Process Validation is divided into three stages, So let us check it out one by one. Following are the three stages.
Stage I - Process Design: With the knowledge of Scale up studies and the prior knowledge which is gained through development, The commercial manufacturing process is defined during this stage of process design.
Stage II - Process Qualification: After defining process design, it is evaluated in this stage to determine whether the process is capable of reproducible commercial manufacturing or not.
Stage III - Continued process Verification: Continuous assurance of the ongoing process during the routine production to check the process remains in a state of control.