Performance contracts used for servitized business models enable consideration of overall life-cycle costs rather than just production costs. However, practical implementation of performance contracts has been limited due to challenges with performance evaluation, accountability, and financial concepts. As a solution, this paper proposes the connection of the digital building twin with blockchain-based smart contracts to execute performance-based digital payments. First, we conceptualize a technical architecture to connect blockchain to digital building twins. The digital building twin stores and evaluates performance data in real-time while the blockchain ensures transparency and trusted execution of automatic performance evaluation and rewards through smart contracts. Next, we demonstrate the feasibility of both the concept and technical architecture by integrating the Ethereum blockchain with digital building models and sensors via the Siemens building twin platform. The resulting prototype is the first full-stack implementation of a performance-based smart contract in the built environment.

翻译：用于保守商业模式的履约合同可以考虑整个生命周期成本,而不仅仅是生产成本。然而,由于绩效评估、问责和财务概念方面的挑战,履约合同的实际执行受到限制。作为解决办法,本文件提出将数字建筑双轨与基于链式的智能合同挂钩,以实施基于绩效的数字支付。首先,我们构思一个技术架构,将连锁链与数字建筑双胞胎连接起来。数字建筑双行商店实时评估绩效数据,而组合链则通过智能合同确保自动绩效评估和奖励的透明度和可信赖的执行。接下来,我们通过Siemens建筑双平台将Etheinum连锁与数字建筑模型和传感器相结合,展示了概念和技术结构的可行性。由此形成的原型是在建筑环境中首次全面实施基于绩效的智能合同。