Social and ecological concerns are part of modern production systems. Circular Manufacturing Systems (CMS), which aim to extend the life of second-hand products through industrial processes such as disassembly, reworking, and reassembly, support circular economy principles by preserving the value of products and components, beyond mere raw material recycling. CMS face specific barriers, including variable quality and processing times, product-specific flows, and complex tasks requiring experienced operators. These human-intensive production systems are highly demanding from a biomechanical and cognitive point of view. In CMS, preserving the health of operators and supporting their expertise is key to performance. Moreover, monitoring CMS performance in real time is challenging due to the need to integrate operational, environmental, and social dimensions. While some studies propose Key Performance Indicators (KPIs) for CMS, few address human-related aspects. This article applies a performance dashboard construction methodology to identify a set of operational, environmental, and human-centered KPIs for real-time monitoring. It also discusses how performance should be defined in CMS and the ethical considerations of tracking human-related indicators.