Job Book 9th Edition - Book - Page 218
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Stage 4 > Technical Design: Supplementary Material: 4/SM1
or substitutions by the contractor client. The client might also have a particular
preference for detail design solutions which are familiar, will wish to use materials
or components which are available to suit the programme, and will wish to keep
in line with the estimator’s calculations.
Stage 4, insofar as it might be relevant for an employer client, will probably apply
mainly to the development of the Employer’s Requirements. Once the Building
Contract has been let, any changes in these are likely to be costly and weighted
heavily in the contractor’s favour.
6. Avoidance of conflict
Once the contract is under way, should any conflict between the Employer’s
Requirements and the Contractor’s Proposals emerge, then depending on the
wording of the Building Contract, the latter is likely to take precedence. Careful
scrutiny at Stage 4 is therefore advisable, whether the architect is acting for the
employer client or the contractor client.
Design information flow: management procurement
Management procurement is likely to be particularly suitable where the project
is fairly large or complex, where there is need for early completion, or where
the requirements of the client might change or perhaps only be formalised
in detail during work on site. Design is still in the hands of the design team.
The management contractor is appointed early enough to advise the team on
buildability but carries no responsibility for the design. As project lead or lead
designer, responsibility for coordinating and integrating information into the
overall design rests with the architect, although considerable design input will
normally come from the specialist works contractors.
1.Origination
Design information can originate from:
• the architect
• design team members
• specialist works contractors.
2. Detail design work
Two general lines of the design will be shown in the project drawings and project
specification produced by the design team. Some Stage 4 design is an essential
precursor to information issued when inviting tenders for works packages.
Further detail design work will arise when the works contractors are appointed.
Each discrete work package must be placed in the context of the overall design.
The information flow can produce management problems if not effectively
