# Sampling Plan Control Frequency

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### #1 QA2021

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Posted 15 April 2021 - 12:19 PM

Hello everyone,

We are producing food for animals and humans and i need to implement a sampling plan to control all our outgoing products.

for the frequency of control i will use this formula

frequency = production/100 x chance x seriousness.

this is the GMP+ requirement.

Do you think that i can use it also for human food?

Best regards

QA

### #2 Charles.C

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Posted 15 April 2021 - 03:21 PM

Hello everyone,

We are producing food for animals and humans and i need to implement a sampling plan to control all our outgoing products.

for the frequency of control i will use this formula

frequency = production/100 x chance x seriousness.

this is the GMP+ requirement.

Do you think that i can use it also for human food?

Best regards

QA

Hi QA,

I think you lost a square root somewhere.

The "origin" and application of formula are described here -

The formula appears to require a lot of "informed" guesses ( as do most other methods of course )

Unfortunately not many worked examples are given.

Kind Regards,

Charles.C

### #3 QA2021

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Posted 15 April 2021 - 04:42 PM

Hi QA,

I think you lost a square root somewhere.

The "origin" and application of formula are described here -

The formula appears to require a lot of "informed" guesses ( as do most other methods of course )

Unfortunately not many worked examples are given.

Yes you are right. I forgot the square root.

Do you think that this formula could work for bulk product (milk, chocolate in powder)?

I apply it only for animal food for the moment.

### #4 Charles.C

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Posted 15 April 2021 - 05:42 PM

Yes you are right. I forgot the square root.

Do you think that this formula could work for bulk product (milk, chocolate in powder)?

I apply it only for animal food for the moment.

Hi QA,

I would like to see the justification for the formula.

Kind Regards,

Charles.C

### #5 QA2021

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Posted 15 April 2021 - 06:36 PM

Which judtification?

I didn't find any formula that's why i will use this one. Do you have any othee example that could be used for liquid (milk) and powder( chocolate)?
I made a lot of random analysis and i have a statistical datas of differents parameters( microbiology, heavy metals, fats...) But i don't know how to use those datas to establish a control frequency ?

Regards

### #6 Charles.C

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Posted 16 April 2021 - 12:49 AM

Which judtification?

I didn't find any formula that's why i will use this one. Do you have any othee example that could be used for liquid (milk) and powder( chocolate)?
I made a lot of random analysis and i have a statistical datas of differents parameters( microbiology, heavy metals, fats...) But i don't know how to use those datas to establish a control frequency ?

Regards

Hi QA,

I am not a statistical expert however this link is an illustration of one reason for my question -

https://variation.co...-sampling-rule/

Kind Regards,

Charles.C

### #7 Scampi

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Posted 16 April 2021 - 11:17 AM

1)  i hope your not making human grade food on the same line as animal feed.....

2) i wouldn't use the same frequency for human grade---that would require you to assume the risks are the same---they are not

The two materials you mentioned (flour and chocolate) should both arrive with a certificate of analysis.  Flour for ecoli in particular and chocolate for salmonella and ecoli

Please stop referring to me as Sir/sirs