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How SAP calculate sample size in presence of sample drawing procedure

Posted on Aug 01, 2009 at 12:56 PM 155 Views

hi

i need to know how SAP calculates the lot's sample size in the presence of sample drawing procedure, and when should i apply sample drawing procedures (sample management) ?

PLM Quality Management (QM)
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    author's profile photo Nehal Khamar
    Nehal Khamar
    Posted on Aug 03, 2009 at 04:36 AM

    A sample-drawing procedure contains specific instructions for creating physical samples with respect to a specific inspection lot container type and specific partial-sample numbers in the inspection plan.

    In the sample-drawing procedure, we can specify:

    Which categories of physical samples must be drawn

    How many physical samples must drawn

    The size of each physical sample

    Whether the drawing of physical samples must be confirmed

    I would suggest just refer this [link|http://help.sap.com/saphelp_erp60_sp/helpdata/en/2d/35208b448c11d189420000e829fbbd/frameset.htm] & reply if you need more clarification.

    Thanks!!!

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    • Former Member Former Member
      Aug 18, 2009 at 07:39 AM

      first of all i want to thank you a lot for your great concern, but i don't think you got my point so let me clarify it again.

      let's say we are on production line, and today we have to produce 1000 pcs. we assigned inspection points to check every 100 pcs, which mean we have 10 inspections (record results 10 times for one inspection lot).

      what i want to understand now what will happen with the process of taking samples.

      case 1) well we take a sample every 100 pcs (and in this case the sample will be the whole sample size of the lot divided by 10 which is the number of my inspections),

      or

      case 2) we will take one sample @ the beginning (and in this case the sample will be the whole sample size of the lot) and we enter the results every 100 pcs.

      for me, the logic says that we take a sample every 100 pcs (case 1), as it makes nonsense if i took my whole sample quantity at the begining and recorded the results 10 times because this is the sample for the 1st 100 pcs, i didn't take samples from the next 900 pcs. but i don't really know what SAP do with this, is it the first case or the second or something else ??

      i hope that i clarified my point to you and wish you can help me with it, and thanks a lot again for your great concern and patience.

      Regards,

      Mahmoud Osama

  • author's profile photo Former Member
    Former Member
    Posted on Aug 03, 2009 at 05:21 AM

    Hi

    i need to know how SAP calculates the lot's sample size in the presence of sample drawing procedure, and when should i apply sample drawing procedures (sample management) ?

    I hope you must have gone through the posts alreay have on SDN.

    I will just share my thoughts for the same in simple terms....

    SAmple drawing procedure is the way you want to draw & how much you want to draw the sample.

    This is used specifically in Process/chemical/pharma industry.

    sample are either drawn by sample drwing procedure or fixed sampling...

    but the difference in by sample type.

    Majorly these are Pooled sample or Primery sample(or many cases reserve samples).

    Primery sample are the samples which are as name suggest are initial sample drawn for testing.

    Pooles samples are drawn in addition to what primery samples are.

    so the sample size is calcualted based on primery (if only primery sample is specified) or based on both Pooled & priemry...

    so either fixed or using sampling scheme the sample size will be calculated.

    please refer the chart given on SAP help.

    I hope this will add some value

    Regards

    Sujit

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    • Former Member
      Aug 03, 2009 at 06:11 AM

      hi sujit

      ur point is good and making the issue a bit clearer for me, but let's clarify it more with an example if you don't mind

      assume that i'm having a lot of size 200 EA, and i'm applying a SAMPLING PROCEDURE for example "X01" of sample = 1 and base = 10, so the sample size will be 10 EA, which is logical and i understand this, the problem happens if i applied a SAMPLE DRAWING PROCEDURE in the presence the of the previous SAMPLING PROCEDURE assigned to the MIC (characteristic), the sample size of the lot will not be 10 EA, which i don't understand how it is calculated....i hope u can help with this, and thanks a lot for ur help and concern