Documentation for Control of Appearance Aesthetic Quality; Color and Gloss
|Publication Date:||1 May 2008|
This procedure shall be followed to allow for a part manufacturer's ongoing control of appearance quality for production parts. Appearance quality pertains to aesthetic properties, specifically color and gloss for this document, to ensure harmony coordination (for interior trim components) as originally approved by the Appearance Approval Report (AAR). The concept of quality control (QC) for aesthetic properties is relevant to exterior trim as well as interior trim. This specification's primary focus is for low gloss interior trim. This procedure defines the instrumented measurement criteria and documentation as well as a procedure for working standards, required for a supplier of appearance parts to control appearance aesthetic quality.
The following functional areas support this procedure:
• GM Design Appearance Quality
• Supplier of the production part
• GM Supplier Quality groups
GM continues to specify color and gloss via a visual match to the appropriate master (such as the Primary Color Master, Primary Gloss Master, PPAP Master or Apparent Color and Gloss Master Plaque, i.e., WPPGLG or WPEPGLD for interiors) as documented on the Appearance Requirements Drawing (ARD) referenced in the part math data file (or drawing). Visual evaluation remains the primary requirement for match to requirements into GM.
Visual requirements are used to ensure color harmony across various parts manufactured from different materials and processes where part differences may negatively affect instrument performance.