1. Pharmaceutical Quality Control & current Good Manufacturing Practice
PHT 436
Lecture 10

2. Validation

3. Validation
it is the documented act of demonstrating that a procedure, process, and activity will consistently lead to the expected results.
It often includes the qualification of systems and equipment.
It is a requirement for GMP and other regulatory requirements.

4. The field of validation is divided into a number of subsections including the following:
Process Validation
Analytical Method Validation
Computer System Validation
Cleaning Validation

5. Design qualification (DQ) Component qualification (CQ)
Similarly, the activity of qualifying systems and equipment (elements of validation) is divided into a number of subsections including the following:
Design qualification (DQ)
Component qualification (CQ)
Installation qualification (IQ)
Operational qualification (OQ)
Performance qualification (PQ)

6. The pharmaceutical industries are concerned about validation because of the following reasons:
Assurance of quality
Cost reduction
Government regulation

7. The validation working party would usually include the following staff members, preferably those with a good insight into the company's operation:
Production Manager :
Responsible for manufacturing of batches and review of protocol and report.
Manager QC :
Responsible   for   analysis   of   samples collected
Executive QC:
Responsible for samples collection and submission to QC
Manager Maintenance:
Providing     utilities     and     engineering support
Executive Production :
Responsible for preparation of protocol and manufacturing of validation batches
Head of quality assurance :
Responsible   for   protocol   authorization and preparation of summary report.

8. Process Validation:
Process validation is defined as the collection and evaluation of data, from the process design stage throughout production, which establishes scientific evidence that a process is capable of consistently delivering quality products.
Process validation is a requirement of CGMPs for finished pharmaceuticals and of the GMP regulations for medical devices and therefore applies to the manufacture of both drug products and medical devices.
Process validation involves a series of activities taking place over the lifecycle of the product and process.

9. The FDA has proposed guidelines with the following definition for process validation: - “PROCESS VALIDATION” is establishing documented evidence which provides a high degree of assurance that a specific process consistently produces a product meeting its predetermined specifications and quality attributes”

10. The Process validation activities can be described in three stages:
Stage 1 – Process Design: The commercial process is defined during this stage based on 100 knowledge gained through development and scale-up activities.
Stage 2 – Process Qualification: During this stage, the process design is confirmed as 103 being capable of reproducible commercial manufacturing.
Stage 3 – Continued Process Verification: Ongoing assurance is gained during routine production that the process remains in a state of control.

11. Types Of Process Validation :
The guidelines on general principles of process validation mentions four types of validation:
A) Prospective validation (or premarket validation)
B) Retrospective validation
C) Concurrent validation
D) Revalidation

12. A) Prospective validation:
Establishing documented evidence prior to process implementation that a system does what it proposed to do based on preplanned protocols.
This approach to validation is normally undertaken whenever the process for a new formula (or within a new facility) must be validated before routine pharmaceutical production commences.
In fact, validation of a process by this approach often leads to transfer of the manufacturing process from the development function to production.

13. B) Retrospective validation:
Retrospective validation is used for facilities, processes, and process controls in operation use that have not undergone a formally documented validation process.
Validation of these facilities, processes, and process controls is possible using historical data to provide the necessary documentary evidence that the process is doing what it is believed to do.
Therefore, this type of validation is only acceptable for well-established processes and will be inappropriate where there have been recent changes in the composition of product, operating processes, or equipment.
This approach is rarely been used today because it’s very unlikely that any existing product hasn’t been subjected to the Prospective validation process.
It is used only for the audit of a validated process.

14. C) Concurrent validation:
Concurrent validation is used for establishing documented evidence that a facility and processes do what they purport to do, based on information generated during actual imputation of the process.
This approach involves monitoring of critical processing steps and end product testing of current production, to show that the manufacturing process is in a state of control.

15. D) Revalidation:
It means repeating the original validation effort or any part of it, and includes investigative review of existing performance data.
This approach is essential to maintain the validated status of the plant, equipment, manufacturing processes and computer systems.
Possible reasons for starting the revalidation process include:
The transfer of a product from one plant to another.
Changes to the product, the plant, the manufacturing process, the cleaning process, or other changes that could affect product quality.
The necessity of periodic checking of the validation results.
Significant (usually order of magnitude) increase or decrease in batch size.
Sequential batches that fail to meet product and process specifications.
The scope of revalidation procedures depends on the extent of the changes and the effect upon the product.

16. Phases Of Process Validation:
Phase 1: Pre-Validation Phase or the Qualification Phase.
Phase 2: Process Validation Phase (Process Qualification phase).
Phase 3: Validation Maintenance Phase.

17. Phase 1: Pre-Validation Phase or the Qualification Phase
It covers all activities relating to product research and development, formulation, pilot batch studies, scale-up studies, transfer of technology to commercial scale batches, establishing stability conditions, storage and handling of in-process and finished dosage forms, equipment qualification, installation qualification, master production documents, operational qualification, process capability.

18. Phase 2: Process Validation Phase (Process Qualification phase)
It designed to verify that all established limits of the critical process parameters are valid and that satisfactory products can be produced even under the “worst case” conditions.

19. Phase 3: Validation Maintenance Phase
Phase 3 requiring frequent review of all process related documents, including validation audit reports to assure that there have been no changes, deviations, failures, modifications to the production process, and that all SOPs have been followed, including Change Control procedures.
At this stage the validation team also assures that there have been no changes/ deviations that should have resulted in requalification and revalidation.

20. Standard operation procedure (SOP)
A SOP contains instructions having the force of a directive, covering those features of operations that lend themselves to a definite or standardized procedure without loss of effectiveness.
Standard Operating/Operation Policies and Procedures can be effective catalysts to drive performance improvement and improving organizational and operational results.
They assure that processes and manufacture will be done in a similar way and lead always to the expected quality of product.
SOPs must be followed by operators performing the manufacture and the testing of drugs.

21. The presence of these quality documents is essential when regulatory inspections (e.g. FDA) take place since the most frequent reported deficiencies during inspections are the lack of written SOPs and/or the failure to adhere to them.
The risk of GMP non-compliance is high at organizations with a poor availability of specific SOPs and also if at all they are available the staff or the people for whom they were written are not either following them.
It therefore becomes very important for the personnel to be trained on these SOPs so that they are actually aware of why and how SOPs can play important role in fulfilling the specific regulatory requirements from WHO, FDA, or other national health authorities.

22. A minimum set of Standard Operation / Operating Procedure should be available in GMP manufacturing areas for the following systems:
SOP for quality management
SOP for deviation and change control
SOP for training and organization
SOP for complaints
SOP for Recalls
SOP for preventive maintenance
SOP for the release of raw materials and finished goods
SOP for out of specification results
SOP for environmental monitoring
SOP for material management and goods receipt
SOP for pest control

23. SOP for QC testing
SOP for in process control IPC testing
SOP for document management
SOP for the creation of SOPs
SOP for corrective and preventive actions
SOP for format and content of batch records
SOP for qualification and validation
SOP for setting up product specifications
SOP for supplier qualification
SOP for internal audit or the self inspection program
SOP for lot numbering process