An anonymous source provided me with the document outlining use of force in the Ann Arbor Police Department. It is a FOIA-able document. I will quote the relevant sections. All bolding, underlining, etc. comes from the original document.
The PPCT/M.C.O.L.E.S. Force Continuum was designed to give officers a model in which to learn the various levels of subject resistance and the appropriate subject control response. This continuum is only a model, and the officer'(s) subject control response should be based upon:
For example, an officer may resort to the use of mace before using hard empty hand controls if the officer believes the use of hard empty hand controls would be ineffective.
US city police officer disciplined for drawing gun/Notes