Understandably, clients tend to under-invest in project preparation during
the initiation phase as
they seek to minimise design, development and feasibility study costs. However, because many projects are put to
tender with incomplete documentation and before their cost has been estimated
accurately, tenderers have to add a significant risk premium to their bids. Project costs cannot be accurately
estimated without detailed design and specifications, and high cost bids for a
project allow the later diversion of funds. On the other hand, incomplete
design can lead to estimates below project costs, with consequent claims and
disputes obscuring the eventual recipients of funds. Contractors’ claims for
reimbursement can lead to significant cost increases, and an unscrupulous
contractor will also cheat on materials, compromise on quality, and deliver
below the specification, resulting in poor quality assets with high maintenance
costs.
Therefore, the first reason clients
should invest in the development of some internal PM capabilities is because the
quality of design and documentation before tendering reduces contractor risk
and thus total project cost. Whether these documents are being prepared
internally or externally, this task is one of design management. If the interaction between
designers, consultants and contractors is managed by the client project team, they
take responsibility for the project’s overall design and development at the earliest
stages. Separating the design stage from tendering will also improve
opportunities for consultation.
The
second reason clients should invest in the development of internal capabilities
is because they are, in reality, holding the eventual risk of their projects
when they complete and become operational. The ability to manage that risk with
their own client team on major projects, responsible for the process of project
shaping and front-end definition, is an opportunity to add a great deal of value
for the client. Even when consultants and contractors work to the best of their
abilities, their firms have separate interests from the client.
The key
factor is the extent of the specifications. On some major projects there may be a limit to how
much design can be completed upfront, as this develops over time and the project details are refined and
defined. It is unreasonable to expect a complex project to be fully specified
at tender, and in most cases this would not be possible. It may also be advantageous
to look for innovative ideas or design options, so for these projects an
incremental approach would be followed to allow contractors and suppliers the
opportunity for input during the development of the design.
This also has the advantage of reducing uncertainty from poor tender
documentation, thus lowering risk and cost for tenderers.
The
client PM and project team should be responsible for overseeing the design and
documentation of the project, ensuring the most appropriate construction
options are chosen. Despite the proliferation of contracts used in the building
and construction industry most major projects are delivered using either the
traditional design-bid-build or Design and Build (D&B) and Design and
Construct (D&C) contracts. The trend has been toward D&B and D&C
contracts for major projects, and these account for a larger share of work done
than number of projects. There
is some support for design and construct procurement of buildings and social
infrastructure from school PPPs in Australia and hospital PFIs in the UK. This may be due to the buildability issues found in
complex buildings with many services, like hospitals, or the emphasis on
maintenance costs with schools. However, the problems found
in D&C projects of design changes by the client and conflict
of interest between design team members and the contractor are common.
Nevertheless,
Ed Merrow argues for traditional construction
procurement for the types of projects in his database. This is when consultants
are appointed to manage the design, and a competitive tender is held for one or
more contractors to execute the works on site against a complete design. Using
evidence from the 11,000 private sector resource, industrial and engineering projects
in his database, Merrow believes the best form of project delivery is what he calls
‘mixed’, with engineering design contractors hired on a
reimbursable contract, and construction contractors hired on a separate
fixed price contract. The evidence from the database suggests this is the most
effective form of project organization, and represents traditional procurement
with consultants appointed to do the design, and a competitive tender run for
one or more contractors based on the finished design.
The
approach advocated here combines elements of both the D&C and traditional
procurement strategies. By engaging the PM and project team early, before
detailed design work commences, the integration of design development with
construction options retains the advantage of a D&C contract, as the PM
manages the consultants as they develop the design solutions. However, the loss
of control and the premium that is paid for management of a D&C contract is
avoided.