Patrick MacLeamy, the former CEO of HOK, a global architecture, engineering, and planning, worked for the company for 50 years.

He is also the creator of the MacLeamy curve, which explains that changes in architecture and construction projects become more expensive further the project has developed.

https://www.danieldavis.com/macleamy/,

This is also one of the core reasons, why so many construction projects go over the budget and miss their timelines.