Begin by defining how the building will be used and what conditions it must accommodate. A classroom, site office, healthcare room and accommodation unit may require different proportions, finishes, insulation, ventilation and access arrangements. Modular construction uses repeatable sections or modules, which can reduce work carried out on site. It can also make late changes more disruptive because one alteration may affect structure, services and adjoining modules. Record occupancy, equipment locations, fire provisions, accessibility needs, operating hours and preferred finishes before approving a layout. This gives the factory and site teams a shared starting point.
The site survey should cover more than the footprint shown on a plan. Ground conditions, levels, drainage, access and the foundation interface all need review. This interface is the designed connection between the prepared base and the transported module, including bearing points, levels and fixing locations. Check road width, turning space, overhead cables, low branches, gates and neighbouring structures. A delivery vehicle may pass the entrance but still fail at a sharp bend. Measuring the route and taking photographs during the survey can prevent an expensive discovery on delivery day, when alternatives are harder to arrange.
Services cross the boundary between the module and the site, so their connections need early coordination. Electrical supply, water, drainage, data, heating and ventilation each require a defined joining point with access for testing and maintenance. A drainage route that appears acceptable on a floor plan may lack the necessary fall once site levels are confirmed. On a hypothetical small office project, an unchecked incoming power route could clash with the foundation layout and delay installation. Keep a coordinated services drawing beside the latest architectural plan, and record every alteration through a controlled revision process.
Design for manufacture and assembly, or DfMA, considers how each component will be produced, protected, lifted and joined before manufacturing begins. Tolerances matter because small differences in several parts can accumulate and make connections difficult. Structural, architectural and services information should therefore be checked together rather than issued as separate assumptions. A practical review can confirm door clearances, lifting points, service penetrations and fixing details before the factory releases work for production. An approval register showing the drawing number, revision and responsible person helps prevent an obsolete plan reaching the workshop.
Transport and lifting need their own programme. Modules may require temporary protection, lifting points and a route assessment covering bridges, gradients, restrictions and delivery timing. The lifting plan should identify equipment, ground bearing requirements, weather limits, exclusion zones and the order of placement. With a hypothetical two-module reception, placing the second unit first could block access needed to connect the first. Cost comparisons should include surveys, foundations, site preparation, transport, lifting, service connections and testing, not just the factory price. Teams can use transportable building systems to frame scope discussions, while checking every assumption and exclusion.
Before approval, agree who checks the base, directs the lift, protects completed finishes and accepts each service connection. Also decide when information is frozen and how changes will be priced, since a late alteration may affect factory work, transport and site preparation at once. Handover should include certificates, operating information, applicable warranties and a record of concealed services, leaving the client with a usable building rather than merely delivered modules. Clear coordinated project planning can also clarify maintenance access and future responsibilities, giving the completed facility a practical operating framework.
