Grandfathering & Legacy Plan Management — Keeping existing customers on retired plans and prices after the catalog moves on — deliberately, with a tracked end state. Legacy plans must keep rating and invoicing correctly for years, and contraction analytics should count what that generosity costs.
Grandfathering & Legacy Plan Management lives in the Pricing Lifecycle Ops phase of Grow Revenue — the stage where you retain, expand, and compound revenue on the platform. In the corpus tool index this phase maps to the Billing and CPQcategories.
The critical requirements that test this capability in UsagePricing's Usage-based billing & metering rubric — scored tool profiles link from the list below.
How fast can you ship a pricing change safely?
The bar: Versioned catalog, dry-run/simulation against live data, and grandfathering controls — pricing changes ship like code.