Although I haven’t dealt with a validation process in a work place, the process is very important in determining the effectiveness of the product. There are different types of validation methods; one type being retrospective validation. Retrospective validation is used for established processes. This form of validation cannot be used when a modification has occurred in the product. This is used when processes have not gone proper documentation for the validation process. The validation is being done based on historical data as evidence that the process has been occurring properly and efficiently. This form of validation is not as commonly used nowadays for processes. It is mainly used when there is an audit of a validated process. However, presently prospective validation is used on products when they are created, so retrospective validation is not as likely to be used.