But you don't work for a large corporation (or government).
A person signs off on the job, and that person has no clue if it's done, or done right.
So, since the job is signed off, the contractor gets paid.
We hired Westinghouse, a pretty big, supposedly reputable company to revamp the instrumentation on an entire "Coke Oven Battery".
Job get's signed off, Westinghouse goes away.
They were hired, cause some loon determined it would be "cheaper" than doing it "in-house".
So, after Westinghouse rode off into the sunset, my group get's a call. Then another. Then another. And it keeps going.
Multiple problems. Hardwired, designed problems.
Conduit run too close to heat sources. Melting cables.
Certain valves fail open or shut, depending on what you buy. And you install them with a certain reasoning.
You usually want natural gas valves to fail shut.
You usually want cooling water valves to fail open.
etc.
The installed valves were all of one type. They were wired to "appear" to fail in the correct position. But they didn't.
Use of brass parts/valves in an atmosphere that rots brass in months. Because it was cheaper than stainless steel.
Instrumentation that was designed by a drunk.
We get a call, because Production is tired of trying to read a meter. The problem. To read the meter, you had to take the display, divide by 3, and subtract 60. Who the heck does that? You want a meter to read 10 mm H20 Pressure, you make it read 10. No calculation.
And the list goes on.
So, we were able to keep the conduit they ran, just having to move some.
We ripped out the wiring to wire it right.
We replaced/switched/rebuilt valves as necessary. (large control valves worth 10s of thousands apiece).
We reprogrammed instrumentation and displays.
So, my company paid a contractor to do the job.
Then they paid us to undo the job.
then they paid us to do the job.
then they had to buy new equipment because the installed equipment was designed for someplace like a chocolate factory. Not resistant to weather or corrosion.
And yet they crowed about how cheap Westinghouse did it, and how much money they saved.
I have hundreds of stories similar.
Most recent involves a camera job that cost more than when we wired the entire building.
's would stop driving through the wet cement that would help the progress of 9 mile.
