Scope in Segmentation Strategy 
Scope is used to define the mapping rules or segment combinations in segmentation strategy. Scope can either be 1 or 2.
If the scope is 1, then both requirement segment and stock segment are considered during planning run. Mapping of requirement segment and stock segment can be 1:1 or 1:N.
Example
For 1:1 mapping, assume the requirement is for 100 pieces of segment X. As per this mapping, available stock of 30 pieces of segment X is consumed. As the requirement is not fulfilled, the system proposes to procure 70 pieces of segment X.
For 1:N mapping, assume the requirement is for 100 pieces of segment Z. As per this mapping, all available stock of 100 pieces in all three segments X, Y, and Z are procured.
If the scope is 2, then only requirement segment is considered during planning run. Stock segment is not considered. Customer requirements with specific requirement segments are covered by the common pool of stock available.