How is the "Planned Payback Period" field calculated?
Release : All Supported Releases
Component : CA PPM SAAS PORTFOLIO MANAGEMENT
Planned Payback period calculates from the first planned expenditure and not the beginning of the cost plan.
See more details below defined on techdocs at: Determine the Financial Metrics for Planning:
Note: If the planned cost exceeds the planned benefit amount, the Payback period and Breakeven dates will be blank. See Planned Breakeven and Planned Payback Period Fields empty in Financial Summary page for more details.
Reference KB: Searching for known Clarity Issues using Self Service