Control chart - sample mean chart & sample range chart, Operation Management

Control Chart - Sample Mean Chart & Sample Range Chart

As sample values are progressively plotted on the charts, they are examined for patterns which may be tested against a set of rules-of- thumb, as shown in the figure overleaf. This figure shows some examples of limits being exceeded. For example, if a single sample means breaches an action limit, the probability (1-in- 1000) that this would be obtained from a stable process is so low it is deemed to be more likely that the process has changed. The process should be stopped and investigated. If within any sequence of 10 plots you find one above the upper warning limit and one below the lower warning limit, this is statistically so unlikely that you should stop the process to investigate. Similarly, the occurrence of two consecutive sample means breaching a warning limit is so unlikely that, again, the process would be stopped and investigated.

895_Control Chart - Sample Mean Chart & Sample Range Chart.png

Posted Date: 3/15/2013 6:11:08 AM | Location : United States







Related Discussions:- Control chart - sample mean chart & sample range chart, Assignment Help, Ask Question on Control chart - sample mean chart & sample range chart, Get Answer, Expert's Help, Control chart - sample mean chart & sample range chart Discussions

Write discussion on Control chart - sample mean chart & sample range chart
Your posts are moderated
Related Questions
What are "competencies?" Explain, and provide two or three examples.

Were the British more responsible for losing the war or were the colonists more responsible for winning it? Use specific examples from this week's readings to support your respons

You are talking with another MIS 200student who is complaining about having to learn about the information systems development life -cycle (SDLC- Chapter 6), because he is not goin

How does the stop process enter into the planning process?

Q 1 The capability index (Cpk) calculates the percentage of items being produced within specifications. Q 2 Design quality in products refers to the degree to which a product or

Is it selfish to prefer (saving) one's own life to that of others?

describe stores management and its function

Demand during lead-time for HP printers at a Sam's club store is normally distributed, with a mean of 500 and a standard deviation of 150. The store manager continuously monitors i

To be a true strategic partner, does HR need to take on a more generalized or specialized approach to work? Why?

Think about any class (undergraduate or graduate) in which you worked on a class project. Think about the process you went through in order to complete this final project. a. li