Even though I've been using DP for sometime now, I really don't know that much about it. Our QE has asked a question of why a particular TP of a circle CPK is so high ( this is while printing out in the Statistics Report )? I'll leave the one problems below.
you shouldn't do SPC on position of holes. You will NEVER get a good result, even if it shows great.
Correct. And one cannot measure capability of the axis' because there is no tolerance.
All one is showing with Ppk/Cpk is that your process can or cannot make it within the zone. It doesn't specify that it can actually make the part consistently in the same spot.
you shouldn't do SPC on position of holes. You will NEVER get a good result, even if it shows great.
Correct. And one cannot measure capability of the axis' because there is no tolerance.
All one is showing with Ppk/Cpk is that your process can or cannot make it within the zone. It doesn't specify that it can actually make the part consistently in the same spot.
