Then you must leave a path of annoyance and destruction.

as most tasks depends on many factors and if you estimated the correct prep time.

If it’s a 4 minute job on a computer and you hit a network lag, then you failed at determining factor calculation.

If you hang a shelf and estimate 10 minutes but didn’t do the prep of finding the stud then parts of the wall falls down, you failed at determining factor calculation for the task as you didn’t account prep time.

If you think you could clean a table in 2 minutes but then you realize the dishwasher wasn’t emptied, so you just left dishes on the counter for someone else to do the labour instead of accounting extra time then you failed at factor calculations.

If you determine 3 minutes to throw your laundry in the machine but didn’t factor the machine needed emptying first then you failed at factors.

Now if things are going on without a hitch, you can use time to your advantage for better preparation. If I give 10 minutes for a 7 minute task I’m gonna take that extra 3 minutes to grab a glass of water.

If however someone needs to know I will take exactly 7 minutes to hang a shit they need therapy and that stops being my problem to ‘time’ manage for them.