Before revision: Validation is the process of establishing documentary evidence demonstrating that a procedure, process, or activity carried out in testing and then productionmaintains the desired level of compliance at all stages.
After revision: Validation is the process of establishing documentary evidence demonstrating that a procedure, process, or activity carried out manually or through computer system in the stages of dispensing, manufacturing, final packing, distribution and testing of intermediate stages and finished goods stages during production, testing, and their computer system operation is able to or not able to maintain the desired level of compliance at all stages.