Archery is a game of skill and strength. Just looking at the size of those bow strings and the length they must shoot makes the equipment required, rather than optional, including a bracer and finger tab. Every archer wants to hit the center of the target every time. That target, however, is larger than the device that will pierce it. There’s a little give there. In this series, we've been talking about the Power of One, and today, we're looking at the reverse; there's not just one way to look at your issues and determine what's wrong.
Even if you are in the highest strata of regulated manufacturing, where zero tolerance is a must, you still have a little wiggle room. Without a completely automated plant and process, using only the most calibrated robots and regular reviews of their work, your team will always be off by just a little. Measuring something may allow for a thousandth or a tenth of a millimeter variance. (Note: I did choose that one randomly. The human eye can see a 1/10th of a millimeter line, crazy as that seems.)