Lanner’s Witness Release 14 simulation software is one of the more powerful process simulation software products available. This text begins with the fundamentals of process design using Manufacturing Systems Design Decomposition. MSDD is a specific application of Axiomatic Design to the development of manufacturing processes. Witness fundamentals are introduced using a number of case examples which are fully illustrated and built up step-by-step. Finally several more advanced topics are introduced in the final chapter including development of probability distribution functions from empirical data, development of stochastic simulation models, multicycle machines and simulation of the Process Failure Mode Effect Analysis (PFMEA) in simulation models.Chapter 1 – Simulation model project planning Chapter 2 – Introduction to Lanner Witness structure and menus Chapter 3 – Building a first simple model Chapter 4 – SMT electronics manufacturing model Chapter 5 – Conveyors and paths Chapter 6 – Variables and variability Chapter 7 - Advanced PFMEA and simulation, Axiomatic Design of simulation models