How commitment allocation with allocation type as weight works?

Summary:

I am looking for use cases for commitment allocation configuration with allocation type as weight. This configuration cannot be used as part of planning, but I am interested in understanding how it can be used in other ways.

Content (required):

We have a commitment allocation requirement based on weight. For example, we need to be able to distribute an order of 10 tons between Servprov1 and Servprov2 in a 60:40 ratio.

I am exploring commitment allocation configuration with allocation type as weight as a way to meet this requirement. However, I understand that this configuration cannot be used as part of planning.