统计制程方法在工业上的应用.ppt

統計製程方法在工業上的應用Statistical Process Methods in the Industry Applications Outlines The Meaning of Quality Quality Engineering and Management Terminology Four Major Areas in Statistical Process Methods Quality Parameters Design Quality Control and Process Monitor Process Performance Measure Product Inspection From Product Quality to TQM Expectation and QA The Meaning of Quality Eight Dimensions of Quality Performance Will the product do the intended job? Reliability How often does the product fail? Durability How long does the product last? Serviceability How easy is it to repair the product? Eight Dimensions of Quality Aesthetics What does the product look like? Features What does the product do? Perceived Quality What is the reputation of the company or its product? Conformance to standards Is the product made exactly as the designer or customer intended? The Meaning of Quality Definitions of Quality Traditional definition Quality means fitness for use Modern definition Quality is inversely proportional to variability. Quality Engineering and Management Terminology Quality Management and Engineering Terminology Quality Characteristics Physical - length, weight, voltage, viscosity Sensory - taste, appearance, color Time Orientation - reliability, durability, serviceability Quality Management and Engineering Terminology Two types of data Variables Data - continuous measurements such as length, weight. Attributes Data - discrete data, often in the form of counts. Specifications Quality characteristics being measured are often compared to standards or specifications. Nominal or Target Value (T) Upper Specification Limit (USL) Lower Specification Limit (LSL) When a component or product does not meet specifications, they are considered to be nonconforming. A nonconforming product is considered defective if it has one or more defects. Defects are nonconformities that may seriously affect the safe or effective use of the