In the last clips, we showed how to find economic optimum settings, such as tension. Unfortunately and inevitably, you will run into a case where you do all the right things, including optimization, but not solve the problem to everyone’s satisfaction.
The most common reason is that the "knobs" you are allowed to adjust simply do not have the authority, singly or in combination, to fix the problem. Let me illustrate with but one example of uncountable ways this might happen. What happens is if your problem is caused mostly by your customer’s machine or process? That situation is overconstrained.
Now what? You need to find another knob with sufficient authority else you should move on to a different project. See how and why in the link below.
Web201.56eYouTube clip link: