On a mega-project, the most expensive problems usually appear at the boundaries: between disciplines, between design packages, and between the consultant's design and the specialist contractors' designs. Managing those interfaces is one of the project manager's most important tasks.
Good practice includes:
• A design responsibility matrix that states who designs every element, from structural connections to façade brackets and MEP supports.
• An interface register that records every boundary between packages, the information each party needs and the date it is needed.
• Coordinated 3D models in which clashes between structure, services and architecture are found and resolved before construction.
• Controlled design release, so each package is issued for construction only when it is coordinated and approved.
• A disciplined RFI process, with site queries answered quickly and recorded.
Merka's article on 3D model coordination between disciplines explains how model-based workflows reduce clashes and rework.
Services are the densest interface on most buildings. Mechanical, electrical, plumbing and fire systems share the same risers and ceiling voids, and Merka's guide to MEP design for Dubai developers covers how they are coordinated.
Interiors form another critical interface on hotels, residences, offices and retail. The interior design sets ceiling heights, lighting positions, joinery, finishes and loads that affect structure and services, so an experienced interior designer in Dubai should be brought into the team early, with ceiling, wall and floor zones agreed before MEP routes and slab set-downs are fixed.
Mixed-use schemes combine several of these interfaces at once. The Downtown Mixed-Use Tower concept, bringing residential, retail and commercial uses into one building, is the kind of project where separate cores, services and fit-out standards for each use must be coordinated from the start.