

Suraini,
I suppose you wanted to use the as-planned -v- as-built methodology in your analysis, and you cannot superimpose the as-built onto the as-planned. - Is that correct?

If my assumption is correct, then i would have suggested the as-planned impacted technique. However because you said the sequence was varied, that renders the above technique unuseful.
So what you may consider using is the collapsed as-built.
What you do is to break down the as-built programme and remove all the delay events from the programme and that will give you the date you would have completed the Works but for the delays.
The weakness of the collapsed as-built though is that where there is concurrent delays, it only removes the compensable delays and not the culpable delays. If such weakness will be significant, then you may consider time-impact or windows analysis. These alternatives are tedious and more expensive but produce highly accurate report.

Hope this helps, good luck.
Stephen.

Permalink Reply by Suraini on September 17, 2008 at 7:54am

Stephen, thanks for the advice. Your assumption is pretty correct. However, what do you meant by collapsed as-built. I do have the updated status schedule on mthly basis but the updated exercise was stopped as the and the work was completed after some period.

Do you referred the as-built schedule? How actually the work was executed at site? Appreciate your elaboration on the approach you have just mentioned.

Regards

Permalink Reply by Suraini on September 17, 2008 at 8:02am

Hi, Jun,
Thanks for the reply. Could you further elaborate how you correct the out of sequence activities in the baseline which have been approved earlier. The Client is not wanting to change the approved baseline cause it will disrupt the total float of each activities in the schedule.

Do you do that with your client? Is the client accept the changes. Do you called such changes as change and how you mitigate that there is no delay or do consider that as delay has occurred.
Appreciate your further clarification on your approach.
Regards

Permalink Reply by Jun Gallardo on September 17, 2008 at 11:34pm

Mr. Suraini,
My apology. I misunderstood your question. Baseline Sched. can only be revised via CO. Regards.

Permalink Reply by Wilson I. Villarey on September 18, 2008 at 11:28am

This is a very good topic and most of the time as Planners we encounter such a delay on schedule. Later on I will share with you regarding delay analysis. Hope I can contribute on this topic. Regards, Wilson

Permalink Reply by James Santos on September 20, 2008 at 1:04am

Hi Suraini!

May I just ask, what types of relationship you are usually using in preparing you're schedule?

Permalink Reply by Suraini on September 21, 2008 at 4:06am

Hi Santos,
I like to use FS relationship with lag or lead duration. As this would allow good representation of logical sequencing when we run the analysis. Unfortunately, most of the activities are not executed in accordance to the plan. This has cause the logical sequencing out of sequence and becoming irrelevant. Moreover, they push the end date further behind which the management do not like it. I am a believer of a good-realistic-logical plan would lead to the correct estimation of the end date. Unfortunately, my project director is not in the same believer like I do. So, there are so many imposed dates which make the schedule no representative anymore....

Permalink Reply by Stephen Agyei on September 22, 2008 at 4:07am

Suraini,

Sorry i took so long responding to your query. I have not been to this site since my last response, that is why.
Anyway, back to your query.

Ordinarily, if there are no delays or disruptions, the Works are supposed to be completed within the contract duration irrespective of following the as planned logic judiciously or not.
What the collapsed as-built does is that is looks at how the works were actually built on site and then remove all delay events (compensable delays) from the sequence and the results will be when the works would have been completed 'but for' the compensable delay events. Mathematically the difference between the actualn completeion date and the date without the delay events will be the entitlement of EoT. You can do this on activity by activity basis or on the entire project. The caution on activity by activity basis is that there are a number of case laws which suggest that EoT should only be given if the delay events cause the end date to prolong. Therefore if an acivity date is prolonged but due to floats or whatever the end date does not move, there may be no entitlement to EoT. The SCL Protocol has a different viet though. You can refer to the Protocol for further details.

Regards,
Stephen.

Permalink Reply by Suraini on November 27, 2009 at 2:05am

Hi Stephen,
What is the SCL Protocol?

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