best practices - Handling Global Suppliers

Summary:

We have global suppliers who operate in different countries with different legal name and tax identifiers. Example 3M, Thermo fisher, Agilent etc.

At a country level these are different suppliers with different Supplier sites. However what is the best practice for setting them at a global level ? How to provide a consolidated view of much business was done with the Thermo Fisher group so that volumes can be leveraged for better negotiation?

Thanks in advance for your advice.

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