Problems with time management is one element of executive function, other elements include predicting, organizing, and planning. We all occasionally lose our keys. I know I do, but I once had a client that was constantly late to every appointment because they could not find their keys or pocketbook.
For most of us a few of those frustrating events and we began to think of ways to deal with our problem. do you put your keys in the same place when you get home? Do you have a specific place you keep your pocketbook or wallet? all are effective strategies to deal with this problem. Because of prior experience we predict that we may lose our keys again, think of a plan to avoid that scenario from being a regular occurrence, and then organize our home in order to not have that happen again. For people with difficulty with executive functioning the process of predicting, planning and organizing may never happen.