T
tweers
We are working on implementing SPC at our facility for the first time, and I was hoping someone was able to offer some guidence.
Our inspection process currently works by measuring 1 part per shift, 3 shifts, so 3 parts per day. A part may only run for a couple days, or may run for months.
My current understanding leads me to think I am looking at a Control Chart for Individual Measurements using x-bar and MR-bar. Because my subgroup size is really only ever going to be 1, is this the best chart I should use? I'm a little concerned this could lead to type-II errors.
Do the short runs steer me away from measuring part specific dimensions, or should I just look at process variance?
I appreciate anyone's assitance, and I doubt these will be my only questions with a project of this magnitude. I just want to make sure things are done right the first time.
Thanks again.
Our inspection process currently works by measuring 1 part per shift, 3 shifts, so 3 parts per day. A part may only run for a couple days, or may run for months.
My current understanding leads me to think I am looking at a Control Chart for Individual Measurements using x-bar and MR-bar. Because my subgroup size is really only ever going to be 1, is this the best chart I should use? I'm a little concerned this could lead to type-II errors.
Do the short runs steer me away from measuring part specific dimensions, or should I just look at process variance?
I appreciate anyone's assitance, and I doubt these will be my only questions with a project of this magnitude. I just want to make sure things are done right the first time.
Thanks again.