There is no reason to re-validate software provided the software or associated hardware hasn't changed. Many people apply a calendar based approach similar to equipment maintenance or IM&TE calibration. However, this is not necessary, because the software, unlike equipment, doesn't change over time. As a result, re-validation on a calendar basis should find nothing new and, therefore, doesn't add value.
Similar reasoning applies to process validation. As long as the process produces conforming product, periodic re-validation is unwarranted.
For devices, the Medical Device Quality Systems Manual from December 1996 says, "As long as the process operates in a state of control and no changes have been made to the process or output product, the process does not have to be revalidated. Whether the process is operating in a state of control is determined by analyzing day-to-day process control data and any finished device testing data for conformance with specifications and for variability." The same reasoning applies to software re-validation.
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Dan O'Leary
Swanzey NH
United States
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Original Message:
Sent: 26-Dec-2018 12:34
From: Anonymous Member
Subject: Software validation
This message was posted by a user wishing to remain anonymous
I am struggling to determine how often should software used to control analytical equipment (GC, HPLC) be revalidated. If there are no changes to the hardware or software, do we still need to revalidate? Thanks.