S No. | STAGE | KEY DELIVERABLES | OUTCOME |
1 | Concept & Feasibility | The concept stage defines the project philosophy and intent. It establishes the “what” and “why” of the project — identifying objectives, process routes, plant capacity, and high‑level layouts. Deliverables typically include a concept note or design basis report, which sets the framework for subsequent engineering. | Go/No‑Go decision.This stage ensures alignment between stakeholders on scope, performance targets, and compliance requirements. |
2 | Basic Engineering | Process flow diagram, layout, design basis, budgetary estimate | Define the project at a glance. It is a blue print that turns the vision into actionable engineering. |
3 | Detailed Engineering | Detailed engineering is the systematic translation of basic engineering into construction‑ready deliverables. It involves preparing comprehensive drawings, 3D models, equipment specifications, material take‑offs, and integration plans. | Ensures compliance with statutory codes, safety standards, and constructability requirements, providing the EPC team with precise instructions for execution. |
4 | Procurement | Procurement is the structured acquisition of equipment, materials, and services required for project execution. It covers vendor qualification, tendering, bid evaluation, contract negotiation, expediting, inspection, and logistics. | The objective is to secure compliant supplies at optimal cost and schedule, while ensuring adherence to technical specifications and quality standards. |
5 | Construction | Construction is the physical realization of the project on site, encompassing civil works, structural erection, mechanical installation, electrical and instrumentation works, and commissioning activities. It requires coordination of manpower, machinery, and materials, strict adherence to safety protocols, and continuous monitoring of progress, quality, and cost. | It is the essence of the contract and on completion paves way for the start up and finally successful completion of the project. |
6 | Start up and No-load trials | It is the initial energization and dry operation of plant systems without introducing process loads. Activities include pre‑commissioning checks, flushing, calibration, leak tests, and mechanical run‑ins. The objective is to confirm that equipment is correctly installed, safe, and ready for live operation. | This stage is essentially the “switch‑on and verify” phase before load is given to the installed system. |
7 | Commissioning | Commissioning is the controlled ramp‑up of plant operations under load, progressing from trial runs to stable, continuous production. It involves:Gradual loading of equipment to design throughput.Process tuning of flow rates, temperatures, pressures, and automation loops.Integration checks across mechanical, electrical, and control systems.Stabilization of product quality, recovery rates, and energy consumption.Operator training under live conditions. | Operational readiness |
8 | Performance guarantee establishment | Performance guarantee establishment is the formal validation of contractual commitments through structured testing and measurement. It includes trial runs under defined load conditions, sampling, mass balance audits, and efficiency checks to demonstrate compliance with agreed parameters such as throughput, product quality, recovery, energy consumption, and environmental standards. | Results are documented and certified jointly with the client, providing assurance that the project delivers its intended business value. Any deviations are managed within tolerance bands and liquidated damages clauses, ensuring accountability and risk mitigation. |
9 | Final Acceptance (FAT) | Final Acceptance (FAT) marks the formal conclusion of a project’s execution phase, when the completed facility, system, or equipment is tested, verified, and handed over to the client or end‑user. | All the financial and liability settlements are completed along with returns of Bank Guarantees to the contractor. Only warranty clause of the contract is in vogue till the stipulated period. |
10 | Post‑Completion Review | Lessons learned, cost reconciliation, sustainability audit | Continuous improvement |