Most simulation libraries focus on implementation issues rather than using abstractions from the problem domain. There is a semantic gap between the low-level abstractions they offer, such as process classes, and the problem-oriented abstractions the user wants. Also, most systems don't offer support for hierarchical systems. This makes it difficult to implement reusable submodels and components that can be further refined as the design evolves, which is an essential features for simulating complex systems.

The IKR Simulation Library is a flexible general purpose library for the simulation of complex hierarchical systems. The library is implemented in C++ and JAVA and uses high-level abstractions that are closely related to the problem domain. Therefore, users can easily map their simulation models to actual simulation programs. The library can be easily extended by taking advantage of C++/JAVA language concepts. It uses few basic abstractions and emphasizes a clean software architecture. The library supports hierarchical decomposition of simulation models into submodels and model components. Model components are strictly encapsulated and communicate with each other using a handshake protocol. This offers the ability to highly reuse standardized model components and quickly create or modify a simulation model using a `plug-and-play' approach.

Based on the Summary of Hartmut Kocher's PhD thesis

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