Sampling scheme

[Former Member]

Gurus,

I have created a sampling scheme & assigned it in sampling procedure.When i record results if the sample size is 15 if i have

inspected only 12 & enter the value the system is giving an error msg,

Diagnosis

You can directly confirm the number of nonconforming units or the system calculates the number of nonconforming units from the number of sample units beyond the tolerance range.

System Response

The number of nonconforming units cannot be greater than the number of inspected test units.

Procedure

Check and correct your entry.

What should be done to overcome this bcoz in real time all the sample might not be inspected

[former_member42743 · Accepted solution]

Are you sure you had the numbers in the right colums? I've found that people easily confuse and put the wrong values in the colums "No. inspected" and "No. defects".

Also, what was the scope you set for your characteristics?

If you had fixed scope on the characteristics, the system is expecting 15 results and will throw errors if you don't record 15.

From your error message however, it looks like you have attempted to record a higher number of defective units then what was inspected. So if you make 1000 widgets and in QM you are inspecting 15, you can't record more then 15 defective units. If you inspect more then 15, then you have to change the number of inspected units to the actual number of units you actually inspected. Then you can confirm up to that many defective units.

Craig

[Former Member · Accepted solution]

HI,

The scope is not fixed scope & it is allowing me to enter the more qty than the sample size but not less the sample size.

[former_member42743 · Accepted solution]

What is the scope you used? There are four scope settings. If you have the scope set as Larger scope then you can record more values then calculated, but not less.

Craig

[Former Member]

Its always better not to change the status of char ( form 2 to 3 or 5) when you have result recorded les that the sample size.

System has to get the input for non confirming units which either you have to put or system has to calculate from your entries.This has to be on the basis of sample size.

So do not valuate or close char.

Regards

Sujit

[Former Member]

HI,

i am able to get ur point,can u explain in a simple way

[Former Member]

In simple way ,"If you have to valueate & close the char you must enter equal to or more than sample size readings"

If you enter less reading then better not valuate untill all readings are entere.

This will help you to complete the incomplete char afterwords