We had a situation where Marketing wanted an incredibly aggressive MTX deliverable schedule and Costumes (a great seller) was big on that list. But the schedule was way out of scope of our current resources and output ability. But you can't just "say", that doesn't work for me and expect that'll work. (So after I freaked out internally, went home, and hugged my cat for a while, I went to the data.) You can't argue data.
I grabbed all the historical data we had on how long costume sets typically took, and plotted out a "real" timeline that revealed expectation vs. reality. The expectation vs. reality was weeks off. I presented the schedule to leadership, argued my point, made some recommendations for alternate options, and - because I worked with smart and reasonable men - my concerns were validated, we updated the schedule to be more realistic, and I was very happy. (And relieved.)
