Modern Machine Shop
Charting the Course Through Schedule Drift
Evan Doran · September 8, 2026
“Plans never survive contact with reality.”
MMS visited Three Sigma Manufacturing in Kent, WA and Yeager Manufacturing Technologies in Winter Park, FL to look at how both shops handle schedule drift — the gap that opens between the morning plan and the actual floor. Neither shop was short on data; both could see what was late. What changed was seeing it early enough to move something.