Used for determining water quality problems. Basically a simple decision tree leading to a recommendation for action. DSS to help ranchers make decisions about culling cows. Explains model and parameters and provides a simple graphical output. Also allows you to understand the cost of making alternative decisions.
Explanation is here on the Web.
The Excel model is clear and simple and interactive. Just fill in the form and get program to assess it for graduate admissions to an imaginary university. Can draw parallels with use in the HR function for recruitment. Not very interactive, so more a demonstration of possible application. No bells and whistles, but it does work.