GM's (my) attribute ratings

Okay, how do the GM's (my) attribute ratings come into play? What I mean is are my attribute ratings combined with all the coaches' ratings to give the final ratings? So if all my ratings are 1 and all the coaches' ratings are 100, is the average for each rating 1 (for me) + (100 x 4 [for the coaches]) = 401 / 5 (5 is the number of entities, the GM [me] and the coaches [4 of them]) = an average of 80? Or, for each rating, are the GM's and the coaches' ratings added then compared to some number (401 against 1000, for example)?
Is there a time when the GM's ratings are used and not the coaches? Or is there a time where the GM's ratings aren't used? I think you get the idea.
Thanks.
Is there a time when the GM's ratings are used and not the coaches? Or is there a time where the GM's ratings aren't used? I think you get the idea.
Thanks.