Hi Melissa, I'd probably lean toward structuring the Management Units by supervisor, or by supervisor groups, mainly to make day-to-day visibility and follow-up easier.
The only thing I'd watch out for is the Management Unit limit within the Business Unit. I've used this approach before, but in a few cases we had to combine smaller teams under the same MU to stay within the limit (10).
I'd avoid grouping strictly by call type if agents are blended across different call types, because it can make ownership and visibility harder. Shift-based MUs could work, but only if the shifts are very stable.
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Att,
Breno Canyggia Ferreira Marreco
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