Measure with Machine Vision or Micrometer?

depends on the justification. I designed a process that used machine vision to quality test pizza crusts.... With the high volume and the abiliy to test, check, compare, pass or reject on the fly...very efficient and profitable.

Phoenix is right on the money- what are you measuring, what are the tolerances you are looking for, what is the sampling rate, how critical is the measurement to the performance of the product, how skilled is the workforce, or what level of automation are you attempting? If the automated measurement system malfunctions, what is the cost in lost revenues/downtime/rework time? There are many other methods of measuring production, some of which could probably outperform the micrometer or the machine vision system with minimal skill level required and much less investment or potential for failure...