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Sample size calculation

Dear Friends,

I have a question regarding sampling size calculation

In a inspection plan A , i have inspection charecteristics 1, 2,3,4

Inspection Charecteristics 1 - sampling procedure A ( Fixed sample )

Inspection Charecteristics 2 - sampling procedure B ( 100 % Sample )

like this i have many sampling procedure with different sample type

now while creating inspection lot , system automatically calculate sample size on the basis of sampling procedure

just want to know how the system will behave and calucalate the inspection sampling size

Thanks & Regards

Raj

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3 Answers

  • avatar image
    Former Member
    Apr 13, 2009 at 08:55 AM

    Hi

    Rajkumar

    Lets take Your Example....

    Inspection Charecteristics 1 - sampling procedure A ( Fixed sample ):-->for this char sample size will be determained by fixed sampling say u have maintained 10 Ns

    Inspection Charecteristics 2 - sampling procedure B ( 100 % Sample ) --->for this char sample size will be 100% ie equal to lot size.

    lets consider you have 2 more char as

    Inspection Charecteristics 3-->sample size is 20 as per sampling procedure.

    Inspection Charecteristics 4-->say sample size is 40 as per sampling procedure

    Now the sample size of char 1,2,3,4 are (for lot size 100) -


    >10,100,20,40(respectively)

    So Overall sample size of lot is maximum of char 1,2,3,4 ie 100

    so sample size is 100.

    Now one more imp thing...

    If any of the char is skipped(char based DMR) then sample size is ZERO

    if Char is Not required then sample size is ZERO

    I hope you understand

    Sujit

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    Former Member
    Apr 14, 2009 at 09:39 AM

    Hi Raj ,

    Sujith has given you step by step clear idea ,

    Just some addition for this

    In the routing you will be having set of inspection characteristics, based on the sampling procedures maintained for the the insp characteristics, each character will be inspected based upon it's own sampling size . so every characteristic will be checked in a different lot size( it's own relevant).

    thanks

    Ankaiah

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  • Apr 14, 2009 at 10:24 AM

    Dear All,

    Many Thanks

    Raj

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