4 replies to this topic

[Jymze]

How can product quality assessment be represented statistically? E.g, out of 8 pallets of a particular product produced in an 8 hours shift, how can the quality of this product be represented statistically? 

[mohamed ahmed yusuf]

Hello James, 

Would you mention one measure that you looking for in your product such like moisture , color or anything else ? 

[redfox]

Hello James,

 

 

Please see attached files on sampling plan. It may help.

 

regards,

redfox

 

 Sample Size Chart_ ifsqn2.pdf   66.55KB   36 downloads

 Sample Size for Zero Nonconforming Items.pdf   170.24KB   44 downloads

 Sample Size_ifsqn1.pdf   317.82KB   34 downloads

 The Special Inspection Levels in the AQL Tables_ifsqn3.docx   89.63KB   36 downloads

[Gerard H.]

Dear James,

 

It's important to make clear definitions, before applying statistical analyses:

• Your process needs to be controlled and it's necessary to know what parameters are already measured
• The quality of the particular product has to be well defined
• The product sampling method needs to be well described (and followed)

Kind regards,

 

Gerard Heerkens

[Charles.C]

How can product quality assessment be represented statistically? E.g, out of 8 pallets of a particular product produced in an 8 hours shift, how can the quality of this product be represented statistically? 

 

I interpret "represent" as "estimate". I assume a random sample.
 

The simplest answer is by the Average Value plus  a confidence level.

 

Not so easy if it's smell of course.

 

Also see this post whose middle file has many examples of "quality" -

 

http://www.ifsqn.com...ng/#entry126033