You are planner using Primavera. Have you ever used more than one resource curves (front loaded, back loaded and other curves) in a single plan? Why?

Yes. I am using more than one resource curves to enable me to specify how I want resource units or cost prepared over the duration of an activity. Resource units and costs are distributed evenly during an activity unless we are going to specify non-linear distribution using other curves. 

The need of different types of resource curves is to accurately map the resource requirements of the project on a time scale.

For Example : if a RCC wall is to be constructed and is identified with a single activity, which includes Rebar work, Shuttering and Conc. Pouring, and the total duration is spread over a period of days, it is practical to assign Majority of steel fixers on the first7 days and Carpenters over6 to days and then when the wall is to be poured Concrete mixer and pump can be on the last t day.

Also when there is a physical progress measurement system, sometimes Separate resources are created for measuring physical progress; sometimes as numbers of columns etc. This resource should be fully back loaded in the plan. so as not to affect the SPI of the project while executing.

Also there are times when some monetary resources are to be spent on a particular day of an activity, this needs to have a separate curve as required by the conditions.

Regards

Activities in a plan may need different resources to be deployed in specific duration. Also, some activities are to be front loaded or back loaded depending upon the resource availability and in order to optimise resources, the activities have to be suitably scheduled. Using different resource curves for different activities in the same plan is a feature that helped planners accurately plan and deploy resources. 

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