Customer :Can you build a system that rates our product by XYZ standard?
Us: Sure!

*time passes*

Us: Ta-da!
Customer: Okay, here are some good and some bad products!

*products get rated shit to supershit*

Customer: No, that's wrong. Some of these are as good as we can, they should be rated best!
Us: okay, we offset the results.

*products get rated good to barely okay*

Customer: Great! Can you sign that the system rates by XYZ Standard?
Us: No.
Customer : But we paid you to rate by XYZ standard!
Us: By XYZ standard your products are bad, you can either have your products rated by standard or pass the test.
Customer: Unacceptable!
Us: Improve production?
Customer : Not possible, the job is done when you rate the products good by XYZ standard.