Modelling and Operating Stage

In simulation mode, the performance of the process can be followed. Discrepancies between the model and the process may reveal instrumentation malfunction, problems of maintenance etc. Verified flow-sheet models can be used to 

In practice, models are often tailor-made and their use requires expertise. Budding interfaces, which take into account the special demands arising from man-computer interaction, can greatly expand the use of the models. 

Mode Input models data Computed (exit) models data 

Simulation values of input process variables values of process parameters values of non-process parameters values for exit process variables 

---