Process systems engineering is a core subject of chemical engineering. The subject adds umbrella knowledge to the discipline and splits mainly into two main domains, namely
process design and process operations.

Process Design

… covers all aspects involved in the process of realising a plant such as

• small-scale, bench-scale, pilot-scale and live-scale experimentation
• process selection
• process structure selection
• plant structure selection
• ecological and economical analysis
• process engineering
• hazard and operational analysis

Process Operations

… covers all aspects of operating a plant or a set of plants

• hierarchical process control
  • process element control
  • unit control
  • train control
  • plant control
  • supervisory control
  • plant and production scheduling
  • logistics
  • optimisation on all levels

Model-based computational engineering is thereby omnipresent. Models are being constructed for all parts, and all scales. Latter spreading from the atom-level to large-scale storage capacities.