The QuickHMI standalone runtime provides the central server processes within the live environment and it communicates with the connected devices (PLC, Database, etc.).
The QuickHMI Viewer (Clients) and the browsers connect with the QuickHMI server (Part of the QuickHMI standalone runtime).
The QuickHMI standalone runtime is usually installed on a separate pc or server. But the installation can also be effected on a Client-PC.