A facility receives customer orders 4-6 weeks in advance. The production manager faces a dilemma: Should they produce continuously to maximize equipment utilization? Or should they produce in waves matching actual demand, accepting lower utilization?
Continuous production = High equipment utilization (85-90%), but inventory builds ($500K tied up in inventory). Demand-matched production = Lower utilization (65-75%), but minimal inventory ($200K).
The choice impacts both operational metrics and cash flow.
The Utilization vs. Working Capital Trade-Off
High Utilization Approach:
- Production runs continuously (minimize changeovers)
- Equipment utilization: 85-90%
- Average inventory: $500K
- Production lead time: 2-3 weeks
- Safety stock needed: Higher (demand uncertainty)
Cost: $500K working capital tied up in inventory
Demand-Matched Approach:
- Production follows 4-week demand forecast
- Equipment utilization: 65-75%
- Average inventory: $200K
- Production lead time: 1-2 weeks
- Safety stock needed: Lower (short forecast window)
Cost: $300K working capital freed (can be redeployed)
The Decision Framework
The choice depends on:
1. Customer Demand Pattern
- Smooth demand (consistent orders): Favor continuous production
- Lumpy demand (sporadic large orders): Favor demand-matched
2. Equipment Changeover Cost
- High changeover cost (30+ minutes, expensive setup): Favor continuous production
- Low changeover cost (5-10 minutes): Favor demand-matched
3. Working Capital Constraints
- Abundant cash: Favor continuous production for utilization
- Cash-constrained: Favor demand-matched to minimize inventory
4. Sales Expectations
- Growth phase: Favor demand-matched (avoid excess inventory if demand doesn't materialize)
- Mature, stable: Favor continuous production (predictable demand justifies inventory)
The Hybrid Approach: Demand-Driven Production with Minimum Batch Sizing
Most food manufacturers benefit from a hybrid:
Month 1-2 Forecast: Use 4-week firm forecast for production planning
Production Batches: Produce in economic lot sizes (typically 1-2 weeks of demand) rather than daily changeovers
Safety Stock: Maintain 1-week safety stock for top 5 SKUs (80/20 rule)
Changeover Discipline: Schedule line changes weekly on fixed days to minimize losses
Example:
- Total forecasted demand: 100K units/month
- Economic lot: 25K units (1-week production)
- Safety stock: 15K units (top SKUs)
- Average inventory: 40K units (vs. 50K continuous, 20K demand-matched)
- Utilization: 78%
- Changeovers: Once weekly (4 total/month vs. 20 daily)
The Working Capital Impact
Hybrid approach typically delivers:
- Equipment utilization: 75-80% (acceptable productivity)
- Inventory carrying: 30-35 days (vs. 45+ days continuous, under 15 days demand-matched)
- Changeover losses: 3-5% of capacity (vs. 1-2% continuous, 8-12% daily)
For a $50M revenue facility with 30-day average inventory and $3M/month production cost:
- Inventory: $3M (vs. $3.75M continuous, $1.5M demand-matched)
- Additional working capital: $750K (continuous vs. hybrid)
The PE Perspective
PE investors evaluate working capital efficiency alongside operational metrics. A facility with 75% utilization and $3M inventory is more attractive than one with 85% utilization and $3.75M inventory.
For food manufacturing companies, production scheduling balancing utilization, changeover efficiency, and working capital requirements should target 75-80% utilization with demand-driven batching to optimize both operational and financial performance.
