| Fill quantity drifts | Air, chamber refill, product temperature, hopper level, leakage, seal condition and measurement method. | Sequential results by head with settings and product condition. |
| Drips or strings | Nozzle closure, suck-back, pressure, dwell, product temperature and distance to the pack. | Slow-motion video or photographs plus accepted and rejected samples. |
| Particles block or break | Every valve, bend and nozzle opening against the largest normal inclusion. | Before-and-after product comparison and location of the restriction. |
| Air pockets or foam | Feed suction, hopper return, agitation, fill profile and nozzle position. | Product density, visible bubbles and fill-settling observations. |
| Container jams | Pack tolerances, guide settings, transfers, static, accumulation and filled-pack stability. | Marked containers, jam location and video of the transfer. |