David Elizandro & Hamdy Taha 
Performance Evaluation of Industrial Systems [EPUB ebook] 
Discrete Event Simulation in Using Excel/VBA, Second Edition

Basic approaches to discrete simulation have been process simulation languages (e.g., GPSS) and event-scheduling type (e.g., SIMSCRIPT). The trade-offs are that event-scheduling languages offer more modeling flexibility and process-oriented languages are more intuitive to the user. With these considerations in mind, authors David Elizandro and Hamd