16 Nov Contractual Weight Values and S-Curves
Khonopc has recently been tasked to check the Schedule and its progress reports on an EPC Project. The Client had quested to have the Schedule resource/cost loaded. The Contractor’s Planner added some names and roles in the resource tab and the Client planner approved it. Less than a month later, both Client and Contractor realised that the progress report produced and calculated through P6 did not seem correct. We were thereafter requested to assist in resolving the issue!
We have seen this issue on many Projects, so it is worthwhile to demonstrate through this article.
1- The Client or contractor wants to have a resource /cost loaded Schedule
2- The Client or contractor wants to see the roll up progresses (plan and actual) in the planning software (P6).
3- The contractor’s planner does the resource / cost loading (rightly or incorrectly). After the Schedule approval, it gets used for progress reporting!
4- Obviously the software uses the input data for the calculations. Therefore, whether the Project team knows what weight values are used or not, the software will roll up the progresses!
Up to this step, there might not be any issue. The problem comes when there is a set of contractual (or instructed) weight values which the Client had instructed the Contractor to utilise on the software! It should be noted that, if resource loading was correctly done, the S-Curves would be accurate as well!
5- The client requests the following weight values to be applied in the Schedule.
6- How is the Contractor’s Planner supposed to apply the Client’s weight values in the Schedule? There would be no choice other than manipulating and changing the assigned budgeted units/cost to meet the Client’s request!?
7- As a result of changing the budgeted units/costs, the S-Curves of the E, P, C, C and overall will be changed!
8- When a S-Curve is wrong, what would happen to the Project’s completion and delivery?
When a Client enforces a set of weight values which are different from the cost/effort based weight value, it will be impossible to have the correct resource/cost loading and the Client’s weight values in the schedule! In this scenario, the progress calculation should be done outside the scheduling software. Otherwise the budgeted Unit/Cost will be wrong as well as the S-Curves!
Contact us for more detail: info@khonopc.com
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