| Version | Description |
|---|---|
| 1.0 | The first functional version online. (February 1998) |
| 1.1 | A new Servlet-based file server installed to improve the stability of the server. Balanced scale introduced in AHP. A bug in the exponential value function fixed. (August 1999) |
| 1.2 | Show results as text -function added. Group model help files added. (January 2002) |
| 1.21 | Import ratings as text -function added (April 2003) |
| 1.22 | The drawing time of AWT components in Java 2 improved (September 2003) |