Control Plan Requirements - Should I identify all the individual drawing dimensions?

M

madeyecol

#1
Hi All,

I am fairly new to control plans and would like some thoughts on control plan requirements with regard to product characteristics

I have performed a PFMEA on the manufacture of a fabricated component which undergoes a number of processes i.e. basically the blank is punched out from a sheet, formed, drilled etc, and I am attempting to draft the control plan.
My question is with regard to the product characteristics produced at the punching stage. The component blank is punched from a sheet of titanium by a machine controlled by an NC programme. When identifying the product characteristics for this punching process, should I be identifying all the individual drawing dimensions for which the blank obviously covers. I have not identified all these individual dimensions on the PFMEA.

thanks

Colin
 
Elsmar Forum Sponsor

Manix

Get Involved!!!
Trusted Information Resource
#2
Re: Control plan requirements

Your product characteristics would indeed need to be stated and the dimensions of the blank would be included. As would any visual requirements for the blank. You would probably want to check the the blank is complete and does not have any burred edges and the like, these are all Product Characteristics.

Your PFMEA need not contain individual dimensional requriements. This identifies failures within your process so you may look at failure modes that would lead to incorrect dimensions, I.e. Blanking force too high or too low etc..... This would lead you to control your process sufficiently in the control plan. So other characteristics you could include in your control plan could be the Stamping pressure settings, which would then be followed up with inspection frequencies and control methods in the preceeding columns (assuming you are using the QS / TS style Control Plan form).

Basically your control plan can contain both process and and product characteristics and all need to be inspected and controlled as per your plan.

I hope this helps!
 
M

Michael Walmsley

#3
Re: Control Plan Requirements - Should I identify all the individual drawing dimensio

"Basically your control plan can contain both process and and product characteristics and all need to be inspected and controlled as per your plan."


True,yet
"At a minimum, the info you transfer into your control plan must be those items that have special characteristics in the FMEA."
 

Jim Wynne

Staff member
Admin
#4
Re: Control Plan Requirements - Should I identify all the individual drawing dimensio

The only items you need to cover in the control plan are:
  • Special characteristics, as Michael suggests;
  • Appropriate items from the "Current Process Controls" fields on the PFMEA;
  • Anything you want controlled during the operation, whether it be product or process characteristics.
You do not have to list all drawing characteristics; the PFMEA and control plan are risk management tools. If, during the course of the PFMEA process, you identify product or process characteristics that don't need special controls, they don't need to appear on the control plan. In most cases, however, it should be possible to deduce from the PFMEA why you made the decisions you made.

One more note: for every product characteristic on the control plan, there should be an associated process characteristic. It's a process control plan, not an inspection plan.
 

Manix

Get Involved!!!
Trusted Information Resource
#5
Re: Control Plan Requirements - Should I identify all the individual drawing dimensio

One more note: for every product characteristic on the control plan, there should be an associated process characteristic. It's a process control plan, not an inspection plan.
That's a good point and one that I did not make clear in my initial reply.

Thanks Jim
 

Raffy

Quite Involved in Discussions
#6
Re: Control Plan Requirements - Should I identify all the individual drawing dimensio

The only items you need to cover in the control plan are:
  • Special characteristics, as Michael suggests;
  • Appropriate items from the "Current Process Controls" fields on the PFMEA;
  • Anything you want controlled during the operation, whether it be product or process characteristics.
You do not have to list all drawing characteristics; the PFMEA and control plan are risk management tools. If, during the course of the PFMEA process, you identify product or process characteristics that don't need special controls, they don't need to appear on the control plan. In most cases, however, it should be possible to deduce from the PFMEA why you made the decisions you made.

One more note: for every product characteristic on the control plan, there should be an associated process characteristic. It's a process control plan, not an inspection plan.
Hi Jim,
What are special characteristics in the Control Plan? What are these? How am I going to apply these special characteristics in a Speaker Assembly Setup? Please advice.
Thanks in advance.
best regards,
Raffy
 

Manix

Get Involved!!!
Trusted Information Resource
#7
Re: Control Plan Requirements - Should I identify all the individual drawing dimensio

Hi Jim,
What are special characteristics in the Control Plan? What are these? How am I going to apply these special characteristics in a Speaker Assembly Setup? Please advice.
Thanks in advance.
best regards,
Raffy
Your special characteristics will normally be defined by your customer, if they are design responsible, or yourself if you are design responsible.

In my experience SC's are usually added to characteristics that effect fitment of the loudspeaker to the application (hole centres etc... but are obviously dependant on the fitment requirements), and will almost certainly be performance characteristics, usually SPL (average over 20Hz - 20Khz). There may also be a requirement to verify Impedance as an SC.

Like I say these are usually defined by the customer and require increased inspection regimes and Initial Capability studies.
 
