Independent, RPEQ-certified constructability audits that identify design risks, optimise buildability, and protect your infrastructure project from costly construction issues before they occur.
Investing in a constructability review before construction begins is one of the most cost-effective risk management strategies available to infrastructure project owners.
Identify design inefficiencies, material over-specification, and construction methodology improvements that can deliver measurable cost savings before a single item of plant arrives on site. Industry data consistently demonstrates that constructability reviews return significant multiples of their cost in avoided rework and design changes.
Uncover potential construction challenges, clashes between disciplines, and sequencing conflicts during design, when changes are inexpensive and straightforward. Addressing these issues early prevents costly variations, delays, and disputes during construction delivery.
Design issues discovered during construction are the leading cause of project delays. A constructability audit identifies and resolves these issues during the design phase, protecting your construction programme and reducing the likelihood of costly extensions of time.
Assess construction methodology for workplace health and safety risks, identify hazardous work activities, and recommend safer alternatives. A constructability audit that considers safety during design delivers better outcomes for everyone involved in project delivery.
Clear, constructable designs with well-defined scope produce better tender responses. Contractors can price with greater confidence when documents are unambiguous, resulting in more competitive bids and fewer provisional sums or qualifications in tender submissions.
Constructability reviews consider not just the initial build cost but also long-term maintenance access, durability of materials and details, and operational requirements. This whole-of-life perspective ensures infrastructure assets deliver value well beyond the construction phase.
Cenex follows a structured, five-phase methodology that ensures comprehensive coverage while delivering actionable recommendations within your project timeline.
We define the audit scope, collect all relevant project documents, and review the design brief, geotechnical data, environmental constraints, and site conditions. This preparation phase ensures our review is focused and contextually informed.
Our RPEQ-certified engineers systematically review all construction documentation, assessing buildability, methodology, sequencing, access, temporary works, and interdisciplinary coordination against industry best practice.
We compile a detailed register of identified constructability issues, categorised by severity, discipline, and potential impact on cost, programme, and safety. Each issue is clearly documented with reference to the relevant drawings and specifications.
For each identified issue, we provide practical, implementable solutions based on our construction delivery experience. Recommendations include cost and programme impact assessments to support informed decision-making by the project team.
We deliver a comprehensive constructability audit report and present findings to the project team. We remain available to support the design team in implementing recommendations and can verify that changes have been incorporated correctly.
Our constructability audits cover every aspect of the design that influences how the project will be built, maintained, and operated throughout its lifecycle.
We verify that designs are coordinated across all disciplines, checking for clashes between structural, civil, drainage, utilities, and services elements. We assess compliance with relevant Australian Standards, TMR specifications, and project-specific requirements, identifying gaps or conflicts that could cause issues during construction.
We evaluate whether the proposed design can be practically constructed using available equipment, techniques, and labour resources. This includes assessing construction tolerances, formwork complexity, reinforcement congestion, pour sequences, and whether the design allows for efficient prefabrication or modular construction where appropriate.
We review the proposed construction sequence to identify logical dependencies, potential bottlenecks, and opportunities for programme optimisation. For projects adjacent to live infrastructure, we assess staging plans to ensure they maintain safe operations while allowing efficient construction progress.
We assess equipment access routes, laydown areas, material storage requirements, and site logistics. This includes evaluating haul routes, crane reach and lifting requirements, heavy vehicle access, and whether the site can accommodate the plant and equipment needed for the proposed construction methodology.
We identify temporary works requirements including shoring, dewatering, propping, falsework, and temporary traffic management. We assess whether temporary works have been adequately considered in the design and whether safe work methods exist for all proposed construction activities, particularly working at heights, confined spaces, and proximity to live services.
We review environmental management requirements and their impact on construction methodology, including waterway management, erosion and sediment control, fauna exclusion, noise and vibration limits, and working hour restrictions. We assess whether the design adequately accounts for environmental approval conditions that will constrain construction activities.
We assess material specifications for local availability, lead times, and supply chain risks. This includes evaluating whether specified materials can be sourced within Queensland, whether alternative materials could deliver equivalent performance at lower cost or shorter lead time, and whether material specifications create unnecessary procurement risk.
Answers to common questions about constructability audits and how they benefit infrastructure projects.
A constructability audit is an independent, structured review of project designs and construction documents conducted by experienced construction professionals. The purpose is to assess whether the design can be built efficiently, safely, and cost-effectively. The review identifies potential construction challenges, design conflicts, sequencing issues, and opportunities for improvement before construction begins, reducing risk and avoiding costly changes during delivery.
Constructability audits deliver the greatest value when performed during the design development phase, ideally at the 50% to 80% design completion stage. At this point, the design is sufficiently developed to allow meaningful review, but there is still time to incorporate changes without significant cost or schedule impact. However, audits can also be performed at concept design stage for early risk identification, or at the pre-tender stage to ensure bid documents are clear and complete.
While a design review focuses on whether the design meets technical standards, codes, and specifications, a constructability audit evaluates whether the design can be practically built in the field. Constructability audits consider factors such as equipment access, construction sequencing, temporary works requirements, material availability, site constraints, and the overall feasibility of the proposed construction methodology. The audit is typically conducted by professionals with hands-on construction experience rather than design engineers.
Effective constructability auditors should combine engineering qualifications with significant hands-on construction experience. In Queensland, holding RPEQ (Registered Professional Engineer of Queensland) certification demonstrates a recognised standard of competence. Auditors should have direct experience managing or delivering similar infrastructure projects, understand local construction practices and constraints, and be independent from the design team to provide unbiased assessments. Cenex's auditors hold RPEQ certification and bring extensive experience across roads, bridges, rail, and civil infrastructure delivery.
A constructability audit typically delivers a comprehensive report that includes an executive summary of key findings, a detailed register of identified constructability issues ranked by severity and potential impact, recommended solutions and alternative approaches for each issue, an assessment of construction methodology and sequencing, identification of temporary works requirements, and a risk assessment covering schedule, cost, and safety implications. Cenex also provides cost impact estimates for identified issues and recommended changes.
A constructability audit typically represents a small fraction of total project cost, generally between 0.1% and 0.5% of the construction value. However, the return on investment is substantial. Industry research consistently shows that constructability reviews can deliver savings of 5% to 15% of construction costs by identifying issues before they become expensive field changes. On a $50 million infrastructure project, even a conservative 5% saving represents $2.5 million in avoided costs, making the audit one of the highest-value investments a project owner can make.
Our RPEQ-certified engineers are ready to review your infrastructure project designs and identify opportunities to reduce risk, optimise buildability, and protect your investment. Get in touch to discuss your constructability audit requirements.