Executive summary
Facing the potential loss of a critical $4.6 million annual account due to recurring quality discrepancies, our customer initiated a rigorous Impruver Storyboard engagement to restore customer confidence. By transitioning from tribal knowledge to standardized work instructions (SWI) and implementing 5S and Andon systems, the team successfully reduced quality incidents from six per month to just one. This operational turnaround not only stabilized the relationship with their customer but also positioned the company for future growth through automated mistake-proofing.
Introduction
In the high-stakes world of label manufacturing and packaging, precision is not just a metric—it is the currency of trust. For nearly 15 years, our customer has served their key customer, an account valued at approximately $4.6 million annually.
However, longevity does not guarantee immunity from operational drift. As CI leaders understand, reliance on “tribal knowledge”—unwritten information known only by a few—can create fragility in a system. When quality issues began to surface in the Shipping and Finishing departments, the team recognized that a standardized, data-driven intervention was required to protect this key account and drive operational excellence.
The Problem
Despite a long history of collaboration, the relationship with their customer became strained due to a series of quality failures. The primary friction points involved discrepancies in packing lists, incorrect purchase order (PO) information, and inaccurate liner counts on the back of labels.
The data revealed a troubling trend:
- Packing List Errors: Occurrences spiked to eight in a two-month period, totaling 13 year-to-date.
- PO Discrepancies: Three incidents recorded year-to-date where incorrect PO information appeared on the back of labels.
- Liner Count Errors: Four instances where the back liner print did not match the core tag quantity.
These were not merely administrative oversights; they caused significant operational pain for the client. Their customer was forced to implement redundant checks on their inbound logistics to catch these errors, creating friction and discontent. The root cause analysis revealed a lack of clear communication, an absence of standard processes, and inconsistent follow-up on Corrective and Preventive Actions (CAPA). The risk was clear: if the packing slip discrepancies and quality control lapses continued, their customer would seek a new vendor.
The Solution
To address these challenges, the team utilized the Impruver Storyboard framework, ensuring a structured approach to Plan-Do-Check-Act (PDCA). The solution was deployed in two phases: immediate containment (Interim) and systemic correction (Long-term).
Phase 1: Containment and Standardization (Interim)
The immediate goal was to stop the “bleeding” and prevent defects from leaving the facility.
- Multi-Check Implementation: A rigorous secondary and tertiary sign-off process was instituted involving the Rewind, Quality Control (QC), and Shipping teams. This forced collaboration ensured that defects were captured before shipment.
- 5S Deployment: To address logistics errors, the Shipping team utilized 5S methodologies to designate specific locations for FedEx pickups, ensuring drivers and employees always knew where packages were staged.
- FMEA Analysis: The team conducted a Failure Mode and Effects Analysis (FMEA), identifying 24 current failure modes across the Rewind, Pack, and Ship value stream.
Phase 2: Automation and Engineering (Target Condition)
Recognizing that human inspection is not 100% reliable, the team moved toward engineered Poka-Yoke (mistake-proofing) solutions.
- PLC Integration: To solve the “missing back print” issue, the team integrated a Programmable Logic Controller (PLC) to the machine. This Andon-style system alerts operators immediately when a print error occurs, removing the reliance on human vigilance.
- AI Implementation: The team began vetting Keyence AI systems for the Rewind, Pack/Ship, and QA teams. The objective is to record counts at each step and automate the generation of core and carton labels, aiming for a “Perfect Packing Slip” without human intervention.
Result
The application of Lean principles produced immediate, quantifiable business impacts. By shifting from reactive firefighting to proactive process control, our customer achieved the following:
- Drastic Reduction in Defects: The number of quality cases dropped from a high of 6 per month to just 1 per month, meeting the target condition for stabilization.
- Enhanced Visibility: The implementation of 5S and standardized work instructions eliminated the reliance on tribal knowledge, allowing any operator to perform the task correctly.
- Customer Retention: The rapid improvement in quality metrics preserved the $4.6 million annual revenue stream.
- New Opportunities: By demonstrating the ability to document, handle, and resolve issues systematically, the team opened the door for growth, including potential new flex pouch work with the client.
Conclusion
The turnaround of our customer’s key account serves as a testament to the power of structured Continuous Improvement. By leveraging tools like the Impruver Storyboard, A3, FMEA, and 5S, the team did more than just fix a packing list error; they transformed their culture from one of tribal knowledge to one of operational excellence.
The journey continues as the facility moves toward full automation and AI integration, ensuring that quality is engineered into the product rather than inspected into it. For leaders in the manufacturing space, this case reinforces a critical lesson: robust CI frameworks are not just about efficiency—they are the ultimate safeguard for customer retention and revenue protection.
To learn how you can certify your team in these methodologies and drive similar results, explore our resources on Lean Six Sigma implementation.
