02 / Complete-line interfaces
Design normal production and the conditions that disturb it
An undefined valve seat, vent, sample point, utility, intervention or transfer zone can break the boundary even when the core filler is described as aseptic. Follow every product-contact path, return line, valve seat, tank vent, sampling point, filler circuit and environmental boundary. Include utilities that can contact product or product-contact surfaces, chemical storage and dosing, drainage, personnel/material movement and recovery after interruptions. Review startup, steady production, short stops, restart, low or high demand, format or recipe change, cleaning and shutdown. The interface must protect both the incoming condition and the requirement of the next module.