A barrier is any action or process built into the work flow to check for accuracy or quality and that may prevent an incident.Example: On completing a quality control check list prior to the start of the shift, the tech notices that an expired reagent was placed into use for that day's testing.
A driver and passenger approach a washed out portion of the road. There is a flashing road block. The driver sees it and steers the car to safety.The roadblock is the barrier that facilitates a planned recovery.
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