Accelerated Product Development: Combining Lean and Six Sigma for Peak Performance by Clifford Fiore, Fast Innovation: Achieving Superior Differentiation, Speed to Market, and Increased Profitability by Michael L. George, James Works, and Kimberly Watson-Hemphill and Projects at Warp-Speed with QRPD: The Definitive Guidebook to Quality Rapid Product Development, 9th ed by Orion “Ori” Kopelman and Cinda Voegtli