How TEX Plastics’ 4M System Change Management Process Delivers Better Products for Customers
24 November 2025
At TEX Plastics, our 4M System Change Management process ensures every product is right the first time.
This structured approach meticulously controls any changes related to Man, Machine, Material and Method in production.
For customers, this means fewer defects and enhanced product consistency. By proactively analysing potential issues before they arise, we guarantee that every component you receive will meet your exact specifications and perform as expected.
Our 4M process also improves product reliability and performance, giving you confidence in a stable, high-quality supply chain. This commitment to rigorous quality control builds trust and strengthens our partnership, assuring you of a dependable manufacturing partner dedicated to delivering excellence on every single order.
At TEX Plastics, every product we deliver must meet exacting quality standards and be right first time. From a customer’s perspective, this means not just getting a precision-moulded component — but getting one that performs exactly as expected, every time, with no surprises.
One of the tools that helps us achieve this is our 4M System Change Management process. It’s a structured way of managing changes in production that ensures nothing is overlooked, and every variable that could affect quality is considered before it reaches the customer.
For customers, this means:
- Reduce Product Defects: By meticulously analysing any proposed change, the 4M process helps identify potential issues before they become real problems. This prevents defects from being manufactured into the product, leading to fewer returns, recalls, and customer complaints.
- Enhance Product Consistency: The system ensures that every product manufactured, even after a change, is identical to the last. Customers can have confidence that each part they receive will fit and function as expected, without unexpected variations in dimensions, colour, or material properties.
- Improve Reliability and Performance: When changes are made, they are often intended to improve efficiency or address a quality concern. The 4M process validates that these changes don't negatively impact the product's performance or long-term reliability. This ensures the product continues to perform as designed in its intended application.
- Increase Customer Trust: By demonstrating a commitment to a rigorous quality control process, TEX Plastics builds trust with its customers. The customer can be confident that their products are being handled with the utmost care and attention to detail, leading to a stronger, more stable partnership.
What is the 4M Process?
The 4M System is a structured change management process used in manufacturing to control and manage changes related to the four key elements of production: Man, Machine, Material and Method. It is a proactive approach designed to prevent errors and ensure product quality is maintained or improved whenever a change is introduced. The process entails:
Man (or Manpower)
This element focuses on changes related to the people involved in the manufacturing process. This could include changes in personnel, training, skills or responsibilities. If an employee is replaced or their role changes, the 4M system ensures the new person has the proper training and skills to maintain quality standards.
Machine
This involves changes to the equipment, tooling or machinery used in production. This could be anything from replacing an old machine with a new one, performing significant maintenance, or changing the mould or tool used to create the part. The process ensures that the machine is properly set up, calibrated and validated to produce parts that meet specifications.
Material
This element addresses changes in the raw materials or components used to manufacture the product. This could involve changing suppliers, using a different grade of plastic, or switching to a new colorant. The 4M system requires thorough testing and validation of the new material to ensure it doesn't negatively impact the final product's physical properties or appearance.
Method
This refers to changes in the manufacturing process itself, including the sequence of operations, work instructions or process parameters like temperature, pressure or cycle time. Any modification to how the product is made must be carefully documented, reviewed and validated to ensure the change leads to a consistent, high-quality outcome.
The Origins of 4M
The 4M framework originates from Japanese manufacturing quality control methods, particularly Ishikawa (fishbone) analysis and Kaizen continuous improvement. It has been widely adopted in automotive, aerospace and high-precision manufacturing to systematically manage change and maintain consistency in high-volume production environments.
It's a foundational concept in Ishikawa (fishbone) diagrams, a cause-and-effect tool used to identify the root causes of a problem. The 4Ms serve as the primary categories for potential causes of a quality issue. By systematically analysing each "M" whenever a change is proposed, manufacturers can proactively prevent problems rather than just reacting to them. This structured, preventative approach has become a cornerstone of modern quality assurance and process control in various industries, including plastics manufacturing.
By integrating the 4M process into our operations, TEX Plastics not only maintains quality control but also ensures our customers can rely on a smooth, predictable and traceable supply of components — even when production evolves or improves.