Tracey, are you working with the broker (doing "brokerish" things) or are you working with his agents?
My immediate thought is: I don't do production sheets. I'm not his employee. He can't make me

But, I've been pushed around by clients too many times, and I'm a bit cynical and very picky.
My second thought is: I don't do production sheets, but they might make my job a bit easier since it's a system that's already in place. I'll see what it is and make an informed decision, after all, I am a business owner, not an employee.
To my knowledge, a production sheet is what is used when an actual good (not a service) is being produced. I've yet to see it used by any of my client, or in either of my dh's offices (both mortgage and RE).
Good luck, and congrats on the client!