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Engineering Change Request (ECR)

Quick Definition

An Engineering Change Request (ECR) is the change request listing proposed improvements or problems with components or assemblies. Generally, the ECR precedes the engineering change order (ECO). The ECR documents the reason for the change request and lists items in the bill of materials that may be impacted by the proposed change.In change management, the ERC is the first step in enacting corrective action in the manufacturing process. The document details the proposed changes and the impact of the change on the error in the product. The issuance of the ECR is a formal process of reviewing and proposing a change to a product.

What is an Engineering Change Request (ECR)?

An Engineering Change Request (ECR) is a pivotal document and process within the realm of engineering change management, sometimes referred to as an engineering change order (ECO), particularly in the context of product development and Product Lifecycle Management (PLM). Not to be confused with an engineering change notice (ECN), an ECR serves as a formalized mechanism for stakeholders to propose modifications, enhancements, or alterations to a product's design, functionality, or associated processes. ECRs play a vital role in ensuring that proposed changes are systematically evaluated, approved, and, if deemed necessary and beneficial, implemented to enhance product quality, meet regulatory requirements, address customer complaints, and adapt to evolving market demands.

Key Elements of Engineering Change Request (ECR)

  1. Description of Proposed Change: At the core of every ECR is a detailed description of the proposed change, which outlines its scope, purpose, and the specific aspects of the product design or functionality that will be affected.
  2. Bill of Materials (BOM): ECRs often entail updates to the product's BOM, specifying alterations to components, parts, or materials used in its construction.
  3. Supporting Documentation: To facilitate validation and implementation, ECRs may include supporting documents such as engineering drawings, schematics, technical specifications, or any other relevant materials. These may require processes for document changes when needed.
  4. Workflow and Routing: Many organizations leverage workflow automation systems to streamline the ECR process. This allows for the real-time tracking of the ECR's progress through approval stages and ensures that it is routed to the appropriate stakeholders for review and decision-making.
  5. Change Control Board (CCB): The CCB plays a critical role in the ECR process by assessing the feasibility and impact of proposed changes, making informed decisions, and ultimately approving or rejecting ECRs.

The ECR Process in Product Development and Manufacturing

  • Product Development: ECRs are fundamental during the development of new products. They enable design changes and improvements to be systematically integrated to meet evolving requirements or address customer complaints.
  • Supply Chain Impact: Changes to components, materials, or specifications may have implications for procurement, inventory management, and supplier relationships within the supply chain.
  • Regulatory Compliance: ECRs are vital in ensuring that products comply with stringent regulatory requirements, particularly in industries governed by strict quality and safety standards.

Quality Management and Customer Satisfaction

ECRs contribute to quality management by addressing issues raised through customer complaints and audits. They enhance product quality and functionality, ultimately leading to higher customer satisfaction. Modern quality management systems (QMS) are widely used to streamline the ECR process, given real-time access to product data, easily searchable records of product changes, and automated approval processes.

Streamlining Change Management

While ECR processes can be complex, their use of automation and structured workflows streamlines the approval and implementation of changes, reducing the potential for disruptions and errors.

Data Management and Traceability

ECRs promote effective data management by documenting proposed changes and their outcomes. This ensures traceability and facilitates historical analysis for continuous improvement.


In conclusion, an Engineering Change Request (ECR) represents a pivotal document and process that underpins effective engineering change management within product development and manufacturing. By providing a comprehensive description of proposed changes, involving supporting documentation, and adhering to a structured workflow with a Change Control Board (CCB), ECRs enable organizations to adapt to changing requirements, enhance product quality, and ensure compliance with regulatory standards. The systematic use of ECRs contributes to efficient communication and collaboration among stakeholders, prevents design errors, and promotes traceability, ultimately resulting in products that meet evolving customer needs and industry standards.