A Process, in the world of industry, is a regular sequence of operations for making a product, starting from the suitable raw materials. In the Chemical Industry, where the core business of GST is concentrated, these operations may include: chemical reactions, distillation, absorption, filtration, solvent extraction, heat exchange, etc. Process Design can be defined as the discipline whereby a know-how is translated into a set of documents suitable to allow the speedy and smooth implementation of execution planning activities.