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Product Determination 
You can enter as many product descriptions as you require, for example product descriptions typical for a specific industry (alternative IDs) within order entry. This makes it faster and more efficient to enter products.
Product determination is available to you in CRM Enterprise, Mobile Sales, the Interaction Center WinClient, Internet Sales, and Channel Management.
● You have defined a profile for alternative product IDs and the related sequence of ID categories in Customizing. To do so, in Customizing of SAP CRM, choose Customer Relationship Management ® CRM Cross-Application Components ® SAP Product ® Alternative Product IDs ® Define Profiles.
● You have assigned the profile to the required transaction type in Customizing.

Entering a profile for alternative product IDs overrides entries in Customizing fields for product determination valid up until CRM 3.1.
● Enter GTIN
● Enter partner product
● Enter product order number
● Always check product ID
● If you wish to enter partner products, you have maintained a partner product in the product master.
●
If you wish to
enter Global
Trade Item Numbers (GTINs), you have maintained these in the product
master. See
Set Types in Product
Maintenance.
You can enter different product IDs when creating a business transaction, for example:
● Product ID
● Product order number (PON)
● Partner product
● Global Trade Item Number (GTIN)
The system automatically finds the product ID used in SAP Customer Relationship Management (SAP CRM).
If the system cannot find a unique product, you can use detailed information to choose from the possible products.
In Mobile Sales, you can search for and enter products using the alternative ID, GTIN, and customer material number. The settings required for this are loaded from Customizing to the Mobile Client.
Unlike in CRM Enterprise, there are two input fields for entering products on the user interface for Mobile Sales; the normal field for the product ID and another field for entering an alternative ID. However, you can only use one alternative ID, as it is only possible to enter one alternative ID in this additional field. Therefore, you have to decide on one of the alternative IDs. From the two alternative IDs, the system chooses the one that is found fist in the sequence for ID categories.
You can only use product determination in the CRM Internet Sales business-to-business scenario.