JAMES II is a general and open framework based on the Plugn simulate concept, which enables developers to integrate their modeling and simulation methodological ideas into, and to create their applications upon an existing framework. This concept together with currently more than 400 plug-ins, and an explicit representation and storage of experiments ease developing modeling and simulation methods and contribute to a systematic experimental evaluation of methods. Modelers benefit from the flexibility that the framework provides with respect to modeling, simulation, and analysis methods, supporting effective and efficient simulation studies, and the well tested methods add to the credibility of the results achieved.
