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Sample Size Calculation based on the results

Dear all

I have a scenario as below

for a product the upper and lower specification is given as below

Upper spec 19.00mm

Standard 18.00mm

Lower spec 17.00mm

my client is having ranges as below

Range 1

Upper spec 19.0 to 18.75

Lower spec 17.0 to 17.25

Range 2

Upper spec 18.75 to 18.50

Lower spec 17.25 to 17.50

Range 3

Upper spec 18.50 to 18.25

Lower spec 17.50 to 17.75

Range 4

Upper spec 18.25 to 18.00

Lower spec 17.75 to 18.00

a) Initially the sample size is 50%. Starts with range 4 .

b) if consecutive 5 receipts are ok we want to switch to range 3 - sample size 25%.

c) if consecutive 5 receipts are ok we want to switch to range 2 sample size 10%

e) and range 1 sample size 5%.

f) if there is any rejection at any range, then reset to range 4.

g) if out of specification noticed then the next incoming material will be inspection in the next lowest range. ie in range 1 out of specification noticed shift to range 2 in the next Goods receipt.

I know that Sampling scheme can be used but how to link the specifications in it.

How to link this in SAP QM.

awaiting for your valuable feed back Please.

--

Regard

P.Srihari

Former Member
Former Member replied

Hi Sri,

As per your requirement you have to create 4 MIC as well as 4 DMR follow the below step.

1. Create MIC1,MIC2,MIC3,MIC4

2. Create DMR1,DMR2,DMR3,DMR4

3. Assign the DMR at MIC level.

a) Go to QP01 In Header data screen choose Dynamic mod. level DMR at character level. (Don't assign any DMR here)

b) In Characteristics screen assign DMR to MIC

(Range1) MIC1 - DMR1

(Range2) MIC2 - DMR2

(Range3) MIC3 - DMR3

(Range4) MIC4 - DMR4

Save the Inspection plan.

DMR detail explaination

As per your requirement MIC4 will be initially inspected (ie: range 4) and remaing MIC all are after 5 consecutive lots if any rej at any stage again inspect the Range4.

DMR1: Create 2 Stage (1st is SKIp 2nd is Inspection)

Stage1: Start with Initial stage, Tick in SKIP, and Maintain No Skip as 15 (Bcz your case You need this MIC1 after 15 lot (555)), Skip duration 999 (Bcz your case days not consider) New Stage 2 (Bcz after complete the 15 lot it will go to 2nd stage for Inspection.), Rej 1 , New Insp 1 (Bcz rejected means MIC1 is not required)

Stge:2, Insp Sev 4, Ist Enter Description as Inspection required and press enter.

In another small popup screen enter no of Inspection 5 , New Stage as 2, Rej 1, New 1,

DMR2: Create 2 Stage (1st is SKIp 2nd is Inspection)

Stage1: Start with Initial stage, Tick in SKIP, and Maintain No Skip as 10 (Bcz your case You need this MIC2 after 10 lot (5+5)), Skip duration 999 (Bcz your case days not consider) New Stage 2 (Bcz after complete the 10 lot it will go to 2nd stage for Inspection.), Rej 1 , New Insp 1 (Bcz rejected means MIC2 is not required)

Stge:2, Insp Sev 4, Ist Enter Description as Inspection required and press enter.

In another small popup screen enter no of Inspection 5 , New Stage as 1, Rej 1, New 1,

DMR3: Create 2 Stage (1st is SKIp 2nd is Inspection)

Stage1: Start with Initial stage, Tick in SKIP, and Maintain No Skip as 5 (Bcz your case You need this MIC3 after 5 lot ), Skip duration 999 (Bcz your case days not consider) New Stage 2 (Bcz after complete the 5 lot it will go to 2nd stage for Inspection.), Rej 1 , New Insp 1 (Bcz rejected means MIC3 is not required)

Stge:2, Insp Sev 4, Ist Enter Description as Inspection required and press enter.

In another small popup screen enter no of Inspection 5 , New Stage as 1, Rej 1, New 1,

DMR4: Create 2 Stage (1st is Inspection 2nd is Skip)

Stge:1, Insp Sev 4, Start with Intial stage Ist Enter Description as Inspection required and press enter.

In another small popup screen enter no of Inspection 5 , New Stage as 2, Rej 1, New 1,

Stage2: Tick in SKIP, and Maintain No Skip as 999 , Skip duration 999 (Bcz your case days not consider) New Stage 2, Rej 1 , New Insp 1 (Bcz rejected means again inspect the MIC4)

Note: Read step by step.

Revert further clarification.

Regards,

S.Babusingh

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