Hi, any bodies help on this,

1. I hve to load BOQ cost each activiey in the same way i hve to incorpoate labour,Material, Plant and machenaries and OH cost.

Then diff between Monthly Invoice Vs Cost Expentiture.

Cash flows and man power projection.

Regards

Suresh.S

Jowell,

Can be because non critical activities are ahead of schedule while critical path is delayed.

Take a look at the following figure, it shows the Baseline and Current [Actualization left of DD with revised Projection at right of DD]. Vertical red line represents DD.

Because of the slow progress of activity A the remaining Duration increased to account for delayed remaining work. Activity 9 and 10 RD was revised to be 1/2 initial estimate due to actual progress of other similar activities. Schedules are Dynamic and actualization shall reflect true actual projections. Could have left their RD equal as per Baseline OD but wanted to take the opportunity to take this point as very frequently client reject changes in plans as if plans are static.

If you are measuring progress based on BOQ it might be that actual BOQ progress is ahead but projected end of job is late it can also be that actual BOQ progress is behind but end of job is projected to be early. Progress S Curves even if shown the complete set; Baseline Early, Baseline Late, Actual Progress up to DD, Projected Early Progress after DD and Projected Late Progress after DD tells you where you are and what are the projections at a given time but cannot tell you exactly why.

Best Regards,

Rafael

I do not know what scheduling software was used to manage the Big Dig, but it was a disaster. I bet a lot of significant amount of information was produced. A lot of information, too much as to distract and prevent the users to keep perspective.

In contrast the Empire State building was done in record time and on budget, most probably because managers concentrated not on quantity of cost data but on keeping perspective. It was done prior to CPM becoming into existence.

At home many of us keep perspective by using best fit software for different functions. We do not insist on keeping all under the same database. We prefer to plan our jobs using our software of choice and prefer to control costs via our accounting software job costing module.

Unfortunately some clients with the help of some developers have hijacked the ultimate purpose of the CPM tool, to produce good schedule models and to manage resources efficiently.

We are frequently forced to use tools that speak a foreign language to the construction contractor, that are very poor at managing resources, so bad are some of these tools that the response has been to plan without efficient resource leveling. Just ask any rookie scheduler what is the ultimate purpose of the resource leveling tool and the majority will say "to produce feasible schedules". But feasible schedules are not necessarily good schedules, you got to account for idle resources and by changing resource availability below real availability you can produce better schedules, much better if the resource algorithms are more efficient. Also some of these tools lack for variable assignments forcing the Project Managers to manually assign idle resources, but manual is usually inefficient and time consuming.

There is no such thing in management as one size fits all, forcing the contractor to use tools that are poor at resource management under the excuse of monstrous database on a single tool that is a "Jack of all Trades - master on none"  does not make any good to the industry.

BR,

Rafael

Just keep in mind that;

From: http://www.nflaace.org/index_files/john_orr_cost_loaded_schedule_updatin...

During the course of construction, resource or cost drivers can make CPM schedule calculations invalid. Unpaid remnants of activities in progress (paid to 97% and holding) can distort the schedule by increasing “out-ofsequence” reporting. Schedule updates must provide valid projections of completion in order to support the management team.

....

Another negative result of payments withheld below 100% is the affect on the record-keeping purpose of the schedule, particularly important in a time impact delay evaluation or dispute resolution. A schedule activity cannot have an actual finish date assigned until it has been statused as 100% complete (schedule, not necessarily cost.) An as-built schedule file with large numbers of activities that were progressed to 97% with then no further progress for several update cycles before reaching 100%, indicates that work was continuing throughout and that comparison between original durations and actual durations will be invalid.

....

Another approach is to:

• Cost load your schedule to get early and late BOQ payment projections.
• Progress the job as suggested, treat an activity as complete, 100% schedule completion and an accurate Actual Finish date, when it has reached the point where all its successors can begin. This without making cost adjustments.
• Submit Payment Requests from a separate worksheet and ignore minor differences.

In this way we get accurate application for payment and an accurate schedule progress with the exception of BOQ progress as shown on the CPM which will be a little bit above actual (as shown on the worksheet).  The difference is usually so small that for practical purposes it is negligible. Because BOQ projections have an early and late curve and at times it happen that progress falls outside the two limits we therefore are not that picky. Anyway it is not uncommon for owners to look for any excuse to delay payments adding to the inaccuracy of the projections. Such granularity we consider useless, even the previously proposed method on the reference we consider a waste of time. We consider such stupid requirement as a dirty trick to delay payments, not a lack of understanding on their part that such granularity adds no real value.

Keep the reference for the case where the contract and owner are so picky as to require this waste of time.

At home even when Spanish speaking KISS stands for Keep It Simple STUPID.

Good Luck.

Hi

you may have a look at this blog post.

http://www.plannertuts.com/primavera-p6-tutorials/link-the-schedule-to-t...

regards

mimoune