"Product" and "Process" columns in CP - what to put there?

[Cari Spears]

I used to work at a place that made clutch plates.

Process: Apply glue to raw steel core.

Product Characteristic: glue thickness
Process Characteristic: glue viscosity, oven temperature, oven cycle time.

Process: Bond friction material to steel core.

Product Characteristic: clutch plate thickness
Process Characteristic: bonder platen temperature, bonder platen pressure, bonder cycle time.

 

[Jim Wynne]

I used to work at a place that made clutch plates.

Process: Apply glue to raw steel core.

Product Characteristic: glue thickness
Process Characteristic: glue viscosity, oven temperature, oven cycle time.

Process: Bond friction material to steel core.

Product Characteristic: clutch plate thickness
Process Characteristic: bonder platen temperature, bonder platen pressure, bonder cycle time.

Excellent examples.

 

[pratishesh_72]

My field is microelectronics.
I know the definition written in the APQP book:

Characteristics:
19) "Product - features or properties of a part, component or assembly that are described on drawings or other primary engineering information.

20) Process - process variables that have a cause and effect relationship with the identified Product characteristics."


PF steps:
1) Wafer fabrication (Sub-contract)
2) Incoming inspection wafer
3) Probing (Chip Test)
4) Off-line inking
5) Outgoing Inspection Wafer
6) Wafer packaging
7) Shipping
8) Assembly (Sub-contract)
9) Inspection assembled devices
10) Final Test
11) Outgoing Inspection QCel
12) Outgoing Inspection assembled devices
13) Packaging and shipping

I'm not so confident about what to put in each column.
I'm not sure what is the difference between process and product related characteristic.

Are all process characteristics variables only? What about the attributes?

Dear friend ,

If I assume your product as an electronic assembled component.
These requires some process as mentioned above.
Like for ex wafer Packaging ,
If the output of this process is packaged item with certain conditions as per your standards.

These standards for this process becomes the Product attributes.
the opposite of these or not achieving these standards is called as Failure mode.
Now the causes are not only process paramters , but can be problem of the material you use , human erros , so on and so forth which are all arrived at based on the techincal brain storming and validation of these causes.

So FMEA is more or less common sense approach to eavluate the causes and their effect on failure of the product.

Hope I have made some point here.

thank You
Pratishesh.

 

[6sigmaBBsphinx]

I am working In inkjet cartridge bottle assembly plant:
am i doing the right thing in my Cp?

Process: Filter Welding

Product char: No bent filter
Process Char: No mis aligned filter during robot picking

or should it be:?

Product char: Bent filter
Process char: mis aligned filter during picking

 

[Stijloor]

I am working In inkjet cartridge bottle assembly plant:
am i doing the right thing in my Cp?

Process: Filter Welding

Product char: No bent filter
Process Char: No mis aligned filter during robot picking

or should it be:?

Product char: Bent filter
Process char: mis aligned filter during picking

Hello 6sigmaBBsphinx,

A Product Characteristic is typically expressed in terms of something that is required and/or desirable. Such as in your example: "No bent filter."

A Process Characteristic is something associated with the PROCESS that must be controlled to prevent "bent filters" from happening. Your Process FMEA, should give you that information.

Also, look at the excellent posts in this thread.

Hope this helps.

Stijloor.

 

[6sigmaBBsphinx]

Hello 6sigmaBBsphinx,

A Product Characteristic is typically expressed in terms of something that is required and/or desirable. Such as in your example: "No bent filter."

A Process Characteristic is something associated with the PROCESS that must be controlled to prevent "bent filters" from happening. Your Process FMEA, should give you that information.

Also, look at the excellent posts in this thread.

Hope this helps.

Stijloor.

Does it basically means that i should put it like this:

Product char: No bent Filter
the corresponding Process Char: Alignment of Filter during Robot picking

or what specific area in the PFMEA that describes the Process Characteristics?

I get the product characteristic from Potential Failure mode

 

[Stijloor]

Does it basically means that i should put it like this:

Product char: No bent Filter
the corresponding Process Char: Alignment of Filter during Robot picking

Yes, I believe so. Feel free to provide more examples if you wish.

Once the Control Plan is in place, continuous monitoring of the process will show if you selected the correct process characteristic.

Stijloor.

 

[6sigmaBBsphinx]

Heres another Example:

Process: Barcode Application

Product Char: No mis aligned Barcode

Process Characteristics: Defective Tamp cyliner

please comment

 

[Stijloor]

Heres another Example:

Process: Barcode Application

Product Char: No mis aligned Barcode
Process Characteristics: Defective Tamp cyliner

please comment

What do you do in the PROCESS to PREVENT mis-aligned barcodes?

For example, does someone verify the "tamp cylinder" at a defined frequency?
Is there something in, or on the machine that prevents this?

 

[6sigmaBBsphinx]

What do you do in the PROCESS to PREVENT mis-aligned bar codes?

For example, does someone verify the "tamp cylinder" at a defined frequency?
Is there something in, or on the machine that prevents this?

The defective tamp cylinder was the Potential cause of failure as being called out in the PFMEA.. and the current control is Preventive Maintenance.

Where in PFMEa should i refer for the Process Characteristics?