Writing an MEP Design Brief for a New Factory (Template Inside)

An MEP design brief tells the designer what the factory must do, not how to do it: the process utilities by point of use, the growth the plant must carry, the redundancy it needs, the standards and approvals that apply, and the budget basis. Filled in before design starts, it cuts late changes and makes the bids that follow comparable. A template follows.

What is an MEP design brief, and who writes it?

It is the owner's statement of requirements, written before the consultant draws anything. The process engineer supplies what each machine and line needs. The owner supplies the production plan, the site, the budget and the programme. The MEP consultant then converts the brief into a basis of design and checks it for gaps.

It helps to see the brief as an output specification. The Government of India's Manual for Procurement of Works says that design-and-build contracts should specify broad technical requirements and key output parameters, and that over-specification of the design may increase cost. The same logic applies to a private factory: say what must be delivered and to what parameters, and let the designer choose how.

What goes into the brief?

The table is the brief. Copy it into a document, fill every row, and mark any row you cannot answer as "to be confirmed" with the person who will confirm it.

How should growth and redundancy be stated?

State growth as a phase, never as a bare percentage. Write phase 1 output, the ultimate output and the year, and ask the designer to separate what is built now from what is reserved: the transformer plinth, the shaft, the pipe-rack width, spare breaker ways, the plant-room floor. Reserved space is cheap on day one and expensive after the building is occupied. Our note on transformer and substation undersizing shows how a growth assumption left unstated becomes a bottleneck.

State redundancy as a consequence. For each utility, write what stops if it fails and how long that stoppage is tolerable. If a failed chiller stops a line, the designer prices a standby unit. If it only warms an office, the designer does not. The owner makes that decision once, in the brief, with the cost in front of it.

Which standards and approvals should the brief list?

List the ones you know and ask the consultant to complete the list. For a factory, four sets are usual.

• Fire. The National Building Code of India 2016, published by BIS, with Part 4 on fire and life safety, read with the state fire law. Delhi Fire Service, for example, lists the documents it wants for clearance: architectural plans marking the fire control room, pump house, tanks and hydrants, sprinkler design calculations and layouts, smoke-control calculations and layouts. Your state's list will differ; see our Fire NOC guide for Punjab, Haryana and UP.
• Electrical. The CEA safety regulations and the state Electrical Inspector's approval before first energising. A CEA presentation on the 2023 regulations lists the work completion certificate, updated single-line diagram, earthing and site layouts, equipment list, test reports and contractor licences. See CEIG approval for factories.
• Environment. The state pollution control board's consent to establish and consent to operate, which depends on the effluent, emissions and DG sets in the brief. See CTE and CTO.
• Factory licensing. The state's factory plan approval and licence, which is a separate approval from the Fire NOC and CEIG. Ask the consultant what your state's plan approval covers. See factory licence and DISH approval.

How should the budget basis be written?

Give a range, say what it includes, and say what it excludes. Write whether process utilities inside the machine battery limit are in or out, whether the HT supply and DISCOM charges are included, whether land development and external works are separate, and the contingency you hold. Ask the designer to report against it at each phase gate. For an early range to put in the brief, use the MEPF cost calculator and check the electrical side with the factory electrical capacity calculator. These are screening tools, not a budget, and neither replaces the designer's estimate.

What deliverables should you ask for?

Name them in the brief so they are in the fee: load schedules and calculations for each service; single-line diagram and protection philosophy; sprinkler and hydrant hydraulic calculations and smoke-control calculations in the form the fire authority wants; HVAC load and duct and pipe sizing; drawings coordinated across services; specifications; a priced BOQ; and the approval submissions with the designer's responses to queries. Ask also for as-built drawings and a test and commissioning plan at handover.

How Secured Engineers helps

We offer MEP design consultancy and a technical review of an existing brief or design. Design is in-house, and the Fire NOC, CEIG and DISCOM filings are made by our own team, so a brief that lists the approvals gets a designer who has filed them. MEPF and solar can sit under one contract. We work from offices in Noida (Delhi NCR) and Ludhiana, with 535+ projects across 18+ states and 89.77% repeat clients.

If you have a draft brief, send it to us for a design review before you appoint anyone. See our design and approvals service, message us on WhatsApp, call +91 70099 85817, or ask for a free proposal.