Send Email when New Revision with Method has been Checked In

We are trying to figure out how to have an email sent to our IT
department after Engineering has Checked In a New Revision that now has
a MOM. We are rooting around in BPM but are a little lost when trying
to analyze our trace, where to insert the BPM, what conditions need to
be used, etc. We do understand the email part, but unfortunately we
don't know where to trigger it from (our emails are being sent but for
all the wrong reasons).....Any assistance would be appreciated.

Thanks :-)

Jennifer Pavey