With the latest update of my AHP online software it is now possible to save judgments (pairwise comparisons) without completing the whole hierarchy evaluation. There are two scenarios, where this could be useful:
- You have a complex hierarchy with many nodes to be evaluated. Now participants can start a partial evaluation, save the judgments and complete the remaining nodes at a later time.
- As a participant you are only expert for a subset of nodes in the decision hierarchy. As a chair you can now ask participants to give their inputs for a few nodes of their expertise only.
Pairwise comparison input is started as usually: either using the link provided on the project session page, or using the link AHP Group Session on the AHP-OS main entry page. After providong session code and name, in case the participant hasn’t given any input, a message Ok. Group has x participants. Click “Go” to continue will be displayed. Nodes without judgment show the AHP button with red outline.
Continue reading AHP-OS Hierarchy Evaluation with Partial Inputs from Participants
The latest update of AHP-OS comprises of some minor changes to make the program flow easier to understand for participants w/o background in AHP.
- The group session input screen does no longer show the headline to login or register, as for participants there is no need to be registered.
- The text introduction was shortened to two and a half line of text.
- Menu buttons intended to be clicked are highlighted.
Continue reading AHP-OS Update Version 2017-08-31
It is now possible, to analyse the weight uncertainties in your AHP-OS projects. When you view the results (View Result from the Project Administration Menu), you see the drop-down list for different AHP scales and a tick box var is shown.
Tick var and click on Refresh. All priority vectors of your project will display the weight uncertainties with (+) and (-).
Continue reading Weight Uncertainties in AHP-OS
Concepts, Methods and Tools to manage Business Performance
Dear Friends, dear Visitors,
over the last four months I put in a lot of effort to improve the AHP-OS online tool. With several releases a simplified menu structure and new features were introduced.
- Delete individual participant’s inputs from an existing project.
- Update a project hierarchy or project description, as long as there is no input.
- Evaluate your AHP projects using different AHP judgment scales.
- Analyse weight uncertainties based on small randomised variations of input judgments.
The last two features are based on my recent study about the comparisons of different AHP scales. Up to date there was no recommendation, what scales to use, and I found a new approach to analyse and compare the scales based on simple analytic functions. This study is submitted for publication, and I hope it will not take too long, until it is available. You can find some more information already in my posting here.
The feature of analysing weight uncertainties is an innovative way of doing sensitivity analysis: all judgments are randomly varied by ±0.5 on the judgment scale, and for each variation the maximum and minimum out coming priorities are captured. I use 1000 variations, enough to get a relatively stable margin of errors for each weight. It gives you information, how “precise” a weight or ranking is in your specific project.
Again, a big Thank You to all donors! Please note that the website is a non-commercial website for educational purposes. Your donation is used to cover running costs like web hosting, antispam services etc. PLEASE, help to support this website with a small donation. I spend a lot of time, sharing my knowledge for free. Thank you in advance!
For now, please enjoy your visit on the site and feel free to leave a comment – it is always appreciated.
Klaus D. Goepel,
Singapore, June 2017
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About the author
The original AHP uses ratio scales. To derive priorities, verbal statements (comparisons) are converted into integers from 1 to 9. This “fundamental AHP scale” has been discussed, as there is no thoretical reason to be restricted to these numbers and verbal gradations. In the past several other numerical scales have been proposed ,. AHP-OS now supports ten different scales:
- Standard AHP linear scale
- Logarithmic scale
- Root square scale
- Inverse linear scale
- Balanced scale
- Balanced-n scale
- Adaptive-bal scale
- Adaptive scale
- Power scale
- Geometric scale
Fig. 1 Mapping of the 1 to 9 input values to the elements of the decision matrix.
Continue reading AHP Judgment Scales
In the project menu of the latest AHP-OS version (2017-05-25), I added a button to edit saved projects. As long as there are no participants’ inputs (completed pairwise comparisons), any saved project’s hierarchy, alternatives or description can be modified.
Open a project from your project list, and click on Edit Project. The project hierarchy page will open with a message on top , indicating that you are modifying an existong project. You can now change the hierarchy, for example add criteria or alternatives. A click on Save/Update in the Hierarchy Input Menu
will overwrite the data of the original project under the same session code. You will see it in a message . Before you click on Go to save, you can also update the project short description:
Continue reading AHP-OS – Editing saved projects
Based on feedback from users, I just released a major update of BPMSG’s AHP online software AHP-OS with simplified menu structure and additional functionality. Starting the program as registered and logged-in user, the project session table is displayed, showing your projects.
You can open one of your projects, either using a click on the session code in the project table, or selecting the session code from the session administration menu:
This will bring you to the project summary page, showing
Continue reading AHP-OS New Release with simplified project administration
I received some feedback about session timeout and expired session errors. I have now extended the session timeout to 45 min. After 45 minutes of inactivity (no refresh of html pages, click on menu botton, etc.) the session expires and session data are lost. Kindly feedback, if you still face a problem.
AHP-OS can handle multibyte characters (Chinese, Korean, Japanese etc.) Unfortunately, the bar chart of priorities on the group result page cannot handle these characters; the annotation of the axis will not be readable. I am working on a solution.
When doing a pairwise comparison – leaving all comparisons at the default value of 1 (equal importance) – criteria will get equal priorities. I implemented a confirmation message box: Are you sure to leave all comparisons at equal importance? This was done in order to avoid unintential submission of the default values.
Thanks to the feedback of a user from Iran, I found out that AHP-OS is working with RTL fonts like Farsi. It is important to add the semicolon to the right end of a node definition, and use latin punctuation marks, for example:
کاربری: مسکونی , تجاری , اداری ;
A simple decision hierarchy example looks like here:
Unfortunately, I am not able to check for a hierarchy with more than one level. If anyone could provide a 2 level hierarchy, I would appreciate. Arabic fonts should work too; kindly contact me, if you have an example.
AHP-OS allows for downloading your project data as a comma separated value text file. The following menus include a csv download key:
- Hierarchy Input Menu – download the AHP hierarchy
- Group Result Menu – download resulting priorities and consolidated (aggregated) decision matrix
- Project Data Menu – download decision matrices for all individual participants
Depending on your regional settings of your PC, for each download you can select the decimal point or decimal comma as decimal separator.
Text encoding of the CVS file is UTF-8. If you are using country specific characters and Windows Excel, you can convert from UTF-8 to ANSI. Open the CSV file with notepad, and save as a new file with Encoding set to ANSI.