The Windchill ESI EAI Windchill Simulation module provides a method to test the EAI software components without the need for a Windchill system. The ESI EAI Windchill Simulation module is a BusinessWorks engine that connects to the JMS queues in the same way that Windchill ESI Services would; it publishes Windchill ESI Response, and Windchill ESI Result Response messages and receives Windchill ESI PostResult messages. The Windchill ESI EAI Windchill Simulation module does not perform any business logic – the information it sends to the EAI software components is simply read from files.