Calculation of Quantity Factors for Product Substitutions 

Use

This function calculates quantity factors for all substitute products of an input product based on the following information:

●     Factor for predecessor quantity

Quantity of the predecessor product that you have defined in the product and location product master data (interchangeability master data)

●     Factor for successor quantity

Quantity of the successor product that you have defined in the interchangeability master data

●     Access Strategy

Access strategy that you have defined in the rule control

●     Position of the input product in the supersession chain

The system uses the calculated quantity factors from the interchangeability master data to generate a list with substitute products. Information about quantity factors for a predecessor product and a successor product is defined in the interchangeability master data. The rules-based ATP check, on the other hand, requires information about the quantity of one substitute product.

Example

Settings in the Interchangeability Master Data

The following settings are defined in the master data for interchangeability:

Predecessor Product	Successor Product	Factor for Predecessor Quantity	Factor for Successor Quantity	Direction of Interchangeability
P1	P2	1	5	Full
P2	P3	1	3	Full

One piece of product P1 is substituted by five pieces of product P2. One piece of product P2 is substituted by three pieces of product P3.

Calculation of Factor Quantity Depending on the Position of the Input Product and the Access Strategy

Input product P1 and access strategy Work forward from input

If the input product is P1 and the access strategy is Work forward from input, the system calculates the following quantity factors:

Product	Factor for Predecessor Quantity	Factor for Successor Quantity
P1	1	1
P2	1	5
P3	1	15

One piece of input product P1 is substituted by five pieces of P2 or by 15 pieces of P3.

Input product P2 and access strategy Work forward from input, then cyclic

If the input product is P2 and the access strategy is Work forward from input, then cyclic, the system calculates the following quantity factors:

Product	Factor for Predecessor Quantity	Factor for Successor Quantity
P2	1	1
P3	1	3
P1	5	1

One piece of input product P2 is substituted by three pieces of P3 or by 1/5 pieces of P1.

Input product P2 and access strategy Start from bottom of list

If the input product is P2 and the access strategy is Start from bottom of list, the system calculates the following quantity factors:

Product	Factor for Predecessor Quantity	Factor for Successor Quantity
P3	1	3
P2	1	1
P1	5	1

One piece of input product P2 is substituted by three pieces of P3 or by 1/5 pieces of P1.

Input product P3 and access strategy Start from bottom of list

If the input product is P3 and the access strategy is Start from bottom of list, the system calculates the following quantity factors:

Product	Factor for Predecessor Quantity	Factor for Successor Quantity
P3	1	1
P2	3	1
P1	15	1

One piece of input product P3 is substituted by 1/3 pieces of P2 or by 1/15 pieces of P1.