Figure 4-4 Mistake-Proofing the Design of Health Care Processes - Figure 4.4A. A table saw without SawStop Figure 4.4B. Close up photo of a blade guard SawStop is an intriguing, alternative safety device for table saws that is very effective. Workers may not even know about it until it saves their fingers. (Video of SawStop's function can be seen at http://www.mistakeproofing.com.)Return to Document Current as of May 2007 Internet Citation: Figure 4-4: 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/mistakefig4-4.html