Early contractor involvement, managing contractors and construction management explained (Project Delivery, Procurement and Governance) | READOS

Most owners know two ways to deliver a building or plant project. In the traditional model, the owner completes the design and then tenders it to a contractor who builds it. In design and build, the owner describes what it needs and a contractor takes responsibility for both design and construction. Both models aim to transfer risk to a contractor at a defined price, and both work well when the scope is clear and the market is competitive.

Some projects do not fit either model comfortably. The design is still evolving, the program is tight, the site is an operating facility, the risks are hard to price or the owner wants more influence over trade selection and cost than a lump-sum contract allows. For these projects, a family of models keeps the owner closer to the work: early contractor involvement (often run as a two-stage process), managing contractor arrangements and construction management. They can deliver faster, more buildable and better-informed projects. They also shift more risk and more management burden back to the owner, which is easy to underestimate.

This article explains, in general terms, how these models work, who carries which risks, when they suit a project and what governance and capability they require. It is general information. Terminology varies between organisations and contracts, so always look at what a particular contract actually allocates rather than relying on the label.

A spectrum of control and risk

Delivery models sit on a spectrum. At one end, the owner hands over as much risk as possible for a fixed price and steps back. At the other, the owner stays closely involved and carries more of the cost and interface risk in exchange for control, speed or flexibility.

Model	Who designs	Who contracts with trades	Typical pricing	Owner’s risk and involvement
Construct only	Owner’s consultants	Head contractor	Lump sum	Design risk with owner; construction risk with contractor
Design and build	Contractor, from owner’s brief	Head contractor	Lump sum	Lower involvement; owner controls through the brief
Early contractor involvement (two-stage)	Owner’s consultants with contractor input, or contractor	Head contractor in stage 2	Fee for stage 1; negotiated price for stage 2	Moderate; owner shapes the design with contractor advice
Managing contractor	Often coordinated by the managing contractor	Managing contractor, usually by competitive trade packages	Fee plus reimbursable trade costs, sometimes with a ceiling	Higher; owner carries much of the cost risk and oversees closely
Construction management	Owner’s consultants	Owner directly, with the construction manager as agent	Fee to the construction manager; trade contracts priced individually	Highest; owner holds every trade contract and the interface risk

The design first or design and build article covers the choice between the first two models in detail. This article focuses on the others.

Early contractor involvement

Early contractor involvement (ECI) brings a contractor into the project before the design is complete, so that construction knowledge shapes the design, the program and the risk allocation. It is commonly run as a two-stage process.

Stage 1 is a services engagement. The contractor is selected, usually through a competitive process focused on capability, approach and commercial terms such as fees, margins and key rates. It then works alongside the owner and designers on:

buildability and constructability reviews;
staging, sequencing and logistics planning, particularly important on operating sites;
identifying and pricing risks;
market testing of key trade packages;
developing the program; and
preparing a price for stage 2.

Stage 2 is the delivery contract. If the owner accepts the contractor’s stage 2 offer, the contractor builds the project, often under a lump sum or target cost arrangement. If the owner does not accept it, it can take the developed design to the market, which is often described as an off-ramp.

What ECI does well

ECI is valuable where the cost of design mistakes is high and the contractor’s practical knowledge can prevent them: complex refurbishments, operating plants, constrained sites, staged shutdowns and projects with unusual risks. It improves the quality of the design, reduces surprises during construction and allows early procurement of long-lead items.

The commercial challenge

The weakness of ECI is the loss of price competition in stage 2. Once the contractor has spent months on the project, the owner may be reluctant to switch, and the contractor knows it. Owners manage this through:

competing the stage 1 selection on fees, margins and rates that will apply to stage 2;
requiring open-book pricing in stage 2, with trade packages competitively tendered;
obtaining an independent estimate to benchmark the stage 2 offer;
preserving a credible off-ramp, including ownership of the design and documentation developed in stage 1; and
agreeing in advance how the stage 2 price will be built up.

Managing contractor

In a managing contractor arrangement, as the term is often used in Australia, the owner engages a contractor early to manage the delivery of the project, frequently including design coordination, and to procure and manage the trade contractors. The managing contractor typically contracts with the trades itself, usually after competitive tendering of each package, and is paid a management fee plus the reimbursable cost of the trade packages and its own site costs. Some arrangements include a guaranteed maximum price (GMP) or target cost once the design is sufficiently developed.

The model allows work to start before the design is complete, because trade packages can be designed and let in sequence, which can compress the overall program. It also gives the owner visibility of trade prices and some influence over trade selection.

The risks shift accordingly. Because the trade costs are largely reimbursable, the owner bears more of the cost risk than under a lump sum. The quality of the managing contractor’s procurement, cost control and coordination largely determines the outcome. Owners therefore need strong rights to audit costs, approve trade package procurement and see accurate forecasts of the cost to complete.

Guaranteed maximum price

A guaranteed maximum price sets a ceiling on what the owner will pay for a defined scope, with savings below the ceiling often shared. It sounds like a lump sum with an upside, but it depends entirely on the scope it relates to. Changes to scope, design development beyond what was assumed and owner-caused delays usually adjust the GMP. A GMP set on an immature design is likely to move. The fixed price or not article explains how target cost and other pricing methods share risk.

Construction management

Under construction management, the owner contracts directly with each trade contractor, while a construction manager acts as the owner’s agent to plan, procure, coordinate and supervise the work for a fee. The construction manager does not usually carry the trade contract risk.

This model offers maximum transparency and flexibility. Packages can be let progressively, design can continue alongside construction and the owner deals directly with each trade. It suits experienced owners with complex, fast-track projects who want control and are willing to carry the consequences.

