Process capability index - measure of inherent capability, Operation Management

Assignment Help:

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.


Related Discussions:- Process capability index - measure of inherent capability

Explain what behaviours destroy trust, Earlier in the class, we noted that ...

Earlier in the class, we noted that communication is the glue holding organizations together. We might say that trust is the "oil" of the organization. With it, processes can opera

Explain mitigate the anticipated difficulty, From the e-Activity, analyze t...

From the e-Activity, analyze the process of statistical quality control and determine which part of the process would be most difficult for you personally as well as what steps you

How x control chart is used, How X control chart is used? X control cha...

How X control chart is used? X control chart is used with go and not go inspection.

Explain when the doctor dictates a decimal such as point1, What do you do w...

What do you do when the doctor dictates a decimal such as "point 1"?

Explain what kind of warning signals would you like, 1. What kind of warnin...

1. What kind of warning signals would you like fed back from PAC to MRP? 2. Lead times are sometimes called rubbery. What accounts for this concept of elasticity in lead times?

Explain what are three factors that affect capacity usage, What are three f...

What are three factors that affect capacity utilization? Provide examples.

Explain what key technological features of sap, What key technological feat...

What key technological features of SAP set it apart from conventional business accounting/planning/control software?

Depict serializability graphs, Draw serializability (precedence) graphs for...

Draw serializability (precedence) graphs for the following schedules and state whether each schedule is (conflict) serializable. For each serializable schedule, determine the equiv

Explain what is the annual rate of return, You discover an antique in your ...

You discover an antique in your attic that you purchased at an estate sale 10 years ago for $400. You auction it in eBay and receive $8000 for your item. What is the annual rate of

Explain the quality control implications of the major change, in a 3-4 page...

in a 3-4 page paper answer the following: Q1. Describe the quality control implications of the major changes that have taken place in food chains today compared to the past. Q2. Wh

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd