I created a script that adds a calculator to the factory supply page that you can use to estimate the quality of products you can produce using different quality inputs or technology level. The script gets the current quality of inputs from your factory. All you have to do is enter a technology level, quality modifier, adjust any inputs you desire, and click the Calc button to get an estimate of what quality products you can expect to produce.
For quality modifier, omit the percentage (%) symbol. In the example below, I had +12% for specialization which I entered as 12. If you have more than one bonus, make sure to multiply them. For example +12% specialization and +10% innovation bonus results in a 23.2% bonus (1.12 * 1.10 = 1.232) and can be entered as 23.2
I updated the script to work with the new site design. I don't have time to update it to work with the new interface so it still works best using the old interface.