Direct answer
Estimate annual addressable staff time and process costs, then compare them with total robot ownership or service cost after applying realistic uptime and intervention assumptions.
Baseline the current process
Measure trips, minutes, staff role, delays, error or missed-task costs and peak capacity.
Model usable automation
Apply task success, intervention, availability and adoption assumptions from a real pilot.
Include total cost
Count integration, deployment, support, consumables, internal ownership and expected replacement costs.