Subject: | |
From: | |
Reply To: | |
Date: | Fri, 28 May 1999 14:55:18 -0400 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
I HAVE USED (AND QUITE SUCCESSFULLY) ANOVA MAINLY FOR EITHER R&D
(DETERMINATION OF OPTIMAL CONDITIONS) OR TROUBLE SHOOTING PROCESSES
(ESPECIALLY WHEN THERE IS MORE THAN 1 PROCESS SUSPECT OF CAUSING A
PROBLEM).
HOWEVER I HAVE NEVER TRIED TO USE IT AS A SOLE MEANS TO DETERMINE PROCESS
CAPABILITY AND REPEATABILITY.
I HAVE FOUND X BAR AND R CHARTS THE BEST TO DO THIS FUNCTION. THEY GIVE YOU
THE BEST "PICTURE" OF WHAT IS REALLY GOING ON IN YOUR PROCESS, AND IF ANY
CHANGES MADE HAVE MADE - WHETHER THERE IS AN IMPROVEMENT OR VISE VERSA.
I DO THINK THAT ANOVA CAN BE USED AS A SUPPLEMENTARY TOOL TO X BAR AND R
CHARTS. PERFORMING DESIGN OF EXPERIMENTS (DOE) AND ENTERING THE DATA INTO A
DOE SOFTWARE CAN SHOW YOU OPTIMAL CONDITIONS; THOSE PROCESSES OR ITEMS
THAT MOST AFFECT AN OUTCOME YOU ARE EXPERIMENTING FOR; AND THE EFFECT OF
INTERACTION BETWEEN ITEMS.
THIS DATA CAN BE USED TO MAKE POSSIBLE IMPROVEMENTS, AND THE X BAR AND R
CHARTS YOUR MEASUREMENT OF THOSE IMPROVEMENTS.
IF YOU NEED FURTHER HELP PLEASE FEEL FREE TO EMAIL ME OFFLINE.
TED
----------
> From: Dean Jones <[log in to unmask]>
> To: [log in to unmask]
> Subject: [TN] Why ANOVA
> Date: Friday, May 28, 1999 10:11 AM
>
> Dear Technetts,
> One of our manufacturing plants is planning to use the ANOVA (analysis of
> variation) approach to calculate process capability and repeatability.
> I am not really familiar with this method of process monitoring. I've
read
> on the Internet, that ANOVA allows you to determine significant
differences
> between two or more means. But, I am not sure how it could be used for
high
> volume production process monitoring. Is this approach better than X bar
> and R charts and process capability histograms?
> Does somebody use ANOVA for this purpose? Please, share your experience
> with me.
> Sincerely,
> Stella Neyman
> Eaton Incorporation
>
> ################################################################
> TechNet E-Mail Forum provided as a free service by IPC using LISTSERV
1.8c
> ################################################################
> To subscribe/unsubscribe, send a message to [log in to unmask] with
following text in the body:
> To subscribe: SUBSCRIBE TechNet <your full name>
> To unsubscribe: SIGNOFF TechNet
> ################################################################
> Please visit IPC's web site (http://www.ipc.org) "On-Line Services"
section for additional information.
> For technical support contact Hugo Scaramuzza at [log in to unmask] or
847-509-9700 ext.312
> ################################################################
################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe: SUBSCRIBE TechNet <your full name>
To unsubscribe: SIGNOFF TechNet
################################################################
Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################
################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe: SUBSCRIBE TechNet <your full name>
To unsubscribe: SIGNOFF TechNet
################################################################
Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################
|
|
|