Guide to Using the RIBA Plan of Work 2013 - Other - Page 83
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• The structural and mechanical engineers work on their models, with the lead
designer providing comments, to ensure that the concept being presented is
robust.
• The iterative design process continues until all of the models are coordinated
and cost-checked to confirm that the project is on budget.
• The detail of each designer’s model progresses until it is sufficiently developed
for use by specialist contractors to prepare their design models.
• The specialist contractors develop their models, which are checked by the lead
designer, who also ensures that they integrate with the coordinated design.
• All design models are signed off and off-site manufacturing and onsite
construction commence and continue until completion.
• The client or a specialist facilities management company utilises the models for
the day-to-day maintenance and running of the building.
Early contractor involvement may result in a more complex interface and overlap
of designers’ BIM files and those prepared by specialist contractors. This scenario
is based on BIM files being transferred between parties and also acting as the
contractual information. The accuracy of the information in these files is therefore
of paramount importance and the level of detail in each model needs to be
appropriate for its purpose. Where the design baton is being handed over from
designer to specialist subcontractor, the level of detail in the designer’s model must
be sufficient for the specialist to progress their proposals.
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Project Execution Plan
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Protocols determining the level of detail for BIM models therefore become essential
tools for use on future projects.
A Project Execution Plan is a useful document on any project. In Chapter 3 the
contents of this document were considered, and Assembling a Collaborative
Project Team provides a further layer of information. In relation to BIM, reference
is frequently made to a BIM Execution Plan or a BIM manual. The RIBA Plan of
Work 2013 suggests that all of these documents are included or referenced in the
Project Execution Plan. A number of aspects of the Project Execution Plan are of
particular importance on a BIM project, as detailed below.
Technology Strategy
Agreement of the Technology Strategy on a project is an essential first step
because different parties involved in a project team will inevitably use different
software packages. Despite a move towards interchangeable data formats (IFC),
outputting data from one software format into another is not always possible
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