This work - tested on the emblematic case study of the Temple of Neptune at Paestum - serves as an exemplum for defining workflows to link monitoring data, trace their sourcing and reproduction quality throughout the modelling process, and ensure they are always up-to-date and updatable. The proposed systematisation of the so-called Scan-to-BIM approach involves setting up an ECO-System to generate cultural heritage information models through three iterative macro-phases: Data acquisition, BIM modelling and Data sharing. Particular attention is paid to the granularity of the information [LOIN] employing semiautomated procedures developed via VPL-based algorithms.