The Elsmar Cove Business Standards Discussion Forums More Free Files Forum Discussion Thread Post Attachments Listing Elsmar Cove Discussion Forums Main Page
Welcome to what was The Original Cayman Cove Forums!
This thread is carried over and continued in the Current Elsmar Cove Forums

Search the Elsmar Cove!

Wooden Line
This is a "Frozen" Legacy Forum.
Most links on this page do NOT work.
Discussions since 2001 are HERE

Owl Line
The New Elsmar Cove Forums   The New Elsmar Cove Forums
  FMEA and Control Plans
  Multiple controls for single failure mode

Post New Topic  Post A Reply
profile | register | preferences | faq | search

UBBFriend: Email This Page to Someone! next newest topic | next oldest topic
Author Topic:   Multiple controls for single failure mode
sulkinsf
Lurker (<10 Posts)

Posts: 7
From:Columbus, Ohio
Registered: Jul 2000

posted 25 September 2000 11:25 AM     Click Here to See the Profile for sulkinsf   Click Here to Email sulkinsf     Edit/Delete Message   Reply w/Quote
Cross functional review is a design control for all design failure modes. Since it is also a weak control are we required to provide an action even if stronger controls are in place?

For example,

Potential failure mode is poor callout on weld. This is controlled by cross-functional review (weak control), and design rules (strong control).

I am wondering how you guys handle this. I was thinking about consolidating the controls and ranking according to the strongest control.

-Steve.

IP: Logged

Marc Smith
Cheech Wizard

Posts: 4119
From:West Chester, OH, USA
Registered:

posted 25 September 2000 11:35 AM     Click Here to See the Profile for Marc Smith   Click Here to Email Marc Smith     Edit/Delete Message   Reply w/Quote
I often see multiple controls for a single failure mode but have never thought about combining them.

IP: Logged

sulkinsf
Lurker (<10 Posts)

Posts: 7
From:Columbus, Ohio
Registered: Jul 2000

posted 27 September 2000 08:15 AM     Click Here to See the Profile for sulkinsf   Click Here to Email sulkinsf     Edit/Delete Message   Reply w/Quote
How do you handle the resulting RPN values? Do you assign tasks to the higher RPN knowing that the failure mode is detectable by the other control?

IP: Logged

e.s.deo
Forum Contributor

Posts: 13
From:India
Registered: Aug 2000

posted 26 October 2000 01:44 AM     Click Here to See the Profile for e.s.deo   Click Here to Email e.s.deo     Edit/Delete Message   Reply w/Quote
It can be handled in the following manner:
LIst the various controls you have ''
List the ratings for their detection individually say 2,4,7
Take the best i.e 2 in this case (although it will be even better by a combination of all of them together ..I dont want to complicate the issue by combining their probabilities..)

Use the best for prioritising..

HOWEVER, IN THE CASE MENTIONED BY YOU..
"Potential failure mode is poor callout on weld. This is controlled by cross-functional review (weak control), and design rules (strong control). "

I WOULD CONSIDER DESIGN GUIDELINES AS A METHOD WHICH WILL HAVE AN EFFECT ON THE OCCURENCE RATING AND NOT DETECTION RATING.

Thanks

e.s.deo

IP: Logged

All times are Eastern Standard Time (USA)

next newest topic | next oldest topic

Administrative Options: Close Topic | Archive/Move | Delete Topic
Post New Topic  Post A Reply Hop to:

Contact Us | The Elsmar Cove Home Page

Your Input Into These Forums Is Appreciated! Thanks!


Main Site Search
Y'All Come Back Now, Ya Hear?
Powered by FreeBSD!Made With A Mac!Powered by Apache!