Simulation is the use of virtual computer models to understand and predict the performance of a system without needing to physically build and test the design. This enables much deeper insight into the system prior to manufacture, which in turn enables the engineer to understand and optimize the design. Testing encompasses the broad area of actually measuring real data on existing systems. This provides the engineer with a baseline insight into the existing performance of a system, helping to understand its strengths and weaknesses. Mr. Henk Viljoen (Managing Director)