Calculating the Average Daily Requirements
Implementation Options
The system uses the calculation of the average daily requirements as the basis for calculating the dynamic safety stock.
Prerequisites
In Customizing for MRP, you have defined the parameters for calculating the average daily requirements in the range of coverage profile itself using the IMG activity Define range of coverage profile (Dynamic safety stock). The individual parameters are:
The periods are calendar periods, that is, the system calculates them from the calendar start of the period. A weekly period, for example, is calculated from Monday to Sunday and a month is calculated from the first calendar day to the last calendar day of the month.
The system defines workdays using the factory calendar.
The system defines calendar days using the Gregorian calendar.
You can specify, for example, that 20 days are to be used for the calculation of the monthly average.
Process Flow
The system takes into account all requirements in the current period, even requirements that lie in the past but are still in the current period. For example, if the planning run is carried out in the middle of the month, then those requirements that were planned at the beginning of the month are also included in the calculation of the average daily requirements.
With time-phased materials planning, the system does not calculate average daily requirements using the number of days defined in the profile. It calculates the average daily requirements using the number of days in the interval between the MRP date and the availability date to the next MRP date.
See also:
Range of Coverage for Time-Phased Materials Planning