Buying Patterns in Volumes/Trade Spends Planning 
You can use volumes/trade spends planning to include an account's buying pattern. A buying pattern describes how much an account typically buys over a particular period of time (see Account Defaults for Trade Promotions).
Note
If you do not make any settings for account defaults, the buying pattern is distributed equally.
Prerequisites
You have entered a period type and set the buying pattern indicator
in Customizing for Customer Relationship Management under 
Marketing 
Marketing Planning
and Campaign Management Basic Data
Define Additional Date Ranges 
.
The additional dates that you define are then included in the buying pattern
and transferred to Business Planning and Simulation (BPS) together with the
plan dates.
Example
By default, a buying pattern starts on a Monday. In the following example, however, the buying pattern starts on a Wednesday. The table below shows how this affects planning.
The example is based on a working week of seven days and a buying pattern of two weeks. In the first week, the customer wants to buy 40%, in the second week 60%, the total number of items being 100. If the buying pattern started on a Monday, this will be 40 items in the first week and 60 in the second.
If the buying pattern starts on a Wednesday, the planning is as follows for the same amounts:
Calendar Week |
Formula for Calculating Buying Pattern |
Comments |
|---|---|---|
CW1 |
4/7 x 40% x 100 |
As the buying pattern starts on a Wednesday, this is not a full week, and the system only calculates 4/7 of the total. |
CW2 |
3/7 x 40% x 100 4/7 x 60% x 100 |
The system takes the remainder of the calendar week that already started followed by the first part of the following calendar week. |
CW3 |
3/7 x 60% x 100 |
The system calculates the remainder. |