This model illustrates how to model the churn of customers from one technology to another. Let’s assume an increase in customer numbers for a particular service. This service is supported until Y4 by a Legacy resource. Starting in Y5 a new type of equipment is introduced (Next generation), which supports all additional subscribers and subscribers of expiring Legacy units. The Churn Proportion input defines the share of existing (so far supported by Legacy) subscribers per year that are reallocated to Next generation equipment.
The results show Incremental and Expired Units of the Legacy resource (not affected by the churn) and the Used Capacity for both the Legacy and Next generation resources.