EPC contractor services: eight phases from planning to handover
Each phase below has its own page setting out the work we do, the documents you receive at the end of it, and the codes it is built against.
Work sequence
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Planning & Feasibility
Testing whether the project is viable on the land, budget, and schedule available.
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Design & Engineering
Turning the production requirement into buildable drawings, calculations, and specifications.
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Permitting & Compliance
Securing the building approval, environmental documents, and technical clearances the project needs.
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Procurement
Tendering work packages, locking vendors, and ordering long-lead items on time.
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Civil & Structural Works
Preparing the site, placing foundations, and erecting the concrete and steel structure.
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Architecture & Enclosure
Closing the building: roof, walls, facade, floors, industrial doors, and support spaces.
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MEP & Utilities
Installing power, HVAC, plumbing, fire protection, wastewater treatment, and process utilities.
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Commissioning & Handover
Testing every system, closing defects, securing the SLF, and handing over an operational building.
Eight phases, but not eight queues.
The phase numbers show the order of responsibility, not a rigid timeline. Projects that finish on time usually do so because several phases overlap.
| Phase 02 + 03 | Design and permitting run together. The technical package the PBG needs comes out of the same detailed design process. |
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| Phase 04 + 05 | Long-lead orders are locked while earthworks and foundations are still starting, not after the structure is up. |
| Phase 05 + 06 | The envelope starts in areas already under roof, so interior MEP work can begin earlier. |
| Phase 06 + 07 | MEP follows the enclosure sequence, on pipe rack and tray routes already coordinated back in Phase 02. |
Not every client needs all eight phases.
Some already have a design, some only need permitting closed out. We take partial scopes, with the responsibility boundary written into the contract from the start.
Discuss your scope| Phases 01–03 | Design and permitting only. You self-perform construction or tender it separately. |
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| Phases 05–08 | Construction only, where a design already exists. We run a design review first and issue the findings in writing. |
| Phases 01–08 | Full EPC. One contract, one accountable party, from feasibility through to final handover. |
The process is calculated in-house.
For plants whose product comes from reaction, separation, or heat transfer, the EPC scope above starts earlier still: at the process design basis, the material and energy balances, the simulation, and the equipment sizing. It can also be taken as a document package without the construction work, or as an evaluation of a plant already running.
See the process engineering scope| Process Design Basis | The document that fixes what is actually being designed, before any drawing exists. Without it every later calculation stands on an assumption nobody wrote down. |
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| Material & Energy Balances | The calculation that sizes almost everything downstream. A balance that does not close is a finding, not something to be tidied until it appears to. |
| Process Simulation | A steady-state model used to test cases, not to produce numbers that look convincing. The thermodynamic method chosen is reported alongside the result it produced. |
| Separation & Distillation Systems | The part of a process that consumes the most energy and most often decides whether product specification is met. An azeotrope is not solved by adding trays. |
| Process Equipment Sizing | From process conditions to dimensions, materials, and a datasheet that can be tendered. It stays a conceptual design until vendor data arrives. |
| Heat Integration & Energy Efficiency | Recovering heat the process already contains before buying new utility. An opportunity on paper is not yet a feasible installation. |
| Performance Evaluation & Debottlenecking | For plants already running. The work starts from field data we collect ourselves, not from old drawings that may no longer match the plant. |
| Process Safety & Control | A process is judged by how it fails, not only by the purity it reaches. This is the part that makes a design operable by people rather than merely calculable. |
The M&E scope runs through an affiliated company.
Alongside the EPC scope above, PT. The Construction Contractor also offers mechanical and electrical services through PT. The M&E Contractor, an affiliated company under the same management. It can run inside this EPC contract, or as a standalone M&E contract.
See the full M&E scope| Electrical Systems | From the utility connection to the machine terminal, sized from a real load schedule rather than an assumption per square metre. |
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| HVAC & Ventilation | Cooling load is calculated from the production process, not from floor area. An oversized system costs as much as an undersized one. |
| Plumbing & Sanitary | Potable water, process water, and drainage designed for peak demand rather than daily average. |
| Fire Protection | Sprinkler requirements follow the stored commodity and its stack height. The same warehouse with different contents needs a different system. |
| Water & Wastewater Treatment | Effluent quality follows the project’s Environmental Approval. A system that misses it becomes a permitting problem, not merely a technical one. |
| Process Utilities | The utilities that attach directly to production machinery. A capacity error here shows up immediately as a stopped line. |
| ELV & Building Systems | The systems rarely scrutinised at tender, yet used every day by whoever operates the building. |
| Instrumentation & Control | Where the building works meet the production machinery. This is where coordination with the machine vendor matters most. |
Questions we are asked
- How long does it take to build a factory from empty land?
- The schedule is set by foundation type, the complexity of process utilities, and how quickly the local authority issues the PBG, so there is no answer that holds generally. Permitting and design run in parallel so they do not queue behind each other. We build a phase-by-phase schedule in Phase 01, once the site and the production requirement are known, rather than quoting a single number up front.
- What does a factory cost per square metre?
- We do not quote a rate per square metre before seeing the project, because a figure like that is almost always wrong for a specific one. The biggest cost drivers are the foundation type dictated by soil conditions, clear height and structural span, floor specification, electrical and HVAC capacity, wastewater treatment requirements, and how far the office areas are fitted out. An estimate follows a feasibility study and soil investigation, and tightens again once detailed engineering and the bill of quantities are complete.
- Does TCC handle the PBG and SLF?
- Yes. Permitting is Phase 03 of our work sequence, covering the PBG building approval, UKL-UPL or AMDAL environmental documents, traffic impact analysis where required, and other technical clearances. The Certificate of Fitness for Occupancy is closed out in Phase 08 together with statutory safety inspections, so the building is legally operable at handover.
- Which areas does TCC serve?
- We are based in Jakarta and work primarily across Greater Jakarta and the surrounding industrial belt: Bekasi, Cikarang, Karawang, Purwakarta, Subang, Tangerang, and Serang. For projects outside that area we assess viability case by case, based on project scale and local supply chain availability.
- Can TCC take on only part of the sequence?
- Yes. The most common partial scopes are design and permitting only, covering Phases 01 to 03, or construction only, covering Phases 05 to 08 where a design already exists. For construction-only packages we run a design review first and issue the findings in writing before agreeing a price and programme.
Tell us about the project.
Send the outline: location, approximate area, process type, and target production start. We will come back with the questions that need answering before any number means anything.