We have difficulties understanding how to set up and use QSL for our business. Since all QSLs are ranked, and two QSLs cannot have the same ranking, our impression is that they need to be part of the same quality system. Can you explain the purpose of the ranking and an example of how it is used in the real world?
Practical use of Quality System Level
Best answer by Peter Lundgren
QSL defines general requirements on your supplier’s quality system, for instance that they should be ISO 9001 certified. These requirements are user defined, so there are many ways how to define the quality system levels. It could look something like this:

In the Purchase Part page you define the QSL requirements for a purchase part:

And in the Supplier page you qualify a supplier for a specific Quality System Level:

If the supplier for the purchase part have not yet been qualified for the QSL requirements, it will not be possible to release a purchase requisition, purchase order or purchase order change order, unless a manual authorization have been made.
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