Same goes for IT projects, junior developers usually have a significant confidence when facing new problem (task estimation). Their confidence sometimes comes f

Same goes for IT projects, junior developers usually have a significant confidence when facing new problem (task estimation). Their confidence sometimes comes from limited ability to see all the path that may go wrong, on the other hand senior developers although have considerable experience, sometime overthink solution because of the past experiences, and often they leave extra space for so called "known unknowns" and "unknown unknowns".