Yep, or if you are working on a project to build a control system for a new factory which is going live in 18 months, it's pretty reasonable for your management

Yep, or if you are working on a project to build a control system for a new factory which is going live in 18 months, it's pretty reasonable for your management team to want to know that you have confidence you can build the control system within a year. If not, they will probably want to cut the scope or put other risk mitigation in place.