2 Histogram
This document was uploaded by user and they confirmed that they have the permission to share it. If you are author or own the copyright of this book, please report to us by using this DMCA report form. Report DMCA
Overview
Download & View 2 Histogram as PDF for free.
More details
- Words: 323
- Pages: 7
vision,
Objective To understand histogram
Content owner,
Date: 07/12/09 , ISO No
1
vision,
Why would you like to use this tool (deliverables)? • To display and understand how a set of data points are distributed. • To illustrate the variability in a process.
Content owner,
Date: 07/12/09 , ISO No
2
vision,
When would you use this tool (context)? • When you want to understand if a process is under control. • When analysing a process. • When you want to validate process changes. • When monitoring a process on a continuous basis.
Content owner,
Date: 07/12/09 , ISO No
3
vision,
How to use this tool (steps)? 1 Collect the data – measurements of the variable you arewishing to present in the form of a histogram. 2 Define a range for the histogram – upper and lower limits that include all of the data points. 3 Divide the range into a number of equal intervals. Use 5 to 7 intervals if less than 50 data points have been collected; 10 to 20 intervals for more than 250 data points. 4 Count the number of data points (occurrences) in each interval and construct the histogram – see below. 5 Write the Number (N) of data points collected on the histogram. Content owner,
Date: 07/12/09 , ISO No
4
vision,
Content owner,
Date: 07/12/09 , ISO No
5
vision,
How to make the best use of the tool (tips and traps)? ✂
Use it in conjunction with a controlchart.
• Do not always expect the histogram to take the shape of a perfect bell curve. • Ask the help of a statistical expert if you have problems.
Content owner,
Date: 07/12/09 , ISO No
6
vision,
What could be done next?
✂
Use the histogram to monitor the variability of a process.
• Histograms can help eliminate problems if a process is not under control.
Content owner,
Date: 07/12/09 , ISO No
7
Objective To understand histogram
Content owner,
Date: 07/12/09 , ISO No
1
vision,
Why would you like to use this tool (deliverables)? • To display and understand how a set of data points are distributed. • To illustrate the variability in a process.
Content owner,
Date: 07/12/09 , ISO No
2
vision,
When would you use this tool (context)? • When you want to understand if a process is under control. • When analysing a process. • When you want to validate process changes. • When monitoring a process on a continuous basis.
Content owner,
Date: 07/12/09 , ISO No
3
vision,
How to use this tool (steps)? 1 Collect the data – measurements of the variable you arewishing to present in the form of a histogram. 2 Define a range for the histogram – upper and lower limits that include all of the data points. 3 Divide the range into a number of equal intervals. Use 5 to 7 intervals if less than 50 data points have been collected; 10 to 20 intervals for more than 250 data points. 4 Count the number of data points (occurrences) in each interval and construct the histogram – see below. 5 Write the Number (N) of data points collected on the histogram. Content owner,
Date: 07/12/09 , ISO No
4
vision,
Content owner,
Date: 07/12/09 , ISO No
5
vision,
How to make the best use of the tool (tips and traps)? ✂
Use it in conjunction with a controlchart.
• Do not always expect the histogram to take the shape of a perfect bell curve. • Ask the help of a statistical expert if you have problems.
Content owner,
Date: 07/12/09 , ISO No
6
vision,
What could be done next?
✂
Use the histogram to monitor the variability of a process.
• Histograms can help eliminate problems if a process is not under control.
Content owner,
Date: 07/12/09 , ISO No
7
Related Documents
2 Histogram
July 2020 17
Distribution Histogram
May 2020 19
Histogram A
June 2020 24
Intensity Histogram
June 2020 29
Histogram A
November 2019 21