Error-Proofing

Detection approach that prevents incorrect actions from becoming defects that reach the customer or next process. Assumes mistakes may occur but catches them immediately before consequences propagate. Examples include sensors that detect missing parts, vision systems that verify correct assembly, or alarms triggered by out-of-specification conditions. Different from mistake-proofing which prevents wrong actions from occurring. Part of poka-yoke concept. Represents the Detection level in ADP framework—stronger than administrative controls but weaker than true prevention. Used when mistake-proofing is not technically or economically feasible. Enables Jikotei Kanketsu by catching errors in-process.