I like the “most expensive number” hook, and enjoyed the read. However, I’d hazard the most unnecessarily costly variable in engineering (over time, in aggrega

I like the “most expensive number” hook, and enjoyed the read. However, I’d hazard the most unnecessarily costly variable in engineering (over time, in aggregate; as well as on most any given substantial project) is the number of days later a project starts than it could have if it had just gone ahead and started.