There is a really good podcast on why large projects fail.... https://omegataupodcast.net/181-why-megaprojects-fail-and-what-to-do-about-it/ https://omegataupo

There is a really good podcast on why large projects fail.... https://omegataupodcast.net/181-why-megaprojects-fail-and-what-to-do-about-it/ https://omegataupodcast.net/181-why-megaprojects-fail-and-wh... It talks about sources of bias in estimates, and why that bias is so prevelant.