Most retirement decisions get made at the pallet level: the refresh hits, everything three years old goes. It's operationally simple — and it routinely retires equipment with warranty coverage remaining, healthy components, and real redeployment or resale value.
The opposite mistake costs more quietly: redeploying tired hardware to save money, then paying for it in failures, support tickets, and a second disposition cycle anyway.
Per-unit assessment splits the difference with data: warranty status checked per serial, diagnostics run per device, and a defensible decision for each — redeploy the healthy units back into the fleet, route the rest into certified disposition with full evidence. The healthy half funds the program; the tired half exits cleanly.
Per-unit assessment turns a guess into a spreadsheet — and usually finds money in the pile.