Role definition - foreman - service manager

I work in/on a shop (20 floor workers) that has had these 2 roles combined for many years.
We are now looking to separate my role as both to dedicated service manager and a separate foreman.
The reasoning is one person can do both roles poorly, but as separate roles the company will have the capacity to grow through working on the buissness not in the buissness.

I am writing up the role definitions and duties shortly.

Always drawing interesting perspectives and advice from this forum, I thought I would ask you:
What do you expect of your service manager or foremen? Their duties and roll in the buissness

As a note. We are a electric motor and generator repair facility in an ever busier market. Multi trade workforce. Shop and service call.
1hp to 7000hp projects.

Thank you all for
Your time and consideration

One role is managing people and the other is managing the work flow.

The service manager manages how the service work is received and work flow in and out of the shop.

Shop foreman leads the crew in the shop to insure all are on task and work flow.

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