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Former Member
Feb 23, 2009 at 09:23 AM

Problem in calculating the Average Daily Requirement

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Hello all,

I didn't understand how the system calculates the average daily requirement in Dynamic Safety Stock process. The following process flow in given in SAP notes to find how the system calculates the average daily requirement:

1. The system uses the defined parameters to determine the number of days used for calculating the average daily requirements. If the period is defined as a week, the period length as standard days (5 days) and the number of periods as 2, the system divides the total of the requirements by 10 days.

2. The system then calculates the total of the requirements for this period.

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.

3. The average daily requirement is calculated using the formula:

Requirements in the specified number of periods / Number of days within the total period length

I have run MRP on 02/23/2009 and the following results are generated in stock requirement list of the component part:

Date Dependent Requirement MMSA Schedule Lines Quantity

3/3/2009 10 31

3/11/2009 20 20

3/31/2009 30 30

4/14/2009 40 49

4/22/2009 50 50

4/29/2009 60 60

5/11/2009 70 55

5/21/2009 80 80