Ensuring Every Component Meets Your Specifications — Consistently, Reliably, and Traceably

At W&S Plastics, validation is fundamental to how we deliver high‑precision, highly regulated plastic components. Our ISO 13485‑certified quality systems include comprehensive verification and validation processes that ensure every part produced — whether for medical devices, electronics, or industrial applications — meets defined specifications with repeatable accuracy.

Validation is not a single event; it is a structured lifecycle process that begins at tool approval and continues throughout the production life of your component.

What Validation Means at W&S Plastics

Validation provides objective evidence that our moulding process consistently produces parts that meet predetermined requirements. This applies to tooling, moulding parameters, equipment performance, and downstream operations. This approach is aligned with global medical device standards such as ISO 13485 and FDA‑style process validation principles (IQ/OQ/PQ).

We tailor each validation plan to the risk classification, regulatory requirements, and performance needs of your application.

Tailored Validation for Your Project

Our Services division states that once a tool is completed, we tailor a validation process to suit your needs, ranging from simple dimensional checks to full capability and mechanical performance analysis.

Depending on product complexity and compliance requirements, validation may include:

  • Dimensional verification and fit checks
  • Specification conformance reports
  • Capability studies (Cp, Cpk)
  • Mechanical testing
  • Scientific moulding studies to establish a stable, repeatable process window

Because we use scientific moulding, we do not “tinker” with settings; instead, we identify optimal parameters and adjust the tool itself when required to achieve nominal dimensions.

Our Three‑Stage Validation Framework (IQ, OQ, PQ)

Our process follows internationally recognised validation stages consistent with medical‑device best practice.

Installation Qualification (IQ)

Verifies that all tooling, equipment, and software are installed correctly and ready for operation.

We confirm:

  • Tool installation and condition
  • Calibration of equipment
  • Environmental controls
  • Initial dimensional evaluation via First Article Inspection

These steps mirror industry best practices for medical moulding IQ.

Operational Qualification (OQ)

Challenges the process to ensure parts meet specification across the full approved process window.

Our OQ includes:

  • Scientific moulding and process window generation
  • Design of Experiments (DOE) to stress the process under high/low/nominal settings
  • Capability analysis for critical parameters

This methodology aligns with FDA‑style OQ guidance, including DOE‑based evaluation of process limits.

Performance Qualification (PQ)

Verifies consistent part quality across repeated production cycles.

During PQ, we:

  • Run multiple full production lots
  • Evaluate part conformity at statistically significant sample sizes
  • Confirm Cpk typically ≥1.33 for critical dimensions
  • Freeze and document the final validated process for ongoing production

PQ outcomes become part of the Validation Master Plan (VMP), consistent with industry norms.

Continued Process Verification

Ensuring Long‑Term Stability and Drift Detection

Validation does not end after PQ. We continuously monitor every validated process to ensure it stays within defined control limits.

W&S Plastics’ Capability Verification Analysis (CVA) program ensures parts produced today match those produced immediately after validation. CVA helps detect subtle process drift that SPC alone may not identify.

If drift is detected:

  • Root cause investigation is initiated
  • Tooling adjustments or process corrections are applied
  • Customer‑specific reporting can be generated

This ensures long‑term stability and reduces variability, scrap, and risk.

Material, Metrology & Measurement System Validation

For regulated applications such as medical devices, validation also includes:

Material Validation

  • Material certification review
  • Manufacturer compliance documentation
  • Biocompatibility considerations where required (industry standard practice)

Metrology Validation

  • Gauge R&R (Repeatability and Reproducibility)
  • Measurement System Analysis (MSA)
  • First Article Inspection (FAI)
  • Use of calibrated, certified measurement instruments

Advanced industry references emphasise the importance of metrology qualification as part of OQ/PQ.

Scientific Moulding as a Foundation

Scientific moulding ensures that our machines operate using data‑driven, optimised parameters rather than operator adjustment.
This is essential for process repeatability, and W&S Plastics explicitly uses this approach in both simple and complex moulding jobs.

Scientific moulding benefits include:

  • Repeatable process performance
  • Reduced variation and scrap
  • Stability despite ambient or material variation
  • Accurate control of melt temperature, pressure, and injection profile

Documentation & Traceability

Every validation project includes:

  • Validation Protocol (Plan)
  • IQ, OQ, PQ documentation and reports
  • Calibration certificates
  • Material certifications
  • Capability study data
  • Final validated process record (“frozen process”)
  • Change control traceability

Medical‑grade production requires robust documentation, consistent with ISO 13485 and FDA guidance.

When Do You Need Full Validation?

Full IQ/OQ/PQ validation is recommended for:

  • Medical‑device components
  • High‑risk or tight‑tolerance parts
  • Multi‑cavity or multi‑material tools
  • Products exposed to regulatory audit
  • Parts requiring documented, reproducible long‑term performance

Lower‑risk commercial components may require only simplified validation — for example, dimensional verification and sample approval — a path also supported by industry frameworks.

Continuous Improvement Through Validation

W&S Plastics’ validation approach is not static.
We adapt validation depth to your requirements and continuously refine our methods as part of our ISO‑certified quality systems. This includes risk‑based thinking, process FMEAs, control plans, and structured project management.

Our commitment is simple:
Your parts must be right — first time, every time, for the entire life of the project.

Talk to Our Validation & Quality Team

If you have a new tool, a regulated product, or a process requiring re‑qualification, our validation engineers are ready to help.

Contact us for a validation consultation or to review your project’s regulatory requirements.