Do your cost workups with this in mind. Things are not always as they seem. Give
yourself a little wiggle room, say 20%, so that when the powers that be hold your
feet to the fire, you have an extinguisher. My workups were always tight so I would
add 25% to each value. One foreman skoffed at a time that was on a certain rework
engineering change of 25 hours. I fixed him, I put 100 hours on the job and the
shop did it in 20. His boss wanted to know why I put so much time on the job. He
never bothered me about times again.
Time workups are unheard of in this shop now. The shop floor (foremen) report on
how long it takes to do a job.