The consequences are significant. The owner holds every trade contract, so it carries the risk of trade defaults, interfaces between packages, coordination failures and delay claims between trades. If a trade’s late work delays another trade, the owner may face claims from both. Owners without experienced project teams can find construction management expensive and stressful.

Choosing a model

No model is best in general. The right choice depends on the project and the owner. Useful questions include:

How mature is the design? Immature design favours models that keep the owner involved; mature design favours price certainty.
How tight is the program? Fast-track projects may benefit from progressive trade procurement.
How complex are the risks? Risks that are hard to price may be better managed jointly than transferred at a premium.
How capable is the owner? Models that keep the owner close demand experienced people to manage cost, procurement, design and interfaces.
How does the market feel? In a busy market, contractors may price lump-sum risk heavily or decline to bid.
How important is cost certainty at approval? Boards and lenders sometimes require a fixed price before committing, which favours traditional or design and build models, or a two-stage process that ends in a lump sum.

Governance these models require

Models that keep the owner close need stronger owner governance. Key elements include:

Open-book cost reporting, with audit rights over the contractor’s costs and trade package prices.
Clear fee structures, ideally a fixed or capped management fee rather than a percentage of cost, which can reward cost growth.
Trade procurement controls, including approval of tender lists, conflict-of-interest management and fair evaluation of trade packages.
Cost-to-complete forecasting, updated regularly, with variance explanations.
Change control, so that design development is distinguished from scope change.
Interface management, especially under construction management, where the owner owns every interface.
Decision rights, so that design, cost and program decisions are made promptly by people with authority.

The alliance contracting article describes a further step along the spectrum, in which owner and contractors share decisions and financial outcomes as one team.

A worked example

This is an illustrative example. The project, figures and events are hypothetical.

A food manufacturer plans a $4.5 million expansion of its packing hall, which must be built while the existing hall keeps operating. The design is about 30% complete, and the work has to fit around two planned shutdowns. A lump-sum tender at this stage would invite heavy risk pricing, and the manufacturer worries that a contractor unfamiliar with the site would plan the staging badly.

It chooses a two-stage ECI process. Three contractors compete for stage 1 on their approach to staging, their team, a stage 1 fee and the margin and preliminaries rates they will apply in stage 2. The selected contractor’s stage 1 fee is $60,000. Over four months, it works with the designers to resequence the work into five stages, identifies that the existing roof structure needs strengthening, and market-tests the steel, refrigeration and electrical packages.

Its stage 2 lump-sum offer is $4.82 million. The manufacturer’s independent estimator, given the same design and risk register, estimates $4.65 million. The difference is mainly in two trade packages and a risk allowance for the roof work. Using the open-book build-up, the parties agree to re-tender the electrical package, which reduces the price by $70,000, and to remove the contractor’s $60,000 risk allowance for the roof work, carrying that work instead as a provisional sum because its extent will only be known after opening up. The final lump sum, excluding the provisional sum, is $4.82 million less $70,000 less $60,000, or $4.69 million. The manufacturer keeps the off-ramp until signing, and the design produced in stage 1 belongs to it.

The process cost $60,000 and four months, but it produced a buildable staging plan for an operating site, a price the owner could test and a known approach to the largest risk.

How this applies to a small Australian business

Most small businesses will not run a construction management project. But these models still matter:

As owners of mid-sized projects. A plant upgrade, fit-out or building extension of a few hundred thousand to a few million dollars can benefit from early contractor input, even informally, through a paid buildability review before tendering.
As subcontractors. Many trade contractors work under managing contractors or construction managers. Understanding who holds the contract, who can direct changes and who pays matters for every subcontract.
When the owner lacks capability. If the business cannot provide experienced project management, cost control and design coordination, it should be cautious about models that keep it close to the risk.
When time is critical. Progressive procurement and early contractor input can protect a shutdown or a launch date, but they cost management effort.

Common mistakes

Choosing a model by fashion. The model should follow the project’s risks and the owner’s capability.
Losing price tension in stage 2. Without competitive stage 1 rates, open-book pricing and independent estimates, the owner may overpay.
Treating a GMP as a fixed price. It moves with scope and design development.
Percentage fees that reward cost growth. A fee tied to total cost gives the contractor little reason to reduce it.
Underestimating the owner’s role. Construction management in particular demands experienced owner resources.
Weak interface management. Under construction management, gaps between trade packages become the owner’s problem.
Not owning the stage 1 output. Without ownership of the developed design, the off-ramp is not credible.

Questions to ask

How mature is our design, and how certain must the price be when we commit?
What risks are hard to price, and who is best placed to manage them?
Do we have the people to manage cost, procurement, design and interfaces if we stay close to the work?
How will we keep price competition in the delivery stage?
What audit and open-book rights will we have, and who will use them?
How is the contractor’s fee structured, and does it reward the outcomes we want?
Who holds each trade contract, and who carries the interface risk between them?
Do we own the design and documents if we need to take the off-ramp?

Bringing it together

Early contractor involvement, managing contractor and construction management models exist for projects that do not suit a simple transfer of risk at a fixed price. They bring construction knowledge into design, allow faster and more flexible procurement and give owners visibility and control. In exchange, they place more cost and interface risk on the owner and demand stronger governance and more capable owner teams. The right model follows from the project’s design maturity, program, risks and the owner’s own capability, and it succeeds only when the owner manages the commercial safeguards, such as competitive rates, open-book pricing, independent benchmarks, clear fees and a credible off-ramp, as carefully as the design.

Source: KEVOS editorial notes. Examples and figures in this article are illustrations. This article provides general information and does not constitute legal or professional advice.