In the chemical industry the development of new processes and the revi
sion of operating processes are the main tasks of chemical engineering
divisions. After defining the idea of process development and process
revision the fundamentals in dealing with complete chemical processes
like experiment, modelling and full-scale operation if possible will
be explained in this paper. The meaningfulness and the limits of these
elements will be shown and hints are given for available and useful t
ools and instruments. Furthermore evaluating tools as well as siting p
roblems and other practical aspects are considered.