Since 2001, W3C has a QA activity with
a Working group and an Interest group.
  - Familiar reasons:
    
      - Better, more testable specifications
 
      - More interoperable implementations
 
    
   
  - Good business sense:
    
      - Cost of RECs (example SVG 1.0: $2M USD)
 
      - Test materials reduces the REC development
      costs