When we started Eminent Domain on Kickstarter, there was no artwork started, and we scrambled to get together the artists after it funded. Additionally, we learned with our manufacturing partner, Panda Games Manufacturing, how to avoid the problems we have with Eminent Domain last time.
For "Kings of Air and Steam", we have mapped out delivery dates for molded plastic bits specs, wooden bits specs, and final artwork delivery. In addition to this, we have an artwork schedule mapped out with bi-weekly milestones to know that we are on track to deliver in time.
Each of these delivery dates provides a decent amount of cushion for potential delays. If we are falling behind, then we should know about it early and be able to hustle and catch up.