What SPC (Statistical Process Control) software is your company using?

J

jager

#1
Our metal stamping company would like to invest in new SPC software for use in the manufacturing areas. We have about 50 machines running at a time and most jobs require X bar and R charts. We have used the same software for around 12 years. It's not bad, but has some drawbacks. What are you using? We need to print histograms with Cpk, Cp and Ppk, and also the charts and data. I'm doing some checking around for management. Thanks!
 
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A

arios

#3
Re: What SPC software is your company using?

On a former job Minitab was common, and on older times used to use StatGraphics, but that was a while ago.
 

bobdoering

Stop X-bar/R Madness!!
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#4
Re: What SPC software is your company using?

We use InfinityQS on the shop floor in an primarily assembly application. But, I am not sure if X-bar-R or Cpk calculations are really applicable to stamping, especially if your variation is only affected by tool wear and material variation. It would be applicable for very low precision stamping and equipment with low maintenance requirements. Many software packages can do X-bar/R but few can do the correct charting methodology. I would hate to see you make an investment that would not meet your real needs.
 
Last edited:
S

sixsigmais

#5
Re: What SPC software is your company using?

Minitab is good enough, it is much better than my company, we are using the manual SPC software made by our own
 
J

jager

#6
Re: What SPC software is your company using?

We do chart a lot of variable dimensions such as say...leg height at +/- .005", every 15 or 30 minutes and at the end of the run, approx. 15 subgroups, we print the chart to send to the customer as requested. It has Cp, Cpk, PPM or other info.
Isn't Minitab tough to use on the shop floor where an operator needs to see his on-going average and range, Cpk or Ppk and make machine adjustments accordingly? I have Minitab at my QA Lab desk for a few customers' PPAP submissions, but we use Datalizer 9000 on the floor now. It is ok, but is a dos program. You can't copy and paste, or email charts or any of that handy stuff!
 

bobdoering

Stop X-bar/R Madness!!
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#7
Re: What SPC software is your company using?

.... use on the shop floor where an operator needs to see his on-going average and range, Cpk or Ppk and make machine adjustments accordingly?
What kind of adjustments are the operators doing on the shop floor with this data? It still sounds suspicious that it may be the incorrect methodology for your process.
 
S

Statisticale

#8
JMP - best for you to download the free trial & see if it meets your requirements. Cheers.
 
J

jager

#10
Bob, our customers require SPC with shipments of parts. If the operator is running a machine and measuring a feature 3pcs every 15 minutes and typing caliper or micrometer readings into their computer SPC software, the x-bar and r chart shows if the dimensions they typed in are, for instance, getting close to the upper or lower spec, or control limits, and he will stop the machine, make an adjustment and remeasure. It is simple to do and they can see that their subgroup averages are staying the about same or varying all over.
That's why we use the charts...customers just have us send them.
 
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