Figure 1-1 Mistake-Proofing the Design of Health Care Processes - Figure 1.1. A 3.5-inch diskette with chamfered corner Return to Document Current as of May 2007 Internet Citation: Figure 1-1: Mistake-Proofing the Design of Health Care Processes -. May 2007. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/professionals/quality-patient-safety/patient-safety-resources/resources/mistakeproof/mistakefig1-1.html