The building sector faces the dual challenge of reducing energy demand while ensuring healthy indoor environments. Passive House standards, LEED certification, and Lean Construction each provide effective strategies for sustainable project delivery, yet limited research addresses how these approaches can be systematically integrated. This study develops and evaluates a conceptual framework that aligns LEED principles with Lean methods to enhance the design and delivery of Passive House projects. Adopting a case study methodology, the research examines how LEED strategies—such as high-performance ventilation, thermal comfort, and material sustainability—can be reinforced by Lean tools including value-stream mapping, workflow optimization, and waste reduction. The framework identifies synergies between LEED credits and Lean practices, creating a structured decision-making process that supports both sustainability and efficiency objectives. Data analysis highlights reductions in operational energy use, improvements in indoor air quality indicators, significant decreases in construction waste, and measurable gains in delivery timelines. The findings demonstrate how certification-based sustainability measures and process-driven efficiency methods can be operationalized together, offering a replicable model for future projects. This research contributes to bridging a critical knowledge gap and provides actionable insights for designers, contractors, and policymakers aiming to deliver low-carbon, energy-efficient buildings that prioritize occupant health and environmental responsibility.
Esra Tepeli (Tue,) studied this question.