Refers to PES equipment status. The PES is approved when it has operated properly and the plant wishes to use it in low risk and selected high business risk applications (e.g., equipment or production loss, but no environmental or safety hazard). The plant reviews the PES performance, checks plant PESs against the latest producer ECO levels, and finds no changes. The equipment is elevated to plant approved. Note that the PES must be approved before it is plant approved.