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C4. Test for Special Causes of Variation

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hi welcome back in this section we will

explore a little deeper what is the test

for special causes as mentioned

naturally speaking he process output has

a random very shoddy embedded on it

therefore there is common causes of

variation that is always present but

there are cases that there are presence

of what we call special causes this are

causes that cost

the points to fall beyond or below the

control limits signaling a problem

inside your process now we have eight

tests for special causes of variation

when we say special costs of very short

these are about patterns what we studied

about analyze phase we have trend cycles

and shift one of the most used special

causes for aberration test is what we

call test one for any points Beyond or

below the plus three minus three

standard deviation from the center line

test two to test eight talks about the

different patterns that we can see

inside a control chart you don't have to

memorize this special costs very short

but we just want you to understand that

on top of the usual rule test one there

are other ways on how to detect special

causes of variation in order for us to

see patterns and in order for us to

predict whether there will be a problem

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YouTube Transcript:C4. Test for Special Causes of Variation

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YouTube Transcript:
C4. Test for Special Causes of Variation