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A factory project can take three to five years from planning through ramp-up, but that is an indicative range—not a universal construction schedule. Deloitte’s greenfield estimates separate planning, execution, startup and ramp-up; the actual timeline depends on the site, jurisdiction, production process, utility readiness, equipment procurement and operational qualification. Construction is only one part of the path to stable production.
The useful way to plan is as a sequence of linked decisions and work packages. Some can overlap, while others—such as confirming the process before finalizing the facility design—depend on earlier work. A project-specific schedule should track the milestones that determine when the plant can be built, commissioned and brought to its intended output.
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How long does factory construction take?
Deloitte gives indicative ranges of 6–24 months for planning, 12–36 months for execution, 6–12 months for startup and 6–24 months for ramp-up. It summarizes the journey to bring a greenfield factory online as three to five years. These figures are broad estimates, not guaranteed durations or a universal benchmark: stages can overlap, and the consulted page does not identify a common project sample or promise that every factory follows those ranges.
The terms matter. Planning establishes the business case, production requirements, site and project approach. Execution covers design, procurement, construction and installation. Startup moves the completed facility through inspections, commissioning and trial operation. Ramp-up increases output toward stable operations. A building’s practical completion date is therefore not the same as the date it is ready to produce saleable output at its planned rate.
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Use the ranges to frame early discussions, then replace them with a schedule based on the intended location, facility scale, process and environmental profile, utility demand, land status, target output date and equipment procurement assumptions. The United Nations Industrial Development Organization (UNIDO) emphasizes coordinating construction with equipment delivery and installation, staffing, training, supplies, testing and commissioning rather than applying one generic duration.
What determines the factory project’s critical path?
The critical path is the chain of tasks that controls the earliest feasible completion date. For a factory, it can be shaped by decisions made well before construction begins: whether the proposed use is allowed at the site, how long utility connections will take, what the process requires, when specialist equipment can arrive and what approvals apply.
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Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →- Site and land readiness: ownership or purchase status, land-use restrictions, environmental or physical constraints, and any required site-development permissions.
- Utilities and access: whether electricity, water and other required infrastructure can meet the factory’s needs on the schedule assumed, plus transportation and logistics access.
- Process and facility design: the production technology, equipment, capacity, layout and flows that the building and its systems must support.
- Approvals and inspections: jurisdiction-specific submissions and reviews, whose scope and timing depend on the facility and location.
- Equipment procurement: supplier selection, custom or imported equipment, delivery dates, installation requirements and, where relevant, customs.
- Operational readiness: recruitment, training, production inputs, testing, trial production and any applicable qualification work.
These are not independent checklist items. For example, a site may appear attractive but prove unsuitable for the intended use or lack utilities on the needed timetable. A late change to production capacity or equipment can also require design revisions and affect procurement, installation and commissioning. The schedule should show the dependencies, owners and decision dates—not just a target date for construction completion.
What are the stages from site selection to production?
Plan the factory as eight connected stages. Some work can proceed in parallel—for example, equipment planning and site preparation—but only when their requirements and interfaces are clear enough to avoid costly redesign or delays.
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- Define the business and production basis. Establish what the factory will make, the intended production volume and capacity, the process technology, the equipment needs, the investment case and how the site fits the wider production network. Keep those requirements tied to the facility brief. JETRO advises clarifying factory scale, projected production volume, production capability, technologies and equipment before design and contractor selection.
- Screen locations and complete due diligence. Compare candidate sites for legal suitability, environmental constraints, land conditions, transport, workforce and infrastructure. Confirm whether the proposed factory use is permitted and whether required utilities can be supplied when needed. JETRO recommends preliminary consultation with authorities about relevant laws and advises factoring permit timing and utility start dates into milestones. These checks should inform the site decision, not be deferred until after purchase.
