Six React icon components visualize Statistical Process Control outcomes: Pass, Fail, and Erratic assurance states, plus High, Low, and Random variation patterns. Icons use SVG circles, letters, and D3 line paths with curveBasis to draw process trends. High and Low icons accept a performance prop for improvement or concern styling. The example renders eight icons at 200 by 200 pixels each, demonstrating reusable, parameterized icon components built with React and D3 for SVG rendering.