What should I focus on when auditing a packaging machine factory?

• Check torque-wrench tightening per process card, key bolts marked.
• Check control cabinet wiring with ferrules and wire numbers, CE/UL compliant.
• Check no-load run: heat-seal jaw within ±2°C, stable film tension.
• Check FAT area demonstrating changeover time and cycle time data.
• Check warehouse parts segregated by machined/purchased, batch traceable.