Using the Number of Workdays for the Calculation
A planner wishes to roughly estimate the daily average production rate necessary to meet demand. He uses this macro to divide monthly demand by the number of workdays in each month. He can therefore assess whether his forecasts are feasible given normal production rate/capacities of the plant(s).
Another scenario in which this macro might be used is as follows: POS data from the past is available to the planner. The planner would like to compare average forecasted daily sales (which will be made on workdays only) with previous average daily sales.