<0 The Redundant zone
- Skill ups can be harder to attain
- The recipe is too easy to improve your skill
- Just too many factors helping you succeed, so no chance to learn

0-2 The Success zone
- Very good rate of success
- Skill ups will happen, but some will be lost due to the recipe being easy to your current skills.
- Best used when the recipe is break even or profit, and/or when the ingredients are expensive.

2-4 The Prime Skill up zone (Aim for this)
- Very good rate for skill ups
- Failures will happen, but at a fair trade off for skill ups (in most cases)
- For anywhere from 7/8-1 levels from cap, it is fairly easy to get the "X" to be in this range

4-6 Skill from fails zone
- OK rate for skill ups
- Best to be within 5 levels of cap so that skill ups can still be gotten from failures. 5 is not the "X" value, but just the rigid calculation of cap - skill.
- Supplies better be cheap, or you will be digging yourself into a hole

>6 High risk, low reward zone
- No good reason to be in this zone
- Only for the pure power leveler, who could care less about expenses
- Please move onto another craft/recipe before wasting your gil here.