Constructability Reviews: How to Close the Gap Between Design and Construction

A constructability review is a documented, multidisciplinary evaluation of whether a design can be built safely, efficiently, and in accordance with the contract requirements. Unlike a general quality-control check, it examines how design decisions interact with construction access, sequencing, temporary conditions, available workspace, labor and equipment needs, utilities, traffic, schedule, cost, and site constraints.

Most engineers have experienced some version of the same call: a contractor in the field asking how a sequence shown in the plans is supposed to work in practice.

The answer that made perfect sense at your desk suddenly sounds a lot less convincing out loud.

That gap between what gets designed and what gets built is where projects often lose time, money, and credibility. Closing it requires more than careful drafting. It demands a deliberate focus on constructability throughout the design process, not as a last-minute review when questions arise in the field.

Why Constructability Matters

Constructability is a common topic in project delivery discussions because the underlying challenge is familiar across projects of all sizes: designs that are technically correct but difficult to execute in the field. The result is avoidable rework, schedule impacts, cost increases, and friction between the design team and contractor.

Change orders are one of the most visible symptoms. A constructability issue identified during design may take only a short amount of engineer time to resolve. The same issue discovered during construction can lead to contractor downtime, significant additional costs, and formal contract modifications. Across a project, those costs can add up quickly.

Another common challenge involves construction sequencing. Infrastructure projects are rarely built in a simple, linear progression, and plan sets do not always communicate that reality clearly. Contractors working from multiple sheets may interpret staging differently than intended, creating conflicts between work activities, traffic management requirements, and project schedules.

The earlier constructability concerns are identified, the easier and less expensive they are to address.

What a Strong Constructability Review Process Looks Like

One of the most common misconceptions about constructability reviews is that they happen at the end of design. Treating constructability as a single final checkpoint limits its effectiveness.

Effective constructability reviews occur throughout the project lifecycle, including conceptual design, preliminary engineering, final design, and pre-bid phases. Each stage provides an opportunity to identify different types of issues before they affect construction.

Early reviews often focus on high-level sequencing and feasibility questions. Does the proposed phasing conflict with utility relocations? Can drainage improvements be constructed without disrupting adjacent roadways? Are traffic control requirements compatible with the proposed work sequence?

These issues are relatively inexpensive to address during design but significantly more costly once bidding begins.

As designs advance, reviews typically shift toward coordination and plan clarity. Are construction details consistent throughout the plan set? Do profiles, cross-sections, and plan views align? Can a contractor reasonably construct what’s shown without making assumptions?

These questions may seem straightforward, but under tight schedules and production demands, inconsistencies can easily go unnoticed.

Several practices can help make constructability reviews more effective.

Bring Field Experience into the Process

Reviewing your own design for constructability is often more difficult than it appears. Engineers with field experience frequently identify concerns that may not be obvious from a desktop review alone.

Whether through construction-phase experience, DOT field work, or contractor collaboration, involving professionals who understand how work is actually performed can provide valuable perspective. Their input should be integrated as a meaningful part of the review process, not simply checked off as a requirement.

Review Plans from the Contractor’s Perspective

One useful exercise is to evaluate the plan set the same way a contractor would during bid preparation.

Ask questions such as:

• Where are sequencing assumptions being made?
• Which details could be interpreted in multiple ways?
• What information is needed to develop staffing, equipment, and traffic control plans?

Areas of uncertainty often become requests for information (RFIs), field conflicts, or costly revisions during construction.

Verify Coordination Across Disciplines

Many constructability issues result from coordination gaps rather than fundamental design flaws.

A drainage structure may not match profile information. A traffic control plan may conflict with grading limits. Utility information may appear differently across plan sheets.

Systematically cross-checking information across disciplines helps uncover inconsistencies that individual reviewers may overlook.

The Role of Peer Checks

Constructability reviews are only one part of a comprehensive quality-control process. Peer checks provide a complementary perspective by focusing on technical accuracy and compliance.

Although the two activities are closely related, they serve different purposes. One is about correctness. The other is about practicality. Projects benefit most when both perspectives are applied independently rather than combined into a single review effort.

A peer check typically focuses on verifying calculations, confirming compliance with applicable standards, checking quantities, and reviewing technical accuracy. A constructability review asks a different question: can a contractor reasonably construct what’s shown in the plans?

