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Clearance in the context of quality management refers to the intentional space or gap between two parts or components, designed to ensure proper fit, function, or movement within a product. It's a critical parameter in engineering, manufacturing, and assembly processes, affecting the performance, reliability, and lifespan of the final product. Managing clearance correctly is essential for achieving desired quality standards and ensuring customer satisfaction.


In quality management, clearance is carefully calculated and controlled based on the application's specific requirements, considering factors such as material properties, operating conditions, and desired product performance. Proper clearance can help prevent issues like excessive wear, noise, and operational failure. In contrast, incorrect clearance may lead to part misalignment, overheating, or reduced efficiency, impacting the overall quality and functionality of the product.

Application Areas

Clearance is a significant consideration in various aspects of quality management, including:

  • Mechanical Design and Engineering: Designing parts and assemblies to ensure correct fit and function, considering thermal expansion, material deformation, and manufacturing tolerances.
  • Manufacturing and Assembly: Adjusting machinery and assembly processes to achieve precise clearance specifications.
  • Quality Control and Inspection: Measuring and verifying the clearance of parts during and after production to ensure compliance with design specifications.
  • Maintenance and Servicing: Assessing and adjusting clearance as part of routine maintenance to ensure ongoing product performance and safety.

Well-Known Examples

An example of clearance management in quality control can be found in the automotive industry, where the clearance between engine components, such as pistons and cylinders, is crucial for ensuring efficient engine performance and preventing overheating or excessive wear. Similarly, in bearings, proper clearance is essential to accommodate thermal expansion and ensure smooth operation.

Treatment and Risks

Incorrect clearance can lead to product failures, increased maintenance costs, and customer dissatisfaction. To mitigate these risks, organizations implement rigorous quality control measures, including precise measurement techniques, such as gauging and digital imaging, and regular monitoring of production processes. Training for design and manufacturing personnel on the importance of clearance and the methods for achieving correct specifications is also crucial.

Similar Terms or Synonyms

In the context of quality management, related terms to clearance include tolerance, fit, and gap.



Clearance in quality management is a critical design and manufacturing consideration that ensures products perform reliably and meet their intended use. By accurately managing clearance, organizations can enhance product quality, extend product life, and achieve higher levels of customer satisfaction.


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