To get Aware IM to calculate the value of an attribute of a business object you have to define a business rule that will perform the required calculation. The rule should be attached to the business object that owns the calculated attribute. See the “Adding/Editing Business Rules” section in the Aware IM User Guide.

In addition you can check the “Calculated” property of the attribute. This will make sure that the attribute is read-only on the forms of the business object. See the “Adding/Editing Attributes” section in the Aware IM User Guide.

For example, if you want to define an attribute called NumberOfLineItems in the PurchaseOrder object, you can define the business rule as follows:

If PurchaseOrder.MyLineItems WAS CHANGED Then 
    PurchaseOrder.NumberOfLineItems = COUNT OrderLineItem WHERE 
    OrderLineItem IN PurchaseOrder.MyLineItems