In Reply to Parent Post by jwmanager
My company inspects the incoming parts using CMM and other metrology tools. Our major customer is requiring us to monitor the tolerances of the parts we dimension....So, it is really pretty much an activity to statisfy our customer. I am looking for a very simple software to do this.
You need the only the simplest software, in that what you are doing is taking measurements of randomized lots of product - nowhere near a representation of process control. You have no idea what the original distribution
was, and your vendors apparently do not either. You can not determine a valid Cpk with this data, so I hope your customers are not requiring it. So, invest as little as possible in such nonsense. Run X hi/lo-R charts to visually capture the lot width variation should suffice. I would not bother with X bar-R chart for this type of report card charting.