Product & Process Control

Process ControlIntroduction

Let’s assume that you’ve just designed, verified and validated your own new product and now it’s time to move into full production.

As a Certified Quality Engineer, your job now is to ensure that the critical quality characteristics you defined in the design phase remain in a validated state of control.

You are also responsible for controlling other critical items such as the product design, the process associated with your product, or the process associated with your service, your raw material, your non-conforming materials, etc.

As you study to become a CQE, you’ll learn there are a number of key tools & methods that you will need to utilize to successfully keep your product or process in control.

Based on the latest Body of Knowledge, there are 5 key areas associated with the Product & Process (P&P) Control pillar of knowledge.

Product & Process Control Tools


Material Control

Key Terms & Topics:
  • Material Disposition
  • Material Traceability
  • Material Design Change
  • Material Segregation
  • Classification of Non-Conformances
  • Material Review Board


Acceptance Sampling

Key Terms & Topics:
  • The Pro’s, Con’s & Generally Accepted Practices associated with Acceptance Sampling
  • How to Pick an Acceptance Sampling Plans
  • Creating and Interpreting OC Curves
  • A list of Definitions, Etc
  • Acceptance Sampling Standards


Measurement Systems

Key Terms & Topics:
  • Measurement Systems Overview & Terms
  • Repeatability & Reproducibility (R&R)
    • R&R Versus Accuracy
    • Repeatability versus Reproducibility
    • Gauge R&R Study
  • Measurement Tools
    • Linear Measurement Tools
  • Destructive & Non-Destructive Testing
  • Measurement System Analysis



Key Terms & Topics:
  • Metrology (Calibration) Overview & Concepts
  • Calibration Standards & Traceability
  • Measurement Error
  • Controls of Measurement Equipment
  • Calibration Intervals


By combining all these tools & techniques, you’ll be able to apply an adequate level of control to your product/process.  As a result, you’ll ensure that your customers are satisfied and that your product has a high quality level.

Remember, the goal here is to ensure that your final product meets your customers needs and expectations.