- Build the project plan and choose a delivery route. Estimate land, construction and equipment investment, create an integrated schedule and determine how design and construction will be contracted. With separate design and construction contracts, the owner may have greater transparency and control over specifications, but must manage more coordination. A design-build arrangement may reduce the owner’s coordination burden and can shorten construction, but it changes how design responsibility and interfaces are managed. Compare options against schedule, scope control, procurement rules, coordination responsibility and the owner’s capacity; neither route is categorically faster or better for every project.
- Complete basic and detailed design. Basic design translates planned capacity and manufacturing processes into the building structure, equipment and layout, employee flows and equipment specifications. Detailed design develops the architectural, structural, equipment, electrical and piping documents needed to build and install the plant. It must coordinate safety, constructability, cost, materials and transport flows. A generic building shell is not a substitute for design based on the production process.
- Procure equipment and prepare the site. Align supplier selection, prices, quality, delivery dates, procurement risks and installation requirements with the construction sequence. Custom or imported equipment may have dependencies such as supplier lead time, transport and customs. JETRO recommends comparing equipment on price, quality, delivery time and procurement risk. UNIDO’s implementation sequence places equipment delivery and installation alongside site preparation and civil works, making their schedule coordination essential.
- Construct and install. Track construction against the approved design and project schedule, coordinate contractors and safety requirements, and resolve field conditions without losing sight of equipment installation and utility-readiness milestones. UNIDO describes implementation as including site preparation and civil works as well as equipment erection and installation. The work is not complete for production purposes if the building is finished but essential equipment, systems or connections are not ready.
- Inspect, commission and run trials. Complete applicable inspections and approvals, test equipment and plant systems, commission the facility and conduct trial operations. JETRO’s described sequence includes administrative inspections, initial equipment adjustment and integrated trial operation. UNIDO calls commissioning and startup a technically critical link between construction and operations. These activities verify readiness; they are not simply paperwork at the end of a building contract.
- Qualify and ramp production. Where applicable, qualify products and processes, bring trained staff and production inputs online, and increase output toward stable operations. UNIDO recommends scheduling recruitment and training alongside construction and securing supplies in time for startup. Deloitte separates startup from ramp-up, so “first production” should not be treated as proof that the factory has reached stable, planned output.
Which approvals and permits should be on the schedule?
There is no reliable universal factory permit checklist. Requirements depend on the country, locality, site and facility, including its processes and environmental profile. Identify the relevant authorities early, verify the required sequence for the actual project and include application, review, inspection and approval milestones in the schedule.
For Japan, JETRO’s factory-establishment guidance identifies preliminary checks involving planning, agricultural land, factory location and environmental standards, machinery safety and manufacturing permits. It also describes submissions associated with detailed design and construction, including building confirmation and fire, electricity, machinery-installation, construction-work-plan and noise notifications. Those examples are Japan-specific; they do not establish what a factory elsewhere must obtain.
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Invest Korea’s 2025 guide illustrates a different, Korea-specific path that can include factory establishment approval, land purchase, site-development permission, building permits and use approval, environmental review and factory registration. Depending on site conditions, permissions may also be triggered by farmland, mountainous districts, rivers, public water, roads or environmental impact. These examples show why site selection and permitting belong in the same early planning conversation, not why another country should follow Korea’s process.
How should the delivery approach and site be compared?
Compare options against the project’s constraints rather than assuming that one site or contract model is automatically best. JETRO’s guidance supports weighing separate design and construction contracts against design-build, while JETRO and Invest Korea illustrate why site conditions and local rules can change the work required.
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| Decision | Compare | Schedule question |
|---|---|---|
| Candidate site | Land-use permission, environmental and other regulatory constraints, utility capacity and connection timing, access and logistics, workforce and expansion needs | Can the intended use and required infrastructure be available in time for design, construction and startup? |
| Separate design and construction contracts | Specification control, procurement transparency, owner coordination capacity and responsibility for interfaces | Does the owner have the resources to coordinate designers, contractors and equipment suppliers? |
| Design-build | Coordination burden, design responsibility, scope control, procurement requirements and interface management | Can integrated delivery reduce coordination effort without sacrificing the controls the project needs? |
For either decision, test the assumptions behind the dates. A site comparison should account for the timing of permissions and connections, not only purchase readiness. A delivery comparison should account for who resolves conflicts between building design, process equipment and utility systems. Procurement rules or owner requirements can also affect which contracting route is available.
