Harvest Index Calculator
Machines in this category rarely fail outright — they degrade, and the nameplate is quoted at a lab condition no kitchen has. This turns “it is not making enough ice” into a number: measured lbs per 24h against the nameplate rating derated for your room air and inlet water, then a branch naming the test, the instrument, the expected reading and the part cost.
Batch counting suits bullet and clear-cube machines that drop a tray at a time. Nugget and undercounter machines run continuously — empty the bin, run for a set number of hours and weigh what comes out.
The figure on the data plate, not the marketing headline.
Measured at the intake grille, not the thermostat down the hall.
Run the tap 20 seconds, then read the water you actually pour in.
Drop to drop, timed with a phone, from a warm start.
Count one full drop, including any that come out hollow.
Piece mass used: bullet 0.30 oz, small clear cube 0.55 oz, large clear cube 0.95 oz.