Quantity on Allocation modelled consumable resources

Use this modelling type when you know the quantity of the resource that you have to model:

Select Quantity On Allocation in the Modelling type field.
Select a Calculated Parameter and Balancing Parameter from the Parameters group. The calculated parameter is the information that you want Asta Powerproject to calculate; the balancing parameter is the information that you want Asta Powerproject to change automatically if the duration of a task to which the resource is allocated is amended in the bar chart. Setting a balancing parameter of None creates a fixed resource allocation that does not change if the task duration changes.
Enter the number of resources that you want to assign by default in the Quantity field.
Enter the default consumption or supply rate of the resource in the Consumption Rate field.
Select the default rate type that you want to use (Units Per Time Unit or Time Units Per Unit) in the Rate Type field.
Enter the default duration for which the resource works in the Duration field. Either the Quantity, Consumption Rate or Duration field is disabled, depending on the selected calculated parameter.

For example, a task may require 1200 metres of network cable to be consumed in 10 days. Select Rate as the calculated parameter, and Asta Powerproject will calculate that the metres of cable have to be consumed at the rate of 120 metres per day.

If you reduce the task duration from 10 days to 8 days, the resource allocation is adjusted according to the selected balancing parameter:

When Rate is selected, the consumption rate increases from 120 metres to 150 metres per day. As the resource allocation duration is shorter, the cable must be consumed more quickly to complete the task in less time.
When Quantity is selected, the allocation reduces from 1200 to 960 metres of cable. As the consumption rate has stayed the same but less time is available to complete the task, fewer metres of cable can be consumed in the time available.