An Arithmetic Calculation performs the mathematical operations required to determine the percentage of the year during which the worker is employed and apply that percentage to the full annual accrual. A typical design divides the remaining eligible days in the year by the total number of days in the year and multiplies the resulting percentage by the annual accrual amount.
A Logic Calculation returns true or false using AND or OR conditions; it cannot independently calculate the prorated numeric amount. A Date Increment/Decrement Calculation adds or subtracts a defined number of days, months, or years from a date and returns another date. It may support date derivation but does not produce the required percentage. A Constant Value Calculation always returns the same value and cannot vary according to hire date.
Workday provides delivered arithmetic proration calculations for mid-period hires, and similar arithmetic components can be used to construct annual proration. The final result must use the time off plan's unit of time. Appropriate rounding should also be configured where the calculated result could contain fractional hours or days.
Study Guide reference: Calculations for Time Off Plans - Arithmetic Calculations and Proration .