CTE 4443 Final Exam Study guide Exam is in room SAN 108 Wednesday April 30th 7 30 9 30 Textile Quality Assurance The process of designing producing evaluating and assessing products to determine that they meet the desired equity level for a company s target market Many perceive quality assurance as quality control which is a post production approach testing after the product is made 1 Holistic perspective Quality is not the same for all things but is inherent in all objects and actions that which belongs to something and makes or helps to make it what it is Must address contemporary business issues In the case of textile products includes the components that contribute to quality Engineering quality into a product Measuring a product s quality Improving quality of a product or process 2 Product perspective Product quality is represented by a total of a set of precise and measurable characteristics or components of a finished product Consistent conformance to specifications and standards Quality is achieved when products consistently fall within a range of acceptable measures for Products that meet this level of quality are assumed to produce the greatest income and profit all dimensions of quality for the company 3 Customer Perspective Customer could be the next level of manufacture of the final consumer Quality reflects an ever changing marketplace and satisfies the ever changing needs of the customer in the market Companies must respond to changes in expectations and needs by maintaining contact with their customers Textile Testing One way to be sure quality is the best is through textile testing Testing is the analysis and evaluation of a material or product to assess its characteristics quality or performance The product may be tested in its original condition or may be subjected to procedures such as laundry abrasion etc before and or after testing Purposes for Testing Assessment of Product Performance Research and Development Quality Control Comparative Testing Analyze Product Failure Meet Government Regulations Who Does the Testing Suppliers the company that supplies the product to the retailer In house the company that produces the product and products for other companies Independent or contract a separate business organization that specifically tests materials Textile Testing Organizations AATCC American Association of Textile Chemists and Colorists Chemical properties of textiles ASTM American Society for Testing and Materials Physical mechanical properties ISO International Organization for Standardization Based in Geneva Switzerland Serves member organizations throughout the world Has a member from each country the member from the US is ANSI see next slide The ISO coordinates efforts among different countries to develop standard test methods that can be applied internationally American Society for Quality ASQ Organization of professionals who work to improve the quality of manufactured goods services and related factors Developed code of ethics publishes a newsletter ON Q that includes articles related to quality AAFA American Apparel and Footwear Association National organization that deals with issues of interest to the sewn products industry As the national trade association representing apparel footwear sewn products companies and their suppliers AAFA promotes and seeks to enhance members companies competitiveness productivity and profitability in the global marketplace ANSI American National Standards Institute represents the US member body in the ISO The purpose of ANSI is to coordinate voluntary standards development and use in the US and to serve as liaison between US standards organizations and other countries Testing textile materials Textile materials can be tested in the laboratory or by wear testing Laboratory Evaluating characteristics or performance of materials using standard procedures in a specialized facility Advantages Quick results Environment is controlled Uses specialized equipment Uses trained specialists Disadvantages May not be true to actual conditions of use Advantages More realistic Simulates actual use Disadvantages Long term commitment Wear testing is conducted over a long period of time and simulates actual use Textiles are determined to be of good quality if they satisfy end use performance requirements This means that the fabric as a whole from fiber to finish color must be suitable for the purpose The sheet you have comes from the ASTM specification manual These are very general and may differ from the specifications required by your organization Expensive Conditions not controlled End Use Performance Performance Specifications Standard Testing Conditions 70 2o F 21 1oC 65 2 RH relative humidity Quality A definition Complex to define Companies and their employees need to understand how quality affects organizations standard practices within organizations consumer behavior and market competition Standards Standardization Standard A set of characteristics or procedures that provide a basis for resource and production decisions Something that is established by authority custom or general consent Specification A precise statement of a set of requirements to be satisfied by a material product system or service that indicates the procedures for determining whether each of the requirements is satisfied Performance Specifications The statement of how a textile must perform in a particular end use Each end use has a different performance specification sheet Be sure to use the one for your end use Part of the sheet Characteristics what you are measuring Ex Breaking strength dimensional change Requirements expected performance level Should not be too low which will result in poor quality or too high which might cause most products to fail thus limiting product availability Anatomy of a Test Method Test Name and Number Scope and Purpose Definition of Terms Safety Precautions Apparatus and Materials Procedure Evaluation and calculation of results Report Precision and bias Notes Why Use Standard Test Methods To insure reliability For reproducibility For accuracy Sampling The sampling method will depend on The degree of accuracy required Standard Test Methods Widely accepted test method performed under controlled conditions Criteria for standard test method 1 Simplicity easy to read and understand 2 Reproducibility reproducible with respect to user time and location 3 Validity duplicates or simulates actual end use situation The manufacture of