SAT (Site Acceptance Test)

The SAT replays critical functional tests on site after installation and connection to utilities (electricity, compressed air, purified water, steam, process gases). We treat it as the final engineering step before the start of regulatory qualifications (IQ, OQ, PQ). The SAT verifies that nothing shifted during transport, that connections match the as-built drawings, and above all that the equipment integrates correctly into its ecosystem: OT network, central SCADA, MES, LIMS, ERP. In practice, SAT is often where network integration or OT cybersecurity defects undetected at FAT come to surface. A well-prepared SAT takes three to ten days. Poorly prepared, it can stall for several weeks over a single misconfigured firewall or a missing VLAN.