Coding and Relationships Between Construction and Maintenance Work Units and Their Life Cycle: A Study of the Economic, Environmental and Social Sustainability of Housing in Andalusia

Abstract

The holistic assessment of building life cycles requires integrating economic, environmental, and social dimensions, including occupational risks and cost management. However, building maintenance planning is often treated separately from sustainability assessment and construction cost classification systems. This study proposes a methodology that integrates maintenance and repair budgets with sustainability evaluation through a unified coding structure linking construction and maintenance work units. The approach combines economic cost analysis, environmental footprint indicators (carbon, water, energy, and ecological footprints), and occupational risk assessment within a life cycle framework. The methodology incorporates prevention through design by analyzing ergonomic and safety risks associated with construction work units and predicting future risks throughout the building’s service life. The structure has four phases: temporal planning of interventions, classification and coding of work units, impact analysis using sustainability indicators, and synthesis of results in a maintenance planning model. The data is integrated in a database using an exchange format compatible with sustainability analysis tools and BIM environments. The methodology is applied through a case study of social housing in Andalusia. Results show that maintenance interventions can be connected to construction work units in the assessment of the three dimensions.