Separate proration for a minimum benefit
QUESTION: My benefit formula is: BASICBFT #max MINBFT. How can I use different proration methods when the benefit is BASICBFT and when the benefit is MINBFT?
ANSWER: First, create two Benefit Definitions with the appropriate proration methods selected for attribution of a pension or OPEB Benefit Definition. Then change the Benefit formula(s) to:
for the Benefit Definition with the proration method when the benefit is BASICBFT:
(BASICBFT > MINBFT) * BASICBFT, which returns BASICBFT when it exceeds MINBFT, zero otherwise; and
for the Benefit Definition with the proration method when the benefit is MINBFT:
(BASICBFT <= MINBFT) * MINBFT, which returns MINBFT when it exceeds BASICBFT, zero otherwise.
Note: If the attribution method under the unit credit or projected unit credit cost methods is accrual rate proration, then, once BASICBFT exceeds MINBFT, the attribution of the MINBFT component is unchanged from its attribution at the last decrement date at which MINBFT exceeded BASICBFT.