• Process design refinement based on Basic Engineering deliverables

• Development of process simulation cases and operating scenarios

• Preliminary equipment sizing and mechanical data sheet preparation

• Process specification for critical equipment (columns, compressors, heat exchangers, etc.)

• Piping and line sizing criteria, preliminary line list, and tie-in definition

• Process data for instrument and control design

• Utility summary and preliminary utility load estimation

• Development of plot plan and process layout input

• Preliminary safety studies (HAZOP, flare, and overpressure protection review)

• Identification of process bottlenecks and optimization opportunities

• CAPEX and OPEX estimation for process units

• Preparation of process design package (PDP) for EPC bidding and procurement