Green strategies for future sustainability come from concern for climate change, global warming, excessive energy consumption, and increased pollution in the world. One of the sectors that have a very big impact on environmental damage is the construction and building industry sector. This sector contributes globally to 1/3 of carbon emissions, 1/3 of resource consumption, 40% of energy consumption, 40% of waste, and 25% of water consumption in the world (PNUE-SBCI, 2018). The Operation-Maintenance phase is known as the longest phase of the building life cycle. This phase has the highest percentage of energy consumption and produces the highest CO2 emissions compared to other phases.
This study aims to produce a model of sustainable green operation and maintenance management for existing buildings. Data collection was carried out through interviews and questionnaire surveys which were distributed to 103 respondents consisting of experts, practitioners, bureaucrats, environmental activists, and managers of green building facilities in Indonesia. The three main groups of factors that affect the performance of sustainable green-based building management in this phase consist of support and facilitating (SUPF), management practices (MAPR), and refurbishment and upgrading (REUP). The research instrument was developed through the CVI method and the model was built and analyzed using Structural Equation Modeling (SEM)-PLS. The validation and model test were carried out on six existing buildings through an independent assessment from the building manager.
The final model produced consists of support and facilitating (3 dimensions and 10 indicators), management practices (5 dimensions and 19 indicators), refurbishment and upgrading (4 dimensions and 19 indicators), and sustainable building performance (3 dimensions with 19 indicators). The results also showed that the success of operation management and sustainable green maintenance for existing buildings was influenced by support and facilitating (path coefficient = 0.348), management practices (path coefficient = 0.242), and refurbishment and upgrading (path coefficient = 0.393). There is also a resulting R2 value of 0.768 and this indicates that the influence of the three main factors is in the substantial category. The findings of this study provide insights and guidance for building owners and managers in formulating a comprehensive strategy toward sustainable green maintenance-operations management for existing buildings.
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