How should after-sales and spare parts be evaluated when buying an automatic cooking machine?

Pin down what after-sales actually covers before signing: ask for part numbers, individual prices and lead times for the heater, gear motor, pan-temperature probe and control board, and attach that list to the contract rather than accepting verbal promises. A sensible first spare kit includes scraper blades, seals and a temperature module, plus confirmation of whether fitting them needs special tools or a factory password. Lifetime support without part numbers is unenforceable. During acceptance, have the chef cook three consecutive starchy dishes and log heat-recovery time and any odd noises from the stirring arm; treat those readings as the warranty response baseline so later claims are compared against real numbers, not opinions.