IPC/WHMA-A-620 is the globally recognized, industry-consensus standard that specifies requirements and acceptance criteria for cable and wire harness assemblies. Its purpose is to provide a common language and set quality benchmarks to ensure consistency, reliability, and clear communication between manufacturers and customers across various industries.

The primary purpose of the standard is to establish universal guidelines for the manufacturing and inspection of cable and wire harness products. Key objectives include:

• Standardized Quality: Defining what constitutes acceptable and unacceptable workmanship for cable and wire assemblies to promote uniform quality globally.
• Common Language: Creating a shared terminology and visual criteria (through detailed graphics) that reduces misunderstandings between original equipment manufacturers (OEMs), suppliers, and quality inspectors.
• Enhanced Reliability: Providing criteria and best practices for materials, methods, and testing that help ensure products perform as expected and have a consistent, reliable lifespan.
• Compliance and Trust: Facilitating regulatory compliance and building customer confidence by demonstrating a commitment to an internationally recognized quality standard, which is often a prerequisite for high-reliability industries.

The standard is used as a comprehensive reference manual for personnel involved in the design, manufacture, use, and installation of cable/wire harness assemblies. Its application involves:

• Determining Acceptance Criteria: Manufacturing and quality control personnel use the standard's detailed descriptions and visual examples to assess if products meet quality requirements (either passing as acceptable or failing as a reject).
• Process Control: Manufacturers implement the standard's guidelines for process control methodologies to ensure consistent quality levels during production, reducing errors and the need for rework.
• Training and Certification: Companies use the IPC/WHMA-A-620 as the basis for training and certifying their employees (operators, inspectors, and trainers), ensuring that the workforce possesses the accurate skills and knowledge of industry best practices.
• Product Classification: The standard classifies assemblies into three classes based on their intended application and required reliability level:
  • Class 1 – General Products: For consumer items where basic function is sufficient (e.g., toys, simple electronics).
  • Class 2 – Dedicated Service Products: For products requiring extended performance and longer life, where uninterrupted service is desired but not critical (e.g., computers, communication devices).
  • Class 3 – High-Performance Products: For critical-use equipment in harsh environments where performance-on-demand is essential and downtime cannot be tolerated (e.g., medical life support systems, aerospace and military applications).
• Industry Application: Engineers and sourcing managers in various sectors, including automotive, aerospace, medical, and industrial automation, rely on this standard to define quality expectations for their suppliers and products.