Improving efficiency in shipyard operations requires a holistic approach that integrates emission control with Life Cycle Assessment (LCA) methodologies. This paper reviews the relevant literature on current technologies and processes, examining their environmental impact while also addressing how they can enhance productivity and cost-effectiveness in shipbuilding and repair. By investigating non-measurement-based quantification methods—approaches that do not rely on on-site data collection—shipyards can more effectively mitigate non-compliant outputs and respond to increasingly stringent global regulations. Additionally, the application of LCA principles enables decision-makers to better assess the full environmental footprint of materials, manufacturing processes, and operational activities. Within the ongoing EcoShipYard Horizon Europe project (ESY), a combination of quantitative data and real-world case studies is used to demonstrate how the adoption of these methodologies not only supports regulatory compliance and environmental sustainability but also drives innovation in shipyard design, workflow optimization, and supply chain management. The findings aim to emphasize the value of integrating emission control and LCA strategies into a cohesive framework that ensures long-term environmental performance, industrial competitiveness, and operational resilience.