Abstract
Simulations are of vital importance today. As computers have become more and more powerful, we can make even more complex simulations. Simulators have become more modern and more powerful. Simulators usually have some form of representing the model internally. To build a simulation we need to first construct the model. Models can become extremely complex and to help us with that task we need a tool, which we call an editor. The goal of this work is to create an editor for the ION simulator. The first steps we made were to first define the features we wanted for our editor, were make an analysis on the state of the art of the various editors that exist and analyze how they implemented their features. With the features we want and techniques to implement them we started to build the interface, with the help and input of users. We took an iterative approach in the design of the interface, with multiple usability tests during the development. The end result is a tool that supports all the basic functionality of ION, is very extensible and had a good reception by the users.