Procurement in construction: roles, buyout and why it fails

A general contractor that wins a project has, at that moment, sold something it does not yet own. Most of the building will be put in place by subcontractors and built from materials and equipment that other companies make, ship and install. Between contract award and the first shovel in the ground, the contractor must turn the estimate into dozens of signed subcontracts and purchase orders, at prices that fit the budget, with scopes that fit together, on schedules that let the work happen in the right order. That process is called buyout, and the wider discipline of planning, sourcing, contracting for and delivering everything the project needs is construction procurement. This course is about doing it well.

Procurement sits between the other parts of the construction program. Estimating and bidding (CON-200 and CON-300) produce the prices and scope sheets that procurement starts from. Contract law, standard forms, payment and liens (CON-220) set the legal rules. Scheduling (CON-210) says when each package is needed. Cost control (CON-310) tracks what the buyout commits. Finance (CON-320) cares about the cash that subcontracts and supplier terms consume. Delivery methods are covered in CON-340, and risk, insurance and surety in CON-350. This course connects them from the buyer's side of the desk.

What gets bought, and by whom

On a typical building project a general contractor self-performs only a small share of the work, often concrete, rough carpentry, general labour and site services, and buys the rest. Industry estimates commonly put subcontracted work at 70 to 90 % of contract value on commercial buildings, though the share varies with the contractor's trades and the project type. What is bought falls into four broad groups.

The people involved vary with the size of the firm. In a small company the project manager may do everything from issuing the invitation to bid to signing the subcontract. Larger contractors separate the work among several roles.

The procurement cycle

Every package, whether a $40,000 painting subcontract or a $5 million mechanical subcontract, moves through the same broad steps. The steps take different amounts of time and effort, but skipping one usually costs more later than it saves now.

Buyout: turning the estimate into commitments

Buyout is the period, usually the first weeks or months after award, in which the contractor converts the estimate's trade budgets into signed commitments. The tool that tracks it is the buyout log: one line per package, showing the budget carried in the estimate, the amount actually committed, the difference, and the status. Any saving (committed below budget) or loss (committed above budget) flows straight to the project's forecast margin, so the buyout log is one of the first cost reports the project team and senior management look at.

Throughout this course we follow one invented project. Halyard Construction has won a stipulated-price contract to build Larch Street Residences, a six-storey mixed-use building: a concrete podium with ground-floor retail and parking, five storeys of wood-frame apartments above (72 units), two elevators and a flat roof with mechanical equipment. The contract price is $36.4 million. Halyard self-performs concrete formwork and placing and buys almost everything else.

# Larch Street Residences - buyout log at week 6 after award (illustrative)
packages = [  # (package, estimate budget, committed or None if not yet awarded)
    ("Excavation and shoring",        1_450_000, 1_392_000),
    ("Reinforcing steel",               820_000,   865_500),
    ("Ready-mix concrete (PO)",          910_000,   884_000),
    ("Wood framing",                   3_900_000, 3_745_000),
    ("Mechanical",                     5_600_000, 5_812_000),
    ("Electrical",                     3_700_000, 3_598_000),
    ("Elevators",                        640_000,   702_000),
    ("Windows and storefront",         2_350_000, None),
    ("Exterior cladding",              1_780_000, None),
    ("Roofing",                          610_000, None),
    ("Fire protection",                  690_000,   655_000),
    ("Drywall and ceilings",           2_250_000, None),
]
bought = [(p, b, c) for p, b, c in packages if c is not None]
open_ = [(p, b) for p, b, c in packages if c is None]
for p, b, c in bought:
    print(f"{p:26} budget {b:>10,}  committed {c:>10,}  {b - c:>+9,}")
net = sum(b - c for _, b, c in bought)
print(f"Net buyout result on awarded packages: {net:+,}")
print(f"Awarded: {len(bought)} packages, {sum(b for _, b, _ in bought):,} of budget")
print(f"Still to buy: {len(open_)} packages, {sum(b for _, b in open_):,} of budget")

Excavation and shoring     budget  1,450,000  committed  1,392,000    +58,000
Reinforcing steel          budget    820,000  committed    865,500    -45,500
Ready-mix concrete (PO)    budget    910,000  committed    884,000    +26,000
Wood framing               budget  3,900,000  committed  3,745,000   +155,000
Mechanical                 budget  5,600,000  committed  5,812,000   -212,000
Electrical                 budget  3,700,000  committed  3,598,000   +102,000
Elevators                  budget    640,000  committed    702,000    -62,000
Fire protection            budget    690,000  committed    655,000    +35,000
Net buyout result on awarded packages: +56,500
Awarded: 8 packages, 17,710,000 of budget
Still to buy: 4 packages, 6,990,000 of budget

Six weeks in, Halyard has awarded eight packages. Savings on excavation, framing, electrical and some materials are partly offset by losses on mechanical, reinforcing steel and elevators, for a small net saving. Four packages worth about $7 million are still open. The important point is not the net figure on any one day but the trend and the exposure: the open packages include the window and storefront package, which is both long-lead and, on this project, the one with the widest spread of bids. A buyout log that shows only the net saving can hide the fact that the riskiest decisions are still ahead.

Why procurement fails

When projects go wrong, procurement decisions are often near the root. Post-project reviews and claims files show the same patterns again and again.

These failures share a theme: they are cheap to prevent before award and expensive to fix after. A scope gap found during scope review is a line on a meeting agenda; the same gap found when the drywall is closed is a change order the owner will not pay for, a delay and an argument. Most of this course is about catching problems while they are still cheap.

Value, not just price

The lowest price is not the best buy if the trade cannot deliver. Good procurement looks at total value: price, but also scope completeness, schedule, quality, safety record, financial strength and the cost of managing the relationship. A subcontractor who is $30,000 cheaper but needs a full-time project engineer to chase its submittals, misses milestones and leaves deficiencies at handover may cost far more. Lesson 4 shows how to weigh these factors without losing the discipline of competitive pricing.

Ethics and fairness in buying

Procurement involves money, competition and discretion, so it attracts temptation. Construction associations and public owners set out expectations that also make good business sense: treat bidders consistently, keep bid prices confidential, do not shop one bidder's price to another to drive it down after the close, avoid conflicts of interest, and decline gifts that could look like inducements. Bid shopping and bid peddling in particular damage trust and, over time, the quality of bids a contractor receives.

In Canada, bid depositories in several provinces and the Canadian Construction Association's tendering practices are designed partly to discourage bid shopping. Public owners also impose integrity rules: the federal Ineligibility and Suspension Policy can bar suppliers convicted of certain offences from federal contracts, and provincial procurement directives set conflict-of-interest and gift rules for public buyers.

Fair dealing is not only an ethical point. Subcontractors remember which contractors share their prices, change scopes after the fact or delay payment, and they price the next bid accordingly. A reputation as a fair buyer is part of a contractor's competitive advantage.