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Consultants scope


The consultants’ scope is entirely different from delivery of projects by conventional construction. For Modular construction, the majority of design development and construction documentation is carried out by the Builder/Modular fabricator team. In most ways it is similar to a Design and Construct method of procurement.


Often the developer engages consultants on a traditional basis and this leads to duplication of scope, extra expenses in fees and additional time in re-documenting the project by the modular fabricator.


To mitigate this risk, each consultant’s tasks and responsibilities should be delineated and demarcated to reflect the modular design process. The developer’s consultants should prepare the conceptual drawings (with advice from a modular design advisor) and detail performance brief and then be retained to check the Builders/Modular fabricator’s design and shopdrawings. It is useful to prepare an outline Drawing Register to determine the extent of each party’s work.

Quality Control


The developer should make provision to engage appropriate consultants to check the quality of the modular fabrication. Establish inspection test points (ITP’s) and conduct periodic checks on the quality of the finish and adherence to the design brief and drawings. Appropriate qualified inspectors should be engaged to check


  1. -structural compliance and shop drawings

  2. -rust treatment

  3. -fire safety and compliance

  4. -acoustic requirements and compliance

  5. -HVAC system and shop drawings

  6. -architectural shop drawings


Cracking and movement will occur during transport and installation. The details and choice of materials are critical to reduce onsite remedial works.


These are just a few of the numerous issues that a Developer should consider when adopting modular construction.


Overall, the benefit to Developers is a reduction in time and the financial benefit associated with that. These benefits will be negated if


  1. 1.the Building Contract does not protect the Developer and risk exposure is not contained

  2. 2.there is inadequate due diligence in the selection of the modular fabricator

  3. 3.the lead consultant lacks experience in modular design and construction

  4. 4.there is duplication between the design consultant and Main Contractor’s scope leading to additional time for re-documenting the project

  5. 5.there is inadequate supervision of the fabrication


If the right approach is taken , the right team with experience is appointed and the project is managed, designed and supervised well, then the developer should benefit from higher quality and lower cost than conventional construction.

Prefab Design Scope

Volumetric Modular Construction is being proposed in Singapore as a method of construction to increase productivity on site and reduce the demand of labour.