Whole-of-life analysis vs point-of-delivery

Traditional procurement often focuses on point-of-delivery impacts, primarily upfront cost and embodied carbon. However, green port design increasingly adopts a whole-of-life (WOL) analysis, which considers the environmental and economic impacts over the entire lifespan of an asset. Environmental LCA follows ISO 14040 and ISO 14044 (ISO, 2006a; ISO, 2006b); life-cycle costing is a separately defined economic appraisal.

Durable materials such as reinforced concrete, steel, or engineered composites typically have higher embodied carbon and energy due to intensive production processes. However, where they are specified and built for the exposure, these materials can have lower maintenance requirements, longer service life, and reduced need for repair or replacement. In marine environments, where corrosion, abrasion, and wave forces accelerate degradation, this durability is particularly important.

For example, a high-strength concrete quay wall may have higher initial emissions than a lower-grade alternative, but if it reduces repair works and replacement cycles over a design life of 50 to 100 years, its total carbon footprint may be lower. Thus, WOL analysis allows designers to justify higher upfront impacts when an assessment for the proposed materials, exposure and maintenance regime shows net long-term benefits, shifting decision-making toward lifecycle optimization rather than short-term minimization.

Traditional procurement in port infrastructure has historically prioritized point-of-delivery metrics, focusing on upfront capital cost, performance and embodied carbon at the time of construction. While this approach offers a clear and immediate basis for comparison, it often overlooks the longer-term environmental and economic consequences associated with marine assets. In contrast, a strategic whole-of-life (WOL) analysis evaluates impacts across the entire lifecycle, from material extraction and manufacturing through to operation, maintenance, and eventual decommissioning (ISO, 2006a, ISO, 2006b). This shift in perspective is increasingly central to green port design, where decision-making prioritizes lifecycle optimization rather than short-term minimization. By incorporating factors such as durability, maintenance frequency, and operational resilience, WOL analysis enables more sustainable and informed material selection (PIANC, 2008b, PIANC, 2019).

Durable materials often have higher embodied carbon and energy, but may have lower whole-of-life impacts where they reduce or avoid maintenance works. This trade-off is particularly important in ports, where structures such as quay walls, jetties, breakwaters, and revetments are exposed to highly aggressive marine environments. Saltwater corrosion, cyclic wetting and drying, abrasion, biofouling, and climate-driven extremes, as well as the potential for impact, all contribute to accelerated material degradation. Materials such as reinforced concrete, structural steel, and engineered composites generally require energy-intensive production processes, resulting in higher initial embodied carbon. However, their enhanced durability, longer service life, and resistance to deterioration can reduce the need for frequent repairs or replacement. WOL analysis can test whether higher upfront impacts are offset by lower maintenance and replacement impacts over the design life. The result depends on the materials, exposure, construction quality and maintenance regime assessed. See also Design Engineering Aspect and associated practices.

The sustainability benefits of durable, low-maintenance infrastructure are closely linked to reductions in cumulative environmental impacts. Maintenance and repair activities in ports typically involve high-impact interventions such as dredging, piling, heavy marine plant mobilization, and material replacement. These activities generate greenhouse gas emissions, disturb marine habitats, and increase underwater noise, as well as safety considerations. By designing for durability through the use of high-performance materials, such as concrete incorporating supplementary cementitious materials, corrosion-resistant reinforcement, fiber reinforced polymers, and protective coatings, ports may reduce these recurring impacts. Although such approaches may increase initial capital costs, an environmental LCA (ISO, 2006a; ISO, 2006b) combined with a separately defined life-cycle costing can test whether reduced intervention frequency and extended service life offset those costs.

Similarly, emerging materials such as recycled plastics, hybrid composites, and advanced coatings offer the potential, in some applications, for improved durability and reduced lifecycle emissions compared to traditional materials like timber, masonry, steel, and conventional concrete. These innovations support circular economy principles by reducing material consumption and extending asset life. Ultimately, the adoption of WOL analysis enables port designers to balance upfront impacts with long-term sustainability outcomes, ensuring infrastructure investments deliver enduring environmental, social, and economic value.

In Southeast Asia, examples of the consideration in whole of life decision making for materials selection include National initiatives (e.g., Vietnamese Green Port Initiatives), as well as project specific initiatives, e.g., Singapore’s Tuas Port. In February 2023, Pan-United announced planned supply of approximately 360,000 m³ of CO2-mineralized concrete with green cement for Tuas Port over 2.5 years. The company estimated that the combined supply would avoid more than 113.8 million kg of CO2 emissions (Pan-United, 2023). This forecast is not a measurement of CO2 stored in the concrete or confirmation of completed delivery. The example shows material selection decisions locking in upfront emissions before operation; maintenance and end-of-life emissions still need to be assessed.

Viet Nam’s green port framework sets criteria for green port development and planning. Viet Nam Maritime Administration has issued a base standard on green port criteria (TCCS 02:2022/CHHVN, Decision No. 1909/QD-CHHVN of 29 December 2022), and legal frameworks for green ports are under review (Viet Nam Maritime Administration, 2024).