Constructibility Reviews

Why Constructibility Reviews Matter
In the CMAA Certified Construction Manager (CCM) body of knowledge, constructibility reviews sit squarely within Quality Management, but they touch nearly every other practice area: cost, schedule, risk, safety, and contract administration. The reason is simple. The single greatest driver of change orders, claims, rework, and schedule slippage on construction projects is a design that cannot be built efficiently, safely, or exactly as drawn. The construction manager (CM) is uniquely positioned—armed with field experience the design team may lack—to catch these problems before they become expensive. CMAA emphasizes that the cost to fix a problem rises dramatically as a project moves from planning to design to construction to operations. A constructibility issue caught at 60% design costs a few hours of a reviewer's time; the same issue caught in the field can cost weeks of delay and six-figure change orders. Understanding constructibility reviews is therefore essential both for passing the CCM exam and for performing the CM role effectively.

What a Constructibility Review Is
CMAA defines constructibility (sometimes spelled "constructability") as the optimum use of construction knowledge and experience in planning, design, procurement, and field operations to achieve overall project objectives. A constructibility review is the structured, systematic examination of the design documents by experienced construction professionals to determine whether the project, as designed, can be built efficiently, safely, economically, and with the intended quality, using available labor, materials, equipment, and methods under the site's actual conditions.

Key characteristics the exam expects you to know:
• It is a proactive, preventive quality tool, not a reactive inspection. It belongs to the quality assurance side of quality management, not quality control.
• It is performed by construction-experienced personnel—the CM, field superintendents, estimators, schedulers, and specialty trade experts—rather than by the designer alone.
• It is iterative, conducted at multiple design milestones (typically schematic design, design development, and construction documents at roughly 30%, 60%, 90%, and 100%).
• It is documented in a formal report with comments, recommendations, responses from the designer, and a tracking log to closure.
• It is distinct from, but complementary to, design review (code compliance and design intent), value engineering (function and cost), and interdisciplinary coordination/clash detection (conflicts among drawings).

Constructibility vs. Related Reviews (Common Exam Confusion)
Design review asks: Does the design meet the owner's program, codes, and standards? Value engineering asks: Can the required function be achieved at lower life-cycle cost? Constructibility review asks: Can this be built as drawn, and is there a more practical way to build it? Coordination review asks: Do the architectural, structural, mechanical, electrical, and civil drawings agree with each other? On the exam, read the question stem for the key verb. If the question is about sequencing, access, means and methods, tolerances, or field practicality, the answer is constructibility.

How a Constructibility Review Works
1. Planning the Program. The CM, in the Construction Management Plan (CMP) and Quality Management Plan, establishes when reviews will occur, who participates, what checklists will be used, how comments are logged, and how disputes between CM and designer will be resolved. Early involvement is the principle: the greatest ability to influence cost exists at the beginning of the project.

2. Assembling the Review Team. Ideal participants include the CM's project manager, field superintendent, estimator, scheduler, safety manager, and specialty consultants (e.g., curtain wall, deep foundations, MEP). On CM-at-Risk projects, trade contractors may be engaged during preconstruction. The owner's operations and maintenance staff may also contribute input on access and maintainability.

3. Conducting the Review at Each Milestone.
• Schematic/Conceptual (approx. 30%): Site logistics, laydown and access, major structural systems, foundation approach, phasing with ongoing operations, long-lead procurement, modularization or prefabrication opportunities, overall feasibility of the schedule.
• Design Development (approx. 60%): System selection, structural framing practicality, MEP routing and clearances, crane and hoisting requirements, excavation support, weather sensitivity, repetitive details to improve productivity.
• Construction Documents (90%–100%): Dimensional accuracy and tolerances, completeness of details, specification compatibility with drawings, availability of specified materials, biddability and clarity, sequencing conflicts, safety provisions (fall protection anchorage, confined spaces), and commissioning and start-up logic.

4. Typical Items Examined. Site access and traffic; utility relocations; temporary facilities; soil conditions and dewatering; crane reach and pick weights; formwork and shoring practicality; congestion in ceilings and chases; installation sequence (e.g., equipment that must be set before walls are closed); tolerance stacking between trades; standardization and repetition; use of local materials and labor skills; maintainability and operability; and the realism of specified construction methods.

5. Documenting and Tracking. Each comment is logged with a unique number, sheet/spec reference, description, recommendation, priority, responsible party, designer response, and status. CMAA stresses that the designer retains design responsibility; the CM recommends but does not redesign. Unresolved items are escalated to the owner for decision. A closed-loop process ensures each comment is resolved, incorporated, or formally rejected with rationale.