Thread starter Similar threads Forum Replies Date
V How to Add Annual Revalidation requirements to Control Plan? FMEA and Control Plans 5
M Annual Layout requirements for PPAP/Control Plan FMEA and Control Plans 6
5 ISO9001:2008 Control Plan Requirements ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 9
A Control Plan Content Requirements - GDP (Good Documentation Practices) APQP and PPAP 3
M TS 16949 Production Control Plan Requirements - Format(s) APQP and PPAP 4
B Control Plan Revision Requirements - Notification of and Approval by Customers FMEA and Control Plans 1
D MSA Requirements for Equipment Referenced on Control Plan Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 7
T TS 16949 Clause 7.5.1.1 - Audit Finding - Control Plan Requirements IATF 16949 - Automotive Quality Systems Standard 11
F MSA and Control Plan - Satisfying Visual Inspection Requirements IATF 16949 - Automotive Quality Systems Standard 5
Y Can our prototype control plan meet the requirements? IATF 16949 - Automotive Quality Systems Standard 4
A Define Final Inspection Requirements on the Control Plan? Inspection, Prints (Drawings), Testing, Sampling and Related Topics 1
W Control Plan Content Requirements - Level of Detail FMEA and Control Plans 25
D Three Questions About Control Plan Content and Requirements FMEA and Control Plans 11
A Prototype control plan FMEA and Control Plans 2
S Which department should prepare the control plan? could you show me a standard regarding to this matter. FMEA and Control Plans 17
G Control Plan & PFMEA Review Procedure? FMEA and Control Plans 1
P IATF 16949 requirement - error-proofing in control plan IATF 16949 - Automotive Quality Systems Standard 3
earl62 What is the best way to control special characteristics in Control plan? Is it Mandatory to have SPC for IATF 16949? IATF 16949 - Automotive Quality Systems Standard 12
I Control Plan (Product/Process specification/ Tolerance) acceptance FMEA and Control Plans 27
J Control Plan use on the manufacturing floor FMEA and Control Plans 4
E Change in control plan - Do I have to do sampling? IATF 16949 - Automotive Quality Systems Standard 1
D All Dimensions listed on control plan FMEA and Control Plans 10
DuncanGibbons Manufacturing Plan vs Material Specification vs Control Plan Manufacturing and Related Processes 5
S Should safety checks be included in the Control Plan? IATF 16949 - Automotive Quality Systems Standard 5
D Supplied Product on Control Plan - Lot ranging in 40,000 pcs per product FMEA and Control Plans 3
M Is there any pre-defined Control plan format/template acc. VDA? VDA Standards - Germany's Automotive Standards 0
G Control Plan - Include the processes for each sub component? APQP and PPAP 2
A Redesigning our process flow chart, PFMEA and Control Plan Process Maps, Process Mapping and Turtle Diagrams 4
D Link between FMEA, flow chart and control plan FMEA and Control Plans 10
M Dynamic Control Plan Draft - need review FMEA and Control Plans 2
Ashland78 IATF 16949 Control Plan Authorizations IATF 16949 - Automotive Quality Systems Standard 2
N Control plan evaluation methods - Which methods should be carried over from the PFMEA? FMEA and Control Plans 3
Rameshwar25 What is a Control Plan at "Material Level"? IATF 16949 - Automotive Quality Systems Standard 4
L Control Plan - Multiple Process Steps FMEA and Control Plans 8
O Difference Between PFMEA & Control Plan FMEA and Control Plans 3
W Purchased Part Control Plan (IATF 16949) FMEA and Control Plans 7
J VDA audit, control plan - My hair is almost gone now VDA Standards - Germany's Automotive Standards 5
Howard Atkins MSAs are now required on every feature of the control plan - IATF 16949 IATF 16949 - Automotive Quality Systems Standard 13
Jeff Putman EQI Prelaunch Control Plan - Definition Customer and Company Specific Requirements 0
N Control plan references FMEA and Control Plans 6
L Simple Example for PFMEA / Control Plan Training Training - Internal, External, Online and Distance Learning 1
J Functional group / area responsible on a Control Plan IATF 16949 - Automotive Quality Systems Standard 1
T Should Testing be a separate operation in the Control Plan? FMEA and Control Plans 5
T IATF 16949 Control Plan and Process Monitoring Requirement(s) IATF 16949 - Automotive Quality Systems Standard 1
J Why Control Plan Review needs to be Approved by the Customer IATF 16949 - Automotive Quality Systems Standard 1
B PFMEA and Control Plan Links APQP and PPAP 2
A Corrective Action Column in Control Plan and aligning PFD, PFMEA and Control Plan FMEA and Control Plans 6
M Control Plan MSA's - Pressure Gages IATF 16949 - Automotive Quality Systems Standard 2
S Family / Generic type of FMEA & Control Plan and Symbols FMEA and Control Plans 3
V Do I need to add everything on print to control plan? FMEA and Control Plans 1

Similar threads

Top Bottom