Packaging line OEE: how to measure and improve efficiency

How to calculate packaging machine OEE

OEE = Availability × Performance × Quality. Availability measures how much time the machine is actually in production versus planned time (includes breakdowns, setup, format changes). Performance measures actual speed versus maximum theoretical speed. Quality measures the percentage of conforming packs out of total produced.

Example: a thermoformer with 80% availability, 85% performance and 95% quality has OEE = 0.80 × 0.85 × 0.95 = 64.6%. An OEE of 65-75% is considered average for food packaging lines. Best-in-class exceeds 85%.

• OEE < 50%: critical level, urgent intervention needed
• OEE 50-65%: below average, wide improvement margin
• OEE 65-75%: food industry average
• OEE 75-85%: good level, optimisation possible
• OEE > 85%: best-in-class, benchmark to maintain

Main losses in packaging lines

The Six Big Losses are divided into three categories: availability losses (breakdowns, setup/format change), performance losses (micro-stoppages, reduced speed) and quality losses (start-up rejects, production rejects). In food packaging lines the most impactful losses are generally format changes and micro-stoppages from product jams.

• Breakdowns: plan preventive maintenance, MTBF > 200 hours
• Setup/format change: target < 30 minutes with SMED
• Micro-stoppages: automate product feeding
• Reduced speed: optimise cycle parameters per product
• Start-up rejects: reduce with standardised pre-heating procedures
• Production rejects: SPC on net weight and seal integrity

Typical OEE values by machine type

Manual chambers typically reach 45-60% OEE due to the human factor (operator variability, breaks, fatigue). Automatic chambers and tray sealers reach 65-80% OEE with good maintenance. In-line automatic thermoformers can exceed 85% with Industry 4.0 integration and predictive management.

• Single manual chamber: typical OEE 45-60%
• Automatic double chamber: typical OEE 60-75%
• Semi-automatic tray sealer: typical OEE 65-75%
• Automatic thermoformer: typical OEE 70-85%
• Integrated I4.0 automatic line: typical OEE 80-90%

How to improve OEE in practice

The first step is to measure: without data, improvement is impossible. Implementing a simple data collection system (even just a stoppage recording sheet) is the starting point. Identify the three biggest losses and focus on them. A 10-15% OEE improvement in 6-12 months is realistic with targeted interventions.

• Step 1: measure availability, performance and quality every day
• Step 2: identify the 3 main losses with Pareto chart
• Step 3: SMED interventions to reduce format change times
• Step 4: planned preventive maintenance (TPM)
• Step 5: operator training on anomaly management