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Business rules
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This table allows to declare business rules. 

A business rule define an inventory policy for all item-locations belonging to a segment. 
In this way the maintenance of inventory policies can be done at a high level and in 
user-friendly way. The inventory policies can still be overridden for individual 
item-locations if required.

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Field            Type              Description
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segment          non-empty string  The segment on which the business rule should apply.
business rule    non-empty string  The business rule type.
value            non-empty string  The value associated to the business rule.                                   
description      string            A free text description for the business rule.
priority         integer           | Controls the sequence in which business rules are applied.
                                   | When multiple rules are all updating the same inventory planning 
                                     parameter of a certain item-location, the line with lowest priority
                                     value will be used.
                                   | The default value is 0.
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