6. Measuring Results. Benefits include fewer RFIs and change orders, reduced rework, improved schedule reliability, better safety, lower cost, and higher-quality bids because contractors price fewer unknowns. Many owners track cost avoided per review hour invested.

Constructibility Across Delivery Methods
Under Design-Bid-Build with Agency CM, the CM performs reviews as the owner's agent during design, since contractors are not yet selected. Under CM-at-Risk, the CMR's preconstruction services explicitly include constructibility, often with trade partner input, feeding into the GMP. Under Design-Build, constructibility is largely internalized by the design-builder, and the owner's CM focuses on verifying that the process is occurring and that owner requirements are protected. The exam may ask which delivery method naturally integrates constructibility—design-build and CMR are the usual answers.

Relationship to Other CMAA Practice Areas
• Cost Management: Reviews reduce contingency draw and change-order exposure.
• Time Management: Reviews validate sequencing and the realism of the master schedule.
• Risk Management: Reviews identify and mitigate construction-phase risks early.
• Safety Management: Prevention through design—eliminating hazards before they reach the field.
• Contract Administration: Clearer documents reduce RFIs, disputes, and claims.
• Sustainability: Reduced waste and rework support environmental goals.

Exam Tips: Answering Questions on Constructibility Reviews
Tip 1 – Timing is almost always "as early as possible." If a question asks when constructibility input is most valuable, choose the earliest design phase offered. The influence curve favors early involvement; cost of changes increases over time.

Tip 2 – Identify the right performer. The correct answer typically involves construction-experienced personnel (CM, superintendent, estimator, trade experts), not the architect reviewing their own work and not the owner's accounting staff.

Tip 3 – Classify correctly within Quality Management. Constructibility review is quality assurance (process-oriented, preventive, design phase). Inspection and testing of installed work is quality control (product-oriented, construction phase). Do not confuse the two.

Tip 4 – Distinguish from value engineering. If the question mentions function analysis, life-cycle cost, or alternative materials to reduce cost, that is VE. If it mentions sequence, access, tolerances, means and methods, or whether something can physically be built, that is constructibility.

Tip 5 – Remember who owns the design. The CM recommends; the designer decides and remains professionally responsible. An answer suggesting the CM "revises the drawings" or "assumes design liability" is wrong under CMAA practice.

Tip 6 – Think in terms of outcomes. Questions about the purpose or benefit of constructibility reviews should be answered with: fewer change orders and RFIs, reduced rework, improved schedule reliability, enhanced safety, lower cost, and more competitive, accurate bids.

Tip 7 – Documentation and closure. If a scenario describes comments made but never tracked, the CMAA-preferred answer involves a formal comment log with responses and status to closure, and escalation of unresolved items to the owner.

Tip 8 – Apply the "best answer" discipline. CCM questions often present several plausible choices. Eliminate options that are reactive (fixing problems in the field), that bypass the designer, or that place the review late in the process. The CMAA philosophy is proactive, collaborative, documented, and owner-focused.

Tip 9 – Watch for delivery-method cues. If the stem says CM-at-Risk or design-build, expect the answer to involve integrating trade contractor or builder knowledge during preconstruction. If it says Agency CM on design-bid-build, the CM performs the review as the owner's advisor before bidding.

Tip 10 – Know the checklist mindset. Be ready to recognize typical review items: site logistics, crane access, long-lead items, phasing around occupied facilities, specification-drawing conflicts, dimensional tolerances, prefabrication opportunities, and safety-in-design provisions.

Sample Question Walkthrough
Question: During the design development phase of a hospital addition, the CM notes that specified rooftop air handling units cannot be set by crane because of an adjacent helipad flight path. What is the CM's most appropriate action?
(A) Instruct the mechanical contractor to use a smaller unit.
(B) Revise the mechanical drawings to relocate the units.
(C) Document the issue in the constructibility log and recommend the designer evaluate alternative unit locations or a knockdown unit, with the owner making the final decision.
(D) Wait until the units are delivered and resolve it in the field.

Analysis: (A) presumes authority the CM does not have and skips the designer. (B) has the CM performing design. (D) is reactive and violates the early-intervention principle. (C) is correct: document, recommend, respect the designer's responsibility, and involve the owner in the decision.

Key Takeaways
Constructibility review is a proactive quality assurance tool in which construction-experienced professionals systematically evaluate design documents at multiple milestones to ensure the project can be built efficiently, safely, and economically. It is performed earliest for greatest benefit, is documented and tracked to closure, respects the designer's authority and liability, and produces measurable reductions in change orders, RFIs, rework, delay, and risk. For the CCM exam, anchor your answers in early involvement, the right participants, QA versus QC, differentiation from VE and design review, formal documentation, and the owner-advisor role of the CM.