Everything is ready to go — the crew, the machines, the plan — then one supplier misses a delivery window and the entire jobsite grinds to a halt. A single late shipment becomes a schedule-wide problem.
Supplier reliability now matters as much as, and in some cases more than, the lowest price.
AGC’s 2025 Workforce Survey shows 78% of firms experienced construction project delays last year. Electrical equipment shortages or long lead times accounted for 35% of those delays, mechanical equipment for 25% and transportation or delivery issues for 16%.
Contractors can’t eliminate every disruption, but they can get ahead by evaluating vendor reliability, capacity and communication practices long before materials hit the jobsite.
Supplier reliability now matters as much as, and in some cases more than, the lowest price.
SUPPLIER RELIABILITY IS NOW A CORE SCHEDULE RISK
Contractors can’t assume materials and equipment will arrive as scheduled simply because an order has been placed. Lead times remain unpredictable for many critical materials and equipment categories, making procurement strategy increasingly important during project planning.
In fact, Procore’s 2025 Construction Procurement Guide notes that procurement now spans planning, logistics, approvals, coordination and delivery. Delays at any stage can affect when work begins and how efficiently project phases progress. This means supplier stability increasingly influences project execution.
Risk is highest for long-lead and critical-path items such as switchgear, transformers, HVAC equipment and specialty components. A missed shipment, material delay or unexpected lead-time extension on one of these items can delay entire phases.
WHEN PREFERRED VENDORS BECOME SINGLE POINTS OF FAILURE
Strong supplier relationships carry real value. Many contractors rely on preferred vendors for consistent quality, predictable pricing and familiarity with project requirements.
But preferred status doesn’t eliminate risk. Trusted vendors can become overloaded, face manufacturing delays or run into transportation issues. Without visibility into real-time capacity, a preferred vendor can quickly become a single point of failure.
Maintaining an A/B vendor structure for major material categories and keeping vetted backup suppliers available can help reduce disruption when problems arise.
WHAT TO EVALUATE BEYOND LOWEST PRICE
Price still matters, but it is only one measure of vendor performance. To protect the schedule, contractors are increasingly evaluating suppliers on:
- Delivery history and on-time performance
- Lead times and variability
- Production capacity and fabrication windows
- Inventory access and substitutions
- Financial stability
- Responsiveness to project questions
- Geographic reach and logistics capability
- Communication and issue resolution procedures
Together, these factors indicate whether a supplier can support the schedule, not just submit the lowest bid.
EARLY WARNING SIGNS AND QUESTIONS TO ASK
Communication is often the earliest warning sign of supplier trouble.
Unclear or inconsistent communication can create procurement delays, which makes update frequency, delivery transparency and escalation paths essential parts of planning. Early warnings create options. When suppliers raise concerns early, contractors can still make decisions. Once the delay arrives, most decisions have already been made for them.
Common red flags include:
- Vague or shifting delivery commitments
- Slow responses to project questions
- Frequent changes in the information provided
To move beyond assurances and verify readiness, contractors can ask:
- What is your recent on-time delivery performance?
- What production capacity is available?
- What inventory is available, and which items face extended lead times?
- What contingency plans exist if delivery is disrupted?
- How will schedule changes be communicated?
BUILDING A BACKUP PLAN
Procurement risks don't end once materials are ordered. FMI notes that leading contractors treat procurement as part of broader construction risk management.
That means focusing on four key actions: identifying alternate suppliers, evaluating substitution options, developing contingency plans and monitoring supplier performance before disruptions occur.
Contractors must dig deeper to understand where orders sit in the production queue, what could affect delivery and what backup options are available.
Some contractors are going a step further and bypassing the supplier to speak directly with manufacturers to verify production and transit dates.
THE SCHEDULE DEPENDS ON IT
As construction schedule risk increasingly stems from supplier performance, it deserves the same level of scrutiny contractors traditionally apply to cost.
The earlier teams evaluate supplier reliability, even with their preferred vendors, the more room they have to keep projects moving when disruptions arise.
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PHOTO CREDIT: SHUTTERSTOCK/ANDRII KOZAK
