SPC (Statistical Process Control) Overview

C

chvrajus

Hi All -

First of all, thanks for the information about SPC.

I am new to this forum and this is my first post and I am not sure if I am posting under right thread.

I am working for a manufacturing company and my manager told me to study about SPC. Especially for low volume SPC

Can any one have idea about low volume SPC.

  • What kind of charts will be used for SPC (Histogram, Bell curve chart, etc……)
  • How to calculate the limits
  • I want to monitor the live data and offline data. What tool or SW is available in the market for SPC charts and reports
  • Any examples?

Thanks in Advance
Ven
 

Steve Prevette

Deming Disciple
Leader
Super Moderator
Take a look at http :// www .hanford.gov/rl/?page=1144&parent=169 - OBSOLETE BROKEN 404 LINK(s) UNLINKED - PLEASE HELP - REPORT POSTS WITH BROKEN LINKS

If you are in the USA, you should have no problem accessing. I have heard reports of folks in some foreign countries not being able to access it.

It does provide a way to do SPC and several examples.
 
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bobdoering

Stop X-bar/R Madness!!
Trusted Information Resource
I am working for a manufacturing company and my manager told me to study about SPC. Especially for low volume SPC

What kind of processes and characteristics are you trying to control? That is important to know to aim you in the right direction.
 
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M

mjfqd

Where can I find a comparison of SPC programs? We machine parts for aerospace.
 
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A

artichoke

Can any one have idea about low volume SPC.
Ven,
I strongly recommend buying Don Wheeler's SPC "bible" - "Advanced Topics in SPC" and perhaps some of his other books.
page 267, Ch 11.9 "Control Charts for Rare Events" may answer your question.
 

Stijloor

Leader
Super Moderator
Where can I find a comparison of SPC software programs?

There's a ton of stuff out there. I've seen buyers guides, but these are all very biased, actually more advertisements. I suggest that you make a listing of your actual SPC software needs/applications; that will help you to narrow the search. Then start contacting possible suppliers, you may even get their stuff on a trial basis. You can always ask for comments/feedback here at The Cove Forums.

I hope other (SPC Expert) Covers will chime in.

Stijloor.
 
M

mjfqd

Hi All -

First of all, thanks for the information about SPC.

I am new to this forum and this is my first post and I am not sure if I am posting under right thread.

I am working for a manufacturing company and my manager told me to study about SPC. Especially for low volume SPC

Can any one have idea about low volume SPC.

  • What kind of charts will be used for SPC (Histogram, Bell curve chart, etc……)
  • How to calculate the limits
  • I want to monitor the live data and offline data. What tool or SW is available in the market for SPC charts and reports
  • Any examples?

Thanks in Advance
Ven

IX/MR charts (individual X/Moving Range) charts use the results from each part to establish control limits. However, you still need about 100 measurements to get meaningful results.

Target charts are another way to go. You combine the charts from similar runs by normalizing the data. For instance, you use the measurements from different parts that have similar features such as drilled holes. By charting the deviation from the mean of the tolerance for the holes, you can watch the overall process. The trick is to limit the variables (machines, operators, material, tools, etc).
 
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Stijloor

Leader
Super Moderator
IX/MR charts (individual X/Moving Range) charts use the results from each part to establish control limits. However, you still need about 100 measurements to get meaningful results.

Target charts are another way to go. You combine the charts from similar runs by normalizing the data. For instance, you use the measurements from different parts that have similar features such as drilled holes. By charting the deviation from the mean of the tolerance for the holes, you can watch the overall process. The trick is to limit the variables (machines, operators, material, tools, etc).

Sorry, I am confused...:confused: What post are you responding to?

Stijloor.
 
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