Case Study: Unlocking Manufacturing Capacity Through Lean SMED Transformation

The Challenge: The Cost of Inconsistency

A leading regional plastic packaging manufacturer, operating across multiple specialized production sections with over 160 machines, faced a critical bottleneck. With a diverse portfolio of 100+ SKUs—ranging from 5ml precision bottles to 200L industrial drums—the facility struggled with non-standardized mold changeover processes.

The lack of a measured baseline meant that changeover durations were highly dependent on individual operator experience and preparation levels. This inconsistency led to:

• Significant cumulative machine downtime.
• Reduced overall plant productivity and capacity.
• Scheduling challenges and potential delivery delays for key customers.
• Increased operational costs due to inefficient labor and equipment utilization.

The Strategy: Lean Six Sigma & SMED Implementation

To address these inefficiencies, the organization launched a structured Single Minute Exchange of Die (SMED) project. The strategic objective was to transform “Internal” activities (tasks done while the machine is stopped) into “External” activities (tasks prepared while the machine is still running).

The project team, a cross-functional group of production, workshop, and quality leaders, defined the changeover window strictly as “last okay piece to first okay piece”.

Key Implementation Pillars:

• Data-Driven Stratification: Categorizing products into “Runners” (daily production) and “Strangers” (occasional) to prioritize high-impact improvements.
• Standardized Workflows: Developing rigorous SOPs and tool-preparation checklists to ensure “External” activities—such as mold cleaning, tool staging, and material verification—were completed before the machine stopped.
• Skill Readiness: Implementing a comprehensive training and audit plan to ensure every shift followed the optimized protocol.

 

The Results: Radical Efficiency Gains

By applying Lean Six Sigma methodologies, the project established aggressive new benchmarks to reclaim lost production time:

• Medium Molds: Targeted reduction from a 120-minute baseline to under 45 minutes.
• Small Molds: Optimized to reach a target of less than 30 minutes.
• Big Molds: Standardized to a 120-minute maximum, ensuring predictability for large-scale industrial components.

ROI Without CAPEX

This SMED transformation delivered more than just faster changeovers; it provided a strategic roadmap for scalable growth:

1. Increased Capacity: By reducing downtime, the organization “unlocked” additional production hours, increasing total output without requiring new capital investment in machinery.
2. Operational Agility: Faster changeovers allow for smaller batch sizes and more responsive scheduling, directly enhancing on-time delivery performance for customers.
3. Cost Optimization: Reduced idle time and optimized manpower allocation led to a measurable decrease in labor costs per unit.
4. Sustained Excellence: Through horizontal deployment, these best practices are being replicated across all production lines to ensure a culture of continuous improvement.

Are you looking to liberate hidden capacity in your production lines? Standardization isn’t just about speed—it’s about predictable, scalable profitability.