Valuation sampling procedure , based on serial number (PC)

[Former Member]

I am using sampling scheme for the sampling procedure. The sampling procedure uses multiple samples(dependant multiple samples) and Valuation rule        66 ( for  Dependent multiple samples)
The quality plan is used for the inspection lot origin 01 (incoming inspection). This Q-plan has 5 different characteristics to be inspected. Serial numbers are used. That means, I want to do result recording for each serial number and each of 5  characteristics for that serial number.

The problem is that the evaluation (based number of nonconforming units) is done on characteristic level, and not on serial number level.
Let assume the inspection lot size is 50 PC and the sample size is 5+5 PC (first and 2nd sample)

The first serial number has a problem on characteristic 1, second on characteristic 2 ..and so on ..., fifth on characteristic 5.
No one characteristic is rejected because there is only one FAILURE , (still accepted by the sampling scheme), But all 5 pieces (serial numbers) are faulty and I have to take the 2nd sample.

So I need the evaluation based on serial number and not on the characteristic level: Is that possible in QM? 
If there is 1 problem in 1 serial number then this serial number shoud be a faulty one and the sampling scheme should be defined on the serial number level and not on characteristic level.

[Martin_H]

Have you assigned a serial number profile and activated single unit inspection?

MH

[Former Member]

Yes I hve done this. The serial number profile has serial numbers 02 (optional) and the equipment also 02. (Equipment is required). The serial numbers are available in inspection lot.

Single unit inspection is defined in MIC.

[Former Member]

The lot valuation is done folr the lot and not for the individual serial no. You need assign the serial no during stock posting. If you are having single result recording you can enter the serial nos in result recording by selecting the mic and clicking on the lense icon. But only you can do the evaluation but you cant control the stock posting.

Regards,

Smruti

[Former Member]

I know the lot is valuated with UD (usage decision). Is that what you mean?

My problem is that the evaluation is done on characteristic and not on number of faulty serial numbers. I want to change valuation which is defined on sampling procedure level ( Valuation rule        66) . This valuation rule is valid for each single characteristic. I want to take 2nd sample only if certain count of serial number are faulty. And not if certain serial numbers have a problem with single characteristic only.

The sampling scheme is defined as below:
Lot size/ Sample size / acceptance nr./ rejectance nr.(1st and second sample)

              15      2           0 1           0 1

              25      3           0 1           0 1

              50      5           0 1           0 1

              90      8           0 1           0 1

             150      13         0 1           0 1

             280      20         0 1           0 1

             500      32          0 1           0 1

            1200      50         0 2           1 2

            3200      80         0 3           3 4

           10000      125      1 4           4 5

           35000      200      2 5           6 7

          150000      315      3 7           8 9

          500000      500      5 9           12 13

     10000000000  800       7 11         18 19

Can be this scheme valid for number of nonconforming serial number? It is currently valid for number of nonconforming serial numbers within one chacacteristic only? I need to force the system to ask me for the second sample after all characteristics are valuated. (and not after each characteristic is valuated).

[former_member42743]

You can have your ABAP'er define your own valuation rule which is what I think you'll have to do.

I don't think you'll be able to do what you want however as the valuation rule is still at the characteristic level.  But I'm not sure.  The sampling table you show is a pretty typical one.  My understanding is as follows:

90 units, all serialized

Char A  Fail unit 17, 20, 77

Char B  fail unit 20

Char C Fail unit 54

In the above scenario, you only want to fail serial # 20 because it failed on two characterisitcs.  But the other items, 17, 77, and 54 are considered passed.  Is this correct?

If so, i don't think you do it.  Which characteristic do I report item 20 as truly failing?  Maybe you can right the valuation rule to check any previous characteristics and see if the same unit failed on another characteristic.  If so then fail it on the charactersitics currently being valuated.  But this logic could be fraught with all types of "what if".

Also, since the stock posting is actually a separate activity from the results valuation, you would still have no automatic way of posting certains serial numbers to blocked stock.  You still have to manually do that as far as I know.

Joe FF

[Former Member]

Hello Joe,

I want to report all units wit failure in at least one characteristic as a faulty item.
That mean (in your example): Failed units are 17,20.54 and 77. OK units are the other 86 PCs.
Because 4 failed units I want to have second dependant sample of next 90 PCs. ( the system should offer to me to take 2nd sample)

90 units, all serialized (4 faulty units, 86 OK)
Char A  Fail unit 17, 20, 77
Char B  fail unit 20
Char C Fail unit 54

The function module used for valuation is: QEBR_DEP_MULT_SAMPLING.
Maybe I can replace this function module with another one? Is there any standard function module which could fulfill my requirements?  If not, then I think the new must be written what is not so easy.

The stock posting is not problem I can do it manually.