Doing things backwards is a common way to align the variables in a production process—as long as the controls for the end result can remain consistent. In other words, the press needs to be in good shape and hold registration for the whole refinement to take shape. It makes no sense to try to work backwards from test prints done on an uneven press with dull squeegees, warped screens, and bumped platens. Results will vary too much, depending on the uncontrollable surfaces and pressures presented. Only by dialing everything in will it make sense to work through the process backwards and isolate the necessary elements that can provide a new standard for color-blend printing.
 
A quick press check is essential to keep everyone honest. And if asked, the majority of screen printers would shrug if you were to ask them to identify the last time they checked the level and consistency of their presses. Why? For the most part, the machines are pretty consistent, so they tend to stay in spec for long enough that issues can be addressed as they come up. Only when a serious break to a part or a screen printing failure occur are maintenance concerns brought up.