The review team should match the project’s risks and delivery method. Depending on the project, participants may include:

• The project manager
• Discipline leads
• Construction personnel
• Estimators
• Schedulers
• Utility coordinators
• Maintenance or operations representatives
• Safety and traffic-control specialists
• An owner representative

One person should facilitate the review, maintain the comment log, assign responsible parties, and confirm closure.

For peer checks to deliver value, several elements are important:

• Reviewers should be sufficiently independent from the original design effort.
• Reviews should follow a defined scope and checklist rather than a general request to “look it over.”
• Comments should be specific and actionable.

Vague feedback often creates additional uncertainty instead of resolving it. Each review comment should identify the location of the issue, describe the concern, explain the potential construction impact, and recommend an action when appropriate.

A comment log should also identify the responsible discipline, priority, response, disposition, and closure status. This record prevents comments from being lost between review cycles and creates an auditable explanation of design decisions.

Translating Plans into Real-World Build Sequences

Construction sequencing is often where technically correct designs encounter practical constraints. A design can satisfy every technical requirement and still create challenges in the field if staging, access, and traffic control constraints were not fully considered during development.

Evaluating access, staging, traffic control, and temporary conditions during design can help prevent conflicts that may not be apparent from plan sheets alone.

This does not mean prescribing exactly how a contractor must perform the work. Instead, it means understanding likely construction sequences and ensuring the design accommodates them.

During design development, consider questions such as:

• Can haul road access be established before major grading begins?
• Is there adequate space for staging materials and equipment?
• Does drainage infrastructure need to be operational before other activities can proceed?
• When traffic control phases change, can the remaining work still be completed safely and efficiently?

For example, a roadway widening plan may show a proposed drainage structure that is technically correct but located where excavation would block the only construction access route. An early review could identify the conflict and allow the team to revise the sequence, temporary access, or structure location before bidding.

If discovered after mobilization, the same issue could cause an RFI, idle equipment, traffic-control changes, and a change order.

Maintenance and protection of traffic (MPT) is one area where sequence planning becomes especially important. Traffic conditions influence nearly every aspect of a highway project, including staging, work zone geometry, delivery schedules, crew access, and safety considerations.

Designs that account for these realities early in the process generally produce more effective traffic control plans and fewer construction conflicts. By contrast, projects that treat MPT as a late-stage deliverable often face avoidable challenges once construction begins.

Alternative Delivery and What It Changes

Alternative delivery methods such as design-build and CM/GC introduce constructability considerations earlier in the project development process.

When contractors are involved during design, valuable feedback can be incorporated before plans are finalized. This can help identify potential construction challenges, improve sequencing, and reduce downstream conflicts.

At the same time, earlier contractor involvement places additional responsibility on the design team. Engineers must be prepared to evaluate proposed alternatives, justify design decisions, and distinguish between recommendations that improve constructability and those that may compromise project scope, quality, or long-term performance.

As alternative delivery continues to expand across transportation programs, understanding how constructability responsibilities change under different delivery models is becoming increasingly important.

The Habit that Closes the Gap

The gap between the office and the field does not close on its own. It closes when engineers incorporate constructability considerations throughout the design process rather than treating them as a final review exercise.

Successful teams tend to have a few practices in common:

• Peer checks are structured and independent.
• Constructability reviews occur early enough to influence outcomes.
• Plan sets communicate sequencing and coordination clearly enough to support successful construction.

Taken together, these practices help ensure that design intent aligns with real-world construction conditions.

None of this requires a dramatic change in workflow. It simply requires asking one additional question throughout the design process:

“Can this be built safely, efficiently, and as intended?”

The earlier that question is asked, the more valuable the answer becomes.

Earn PDH Credits with McKissock’s Constructable Highway Design Course

If you want to deepen your understanding of constructability reviews and highway project delivery, McKissock’s Constructable Highway Design course provides practical guidance drawn from real-world infrastructure projects. The course examines constructability methods, traffic management during construction, and project delivery considerations that affect both design and field execution.

For professional engineers, developing stronger constructability skills can lead to better project outcomes, fewer field issues, and more effective collaboration between design and construction teams.