Manufacturing capabilities (SPC introduction) ─ck of the process capabilities explained

CK's process capabilities explained

A=m-x:	Represents the distance between the center of the scale (i.e. the center of the product's expectation) and the center of the physical building.
B=T/2:	Represent half of the spec.

So, when ck=a/b=m-x/(T/2) is written in words, it is: In fact, the central position is offset by the size of the predetermined center value m-x the ratio of half of the scale.

So
	Ck=0	Represents the center value of the manufactured product.
	Ck=1	It represents the center value of the manufacture and the expected value of the heart is just about half the spec. That is, X is just the upper or lower limit of the spec.

C K's Rating

Rating	Scopes						Explanation
A			Ck	≦	12.5%		Good, continue to hold.
b	12.5%	The	Ck	≦	25%		Should be adjusted to improve to grade A.
C	25%	The	Ck	≦	50%		The operator may look at the wrong spec, or do not operate in accordance with the standard, and must be trained to check the rules and standards.
D	50%	The	Ck				Need to take urgent measures to comprehensively examine the cause of the bad, when necessary to stop the machine.

Manufacturing capabilities (SPC introduction) ─ck of the process capabilities explained