A clerk was entering a sales transaction in her cash register and accidentally entered a sales representative code for a terminated employee. This error could have been detected if the system included a

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A valid code check would have caught the error because the terminated employee's code would no longer be recognized as valid by the system. A dual read check would require two separate entries of the same data and may not have caught the error. A valid character check would ensure that the characters entered match the required format, but would not catch the use of a terminated employee's code. A reasonableness test would check if the transaction amount is within a reasonable range and would not have caught the use of a terminated employee's code.

A Clerk Was Entering a Sales Transaction in Her Cash