Running Towards World Class: 10% OEE Boost Case Study Within 80 Days with KAIZEN Institute

The Challenge of OEE Variability in Manufacturing

Operational Equipment Effectiveness (OEE) is the gold standard for measuring manufacturing efficiency, but achieving consistent and high OEE scores remains a major challenge for many industries.

One of the most significant obstacles is OEE variability, driven by micro stoppages, inefficient maintenance practices, and lack of structured problem-solving. This particular obstacle was faced by one of our clients in the Molding Industry.

Having said that, the client partnered with KAIZEN™ Institute and together we revamped a manufacturing facility to increase their Molding OEE from 62% to 72%, reduced micro stoppages by 40%, and established a world-class maintenance system that eliminated stock shortages and inefficiencies.

Identifying the Root Causes of OEE Variability

Despite having a strong production capability, the facility struggled with inconsistent performance, frequent production interruptions, and inefficient maintenance processes. A deep-dive analysis revealed several critical issues:

1. High OEE Variability Due to Micro Stoppages
   – Frequent small equipment stoppages disrupted workflow and compounded over time, leading to significant production losses.
   – A lack of structured daily control and real-time countermeasures meant that issues persisted without effective resolution.
   – Operators and maintenance teams lacked a systematic approach to analyzing stoppage patterns and tackling them at the root cause level.
2. Inefficient Maintenance Warehouse Management
   – The plant operated with three separate maintenance warehouses, causing excessive time loss searching for parts and unnecessary movement between locations.
   – There was no stock control for consumables and spare parts, leading to frequent shortages and delays in critical maintenance activities.
   – Poorly organized inventory resulted in increased downtime and inefficiencies across maintenance operations.
3. Lack of Structured Maintenance Planning
   – The annual maintenance stoppage was poorly planned, leading to incomplete work execution and uncoordinated maintenance activities.
   – A reactive “firefighting” approach dominated the maintenance culture, leaving little room for focused problem-solving and preventive measures.
   – There was no statistical approach to identifying recurring issues and prioritizing interventions effectively.

KAIZEN™ Approach: A Data-Driven, Structured Solution

To eliminate these inefficiencies and stabilize OEE performance, KAIZEN™ Institute implemented a multi-faceted approach, addressing both operational and cultural challenges within the organization.

1. Centralizing and Optimizing the Maintenance Warehouse

A disorganized maintenance inventory system often leads to prolonged downtime. To eliminate inefficiencies, the maintenance warehouse was centralized and optimized:

• One Unified Maintenance Warehouse: Consolidating three warehouses into one streamlined the storage and retrieval process, significantly reducing search time.
• Inventory Standardization & Stock Control System: A structured stock control system was implemented to ensure real-time tracking of consumables and spares, preventing shortages and excess inventory.
• Reduction in Unnecessary Movements: Standardized warehouse layout and optimized part placement minimized unnecessary movements, allowing technicians to retrieve required parts swiftly.
• 100% Availability of Critical Spares: Improved stock management ensured essential maintenance components were always on hand, preventing unexpected stoppages due to missing parts.

2. Kobetsu Kaizen: Eliminating Micro Stoppages Through Focused Improvement

Micro stoppages—frequent, short-duration interruptions—are one of the biggest hidden OEE killers. A structured Kobetsu Kaizen (Focused Improvement) approach was applied:

• Data-Driven Analysis of Stoppages: A systematic review of downtime patterns helped pinpoint the most recurring and disruptive stoppages.
• Targeted Countermeasures for High-Impact Issues: Specific chronic equipment stoppages were addressed through focused interventions, reducing micro stoppages by 40%.
• Empowering Teams for Sustainable Gains: Cross-functional teams were trained to sustain improvements and prevent recurrence through effective countermeasure implementation.

3. Implementing Autonomous Maintenance (AM) for Operator-Driven Reliability

Operators are the first line of defense against equipment deterioration. By embedding Autonomous Maintenance (AM) practices, production teams were empowered to take greater ownership of equipment reliability:

• Operator Training in Basic Maintenance: Routine lubrication, cleaning, and inspection tasks were handed over to production teams to prevent minor stoppages.
• Shift from Reactive to Proactive Maintenance: AM reduced the need for maintenance personnel to address routine issues, allowing them to focus on more complex and preventive tasks.
• Collaborative Maintenance Culture: Production and maintenance teams worked together to sustain optimal equipment conditions, increasing uptime and reducing unplanned breakdowns.

4. Daily Kaizen in Maintenance: Embedding Continuous Improvement

A major shift from firefighting to structured problem-solving was necessary to sustain improvements. A Daily Kaizen approach was introduced:

• Daily Problem-Solving Meetings: Maintenance and production teams met daily to review OEE data, discuss emerging issues, and implement immediate corrective actions.
• Structured Root Cause Analysis (RCA): Systematic problem-solving techniques (5-Why, Fishbone Analysis) were applied to address the underlying causes of recurring issues.
• Real-Time OEE Monitoring: Continuous tracking of OEE trends enabled teams to proactively adjust processes, improving overall equipment efficiency.

5. Proactive Planning for the Annual Maintenance Shutdown

The annual maintenance shutdown is a critical opportunity to ensure long-term operational stability. Poor planning had previously led to incomplete execution of necessary tasks. KAIZEN™ Institute facilitated a structured approach to shutdown planning:

• Comprehensive Pre-Planning of Maintenance Tasks: Every maintenance activity was scheduled well in advance, ensuring thorough execution.
• Material Preparation & Logistics Optimization: Necessary spare parts and consumables were pre-ordered and staged to prevent last-minute disruptions.
• Adherence to Planned Maintenance Scope: Unlike previous years, where certain tasks were deprioritized or missed, all scheduled activities were successfully completed, ensuring optimal equipment performance post-shutdown.

Tangible Benefits Achieved

Following the implementation of these structured interventions, the facility achieved significant and measurable improvements:

• OEE increased from 62% to 72%, stabilizing production efficiency.
• 40% reduction in micro stoppages, minimizing workflow interruptions.
• Zero stock shortages for critical maintenance spares and consumables.
• Annual maintenance shutdown executed fully as planned, maximizing equipment reliability.
• Shift from reactive firefighting to structured, data-driven problem-solving, enhancing long-term efficiency.

KAIZEN™ is the Leader in OEE Improvement

This case study highlights how structured, data-driven OEE improvement strategies can drive sustainable manufacturing excellence. KAIZEN™ Institute’s expertise in Lean methodologies, Total Productive Maintenance (TPM), and data-driven problem-solving ensures that manufacturing operations achieve:

• Higher OEE with stable production output
• Elimination of micro stoppages and unplanned downtime
• A proactive and engaged workforce that owns process improvement
• Improved maintenance efficiency through best-in-class practices

By applying structured Lean methodologies and fostering a culture of daily continuous improvement, organizations can achieve sustained operational excellence and long-term profitability.