A process simulation diagram is drawn from the process flow diagram. The chemical
components are specified. The chemical component properties are generally available in a
standard data base. The input streams are specified. Thermodynamic modelling is done.
Series of simulations are run for convergence of a particular variable. Sensitivity analysis
which consists of varying the sampled variables as a function of the manipulated variables is
normally done. The major parts of a cumene production plant are reactor system, separation
system and they are optimized.