To correctly model a lifecycle you must define the lifecycle and its phases, and then associate your tables to it.
Select Model > Lifecycles (or Database > Information Lifecycle Management > List of Lifecycles) to access the List of Lifecycles, and click the Add a Row tool.
Right-click the model in the Browser, and select New > Lifecycle. Note that lifecycles can only be created at the model level and not within packages.
For age-based lifecycles, you can assign data from an external database to the first phase of your lifecycle and have that data loaded to your warehouse database for the second phase (see Archiving Data From External Databases).
You can also view the detail of the cost savings by year for a single table on the Lifecyle tab of the table property sheet (see Table Properties).