Define the evaluation horizon
Choose a planning period, currency, accounting basis and financing assumptions. Keep taxes, exchange-rate exposure, inflation and residual value explicit. Use written quotations and your own finance data; no market price is supplied here.
Ownership cost components
A planning identity is: total ownership cost = acquisition + financing + installation + instruments and accessories + service + staffing and training + facility costs − residual value. Each term must use the same horizon and accounting basis. This is not a reimbursement or profitability forecast.
Volume & sensitivity
Divide consistently allocated costs by completed cases only when the denominator and period are explicit. Compare low, expected and high-volume scenarios using institution-supplied assumptions. Test procedure mix, downtime, instrument replacement and staffing changes. Zero cases makes cost per case undefined. Do not infer savings or a break-even point without a validated comparator and local revenue data.