This model illustrates the different Cost types applicable to fixed assets. We look at: Capital Cost, which is depreciated to the Residual Value; Decommissioning Cost, which appears when the resource is taken out of the network; and Maintenance Cost over the lifetime of the resource. Finally, we also examine Churn Cost, which reflects effort driven by customers leaving the network. The results show the driving Customer numbers and the Cost results for a model running in Quarters and Years.