![]() ![]() The problem was the machine technician was tasked with manually adjusting, taking samples, measuring them in an optical system and then once he was confident the part was fine he provided the finished process samples to quality who measured and then told the technician he was still off. ![]() I bet you can imagine the frustration the technician felt every time he ran that machine. ![]() As a Quality Engineer I was tasked with "fixing" this. There is a handy equation my mentor Javier once showed me which I will now share with you: In my mind the answer was simple, we had to take the operators out of the measurement equation. VE Equipment Variation is eliminated by making sure our equipment is calibrated.You can read it as: A Process Total Variation is simply the sum of the real Machine Variation + the Measurement Equipment Uncertainty variation + the Operator Variation. This means that our results are real and accurate. VO Operator Variation is eliminated with training, assuring everyone measures the same and when possible and ideally by using automatic systems which are independent from who measures. So if we can eliminate the VO variation by having everyone use the same method and if we eliminate the Equipment Variation by calibrating our equipment then the only variation that remains is the Real process variation.
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