Process capability index - measure of inherent capability, Operation Management

Process Capability Index - Measure of the Inherent Capability

This index provides a measure of the inherent capability of a process by simply relating the 6σ spread of the process to the tolerance band. The assumption is made that the mean m of the process lies at mid- tolerance, as shown in the figure below. If the Cp index is less than 1, then a significant proportion of the process output will be out with specification, even when the process mean is centred within the tolerance band.

74_Process Capability Index - Measure of Inherent Capability.png

If the Cp index value is equal to 1, then, provided the process mean is centred within the tolerance band, only 3 parts per thousand (0.3 per cent) will be outwith the specification. If the Cp index value is greater than 1, and the process mean is centred, then a correspondingly higher proportion of the output will conform to specification. For example, GE/Motorola's six-sigma (ie ±6 sigma) programme equates to a Cp index value of 2, and a non- conformance rate of 3.4 parts per million.

Posted Date: 3/16/2013 1:24:55 AM | Location : United States







Related Discussions:- Process capability index - measure of inherent capability, Assignment Help, Ask Question on Process capability index - measure of inherent capability, Get Answer, Expert's Help, Process capability index - measure of inherent capability Discussions

Write discussion on Process capability index - measure of inherent capability
Your posts are moderated
Related Questions
You are the newly appointed assistant administrator at a local hospital, and your first project is to investigate the quality of the patient meals put out by the food-service depar

Fraction Defective P Chart - Control Charts for Attributes This type of chart is used when it is impractical or inconvenient to maintain a constant sample size. Instead of pl

The acronym SDLC normally relates to It relates to system (or software) development lifecycle

Since May of 2005, the purchase manager at a department store has been using a 4-period moving average to forecast sales in upcoming months. Sales data for the months of January th

power electronic buys 45ohm resistor, standard deviation for this register is 4ohm.sample size of n=

Preparing the Research Design: Research design is the conceptual structure within which research should be conducted. A research design specifies the methods and procedure fo

1. If, instead, a constant sample size of 100 is chosen, determine the np-chart control limits. A later sample produces 15 defectives: what conclusion can be drawn?  2. 1000 bot

Affirmative action refers to a policy or a program that tries to respond to instances of past discrimination by implementing proactive measures to ensure equal opportunity today. I

Identifying Opportunities Select a company described in the Wall Street Journal, Fortune, Forbes, or another reputable business application. Visit the company%u2019s Web site to

what are stra thetegies used in TQM to deal with issue of cost of quality