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Capability studies in Process Plants - E-coat of galvanized flat carbon steel coils

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FlavioLima

#1
Hello Folks, :)

We've been studied usage of capability indexes of our process of e-coated of flat carbon steel coils (galvanization).
Some "experts" said those indexes (Cp, Cpk) aren't :nope: suitable to the nature of our process and others said exactly opposite :yes: .
Have someone of you applied those indexes to a process plant? Or have some indication or papers related to similar situation?
Thanks in advance for helping and best regards :bigwave: .


FL​
 
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#2
FlavioLima said:
Hello Folks, :)

We've been studied usage of capability indexes of our process of e-coated of flat carbon steel coils (galvanization).
Some "experts" said those indexes (Cp, Cpk) aren't :nope: suitable to the nature of our process and others said exactly opposite :yes: .
Have someone of you applied those indexes to a process plant? Or have some indication or papers related to similar situation?
Thanks in advance for helping and best regards :bigwave: .


FL​
This would depend on what you are measuring. The thickness of the coating can be measured and a Cpk calculated. Process parameters such as temperature or voltage may also be measured and a Cpk calculated.

Now, if the question were the suitability of using SPC, I would agree if the parameter is already under the control of some type of automatic controller. SPC would be redundant, and the SPC charts would show many, many runs of data.
 
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