How can the schedule show progress without confusing milestones?
Use separate, explicitly defined milestones for construction completion, inspection and approval, commissioning, trial operation, first production and stable planned output. That makes it possible to see whether a delay is in the building work, equipment installation, readiness checks or ramp-up—and prevents “complete” from meaning different things to different teams.
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Build the integrated schedule around work-package dependencies. It should connect design decisions to procurement specifications; supplier delivery dates to site and installation readiness; construction to utility connections; and commissioning to trained staff, production inputs and required approvals. UNIDO’s industrial feasibility manual emphasizes a project-specific schedule that coordinates these activities, including testing, trial production and commissioning.
Where activities can overlap, show the assumptions that make parallel work possible. Site preparation may be planned while equipment procurement proceeds, for example, but installation dates still depend on the relevant equipment arriving and the work area being ready. If a process or equipment specification is not settled, treat the affected date as conditional rather than presenting it as firm.
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Assign an accountable owner to each major dependency and track decisions as well as physical progress. A useful milestone is specific enough to verify—for example, utility connection available for commissioning—rather than a vague label such as “infrastructure underway.” Include approval and inspection steps, supplier delivery and installation, recruitment and training, and the availability of production inputs. This makes the handoff from construction to operations visible in the same plan.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What commonly causes a factory timeline to slip?
Most schedule risk comes from unresolved interfaces or assumptions that were treated as settled too early. The timeline should make those risks visible while there is still time to change the plan.
- Choosing land before checking use and constraints: verify land-use suitability, site conditions and likely approvals before fixing the location.
- Assuming utilities will be ready when construction ends: confirm capacity and connection timing with the relevant providers and authorities, then schedule the milestones explicitly.
- Designing the building before the process is clear: define capacity, technology, layout and equipment needs early enough to inform basic and detailed design.
- Treating equipment as a later purchase: align supplier choice, delivery and installation needs with civil works and the overall construction sequence.
- Leaving local approvals until late: consult local authorities early and identify requirements for the actual site and facility; examples from Japan or Korea cannot substitute for local confirmation elsewhere.
- Ending the schedule at building completion: include inspections, system testing, commissioning, trial operations and any applicable qualification and ramp-up milestones.
- Scheduling workforce and supplies only after construction: coordinate recruitment, training and production inputs so they are available for startup.
When a date moves, update the dependencies rather than simply adding time to the end of the plan. A change to a site permission, utility date or equipment delivery can affect several downstream milestones. Reassess the sequence, identify which activities can still run in parallel and make clear which production targets have consequently changed.
Frequently Asked Questions
What information should I gather before asking for a factory timeline?
Prepare the country and locality, facility scale, products and process, environmental profile, utility demand, land status, target output date and assumptions for equipment procurement. Those details allow a project team to build a schedule around actual dependencies rather than a broad greenfield estimate.
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Does a completed factory building mean production can start immediately?
Not necessarily. Equipment installation, utility readiness, inspections, commissioning, integrated trials, trained staff and production inputs can remain outstanding after the building work is complete.
Can factory design and equipment procurement happen at the same time?
They can overlap when requirements and interfaces are sufficiently defined, but procurement dates and installation needs must be coordinated with the design and construction sequence. Unsettled equipment specifications can make a parallel schedule conditional.
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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsWhy do factory timelines give a separate ramp-up period?
Startup and ramp-up describe different outcomes: startup is the transition into operating the facility, while ramp-up is the increase toward stable output. The time needed to reach that output depends on the project and should be planned as its own milestone.
