Core Viewpoint - The article emphasizes the critical importance of "special characteristics" in the automotive industry, which are essential for ensuring product safety, compliance, and customer acceptance. Ignoring these characteristics can lead to severe consequences, including safety hazards, legal liabilities, and damage to brand reputation [1][2]. Group 1: Definition and Importance of Special Characteristics - "Special characteristics" refer to critical points in a product that require special attention and strict control, distinguishing them from ordinary characteristics [3][4][5]. - In the automotive industry, special characteristics are vital for safety, regulatory compliance, assembly, and functional performance, necessitating a rigorous management system [6]. Group 2: Identification of Special Characteristics - Special characteristics are identified based on two main sources: customer specifications and the manufacturer's own expertise [7][8]. - Customers, such as automakers, specify which characteristics must be controlled, often related to safety regulations and assembly requirements [7]. - Manufacturers should also proactively identify critical characteristics based on their design and manufacturing experience, even if not explicitly requested by the customer [8]. Group 3: Management of Special Characteristics - Effective management of special characteristics involves a complete chain from customer requirements to on-site control, ensuring that critical features are monitored and maintained [9][14]. - Management is divided into two levels: documentation management and on-site execution [14]. - Documentation must clearly indicate special characteristics using standardized symbols, ensuring all relevant personnel are aware of critical control points [15]. - On-site control requires continuous monitoring of special characteristics through statistical methods to ensure they remain stable and under control [16][21]. Group 4: Implementation of Management Practices - The management of special characteristics should form a closed-loop system from design to production, ensuring that customer requirements are fully integrated into the manufacturing process [17]. - The process begins with comprehensive risk analysis based on customer specifications, followed by accurate documentation and continuous monitoring during production [18][19]. - On-site personnel must be provided with clear, actionable procedures to ensure effective execution of management practices [20][22].