Each billing method limitations to use in implementation
Cost/Cost: Accrues revenue and bills using the ratio of actual cost to budgeted cost (percent complete)
Cost/Event : Accrues revenue using the ratio of actual cost to budgeted cost (percent complete) and bills based on events
Cost/Work: Accrues revenue using the ratio of actual cost to budgeted cost (percent complete) and bills as work occurs
Event/Event : Accrues revenue and bills based on events
Event/Work: Accrues revenue based on events and bills as work occurs
Work/Event: Accrues revenue as work occurs and bills based on events