Validating that vulnerabilities have been remediated can be performed using a variety of methods, either in-house or through external independent verification testing. Some organizations prefer to track remediation in-house and possess the resources to independently validate successful remediation, however most seek independent validation and should have a remediation verification test performed. This is why it is critical that a penetration test be performed in a repeatable manner. Of equal importance is that the individual validating remediation is not the same individual that performed the remediation. Checking one’s own work is not as reliable as having an independent individual check that person’s work.