Retrospective validation is the second type of process validation, some of the points regarding the retrospective validation are given below , so let us check it out one by one:
Retrospective validation is the documented evidence in which the process validation is carried out based on the historical data.
Validation of facilities, process, or processes are carried out based on the available historical data or reports.
This type of approach is rarely used today.
This approach is not applicable if there is recent changes in the equipment, any operating processes, or change in composition of materials used.
Retrospective validation is allowed or performed when there is no alteration in the facilities, equipment, operating process or the composition of material.