Interview Questions.

Question 1. What Is Process Validation?

Answer :

EMA Definition: “Documented proof that the process, operated within hooked up parameters, can perform effectively and reproducibly to supply a medicinal product assembly its predetermined specs and nice attributes.”

USFDA Definition: “The series and evaluation of statistics, from the manner layout level all through Production, which establishes scientific evidence that a process is capable of continuously delivering excellent product.”

Question 2. Which Is The Latest Guidance Document For Process Validation Published By Usfda?

Answer :

Process Validation: General Principles and Practices, (posted on Jan.2011).

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Question 3. According To Regulatory Guidelines (usfda), What Are The Stages Of Process Validation?

Answer :

Process validation includes a series of activities taking area over the lifecycle of the product and manner. There are 3 degrees for manner validation sports.

Stage 1 – Process Design: The business production procedure is defined at some stage in this stage primarily based on information received via improvement and scale-up sports.

Stage 2 – Process Qualification: During this level, the method design is evaluated to determine if the process is capable of reproducible industrial production.

Stage three – Continued Process Verification: Ongoing warranty is gained throughout ordinary manufacturing that the method stays in a country of control.

Question four. How Many Batches To Be Considered For Process Validation?

Answer :

The EMA draft guideline states “not less than 3 consecutive batches”, with justification to be provided (there are a few exceptions to this announcement).

The US FDA guidance states that the number of batches should be enough to provide statistical confidence of the process. It is a subtle, but crucial distinction within the tactics.

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Question five. Explain The Strategy For Industrial Process Validation Of Solid Dosage Forms?

Answer :

The use of different lots of raw substances must be covered. I.E., energetic drug substance and main excipients.
Batches have to be run in succession and on distinct days and shifts (the latter circumstance, if suitable).
Batches must be manufactured inside the device and centers special for eventual business manufacturing.
Critical technique variables ought to be set inside their working stages and need to now not exceed their top and decrease control limits all through procedure operation. Output responses should be well inside completed product specifications.
Failure to meet the necessities of the Validation protocol with appreciate to technique input and output manipulate have to be subjected to procedure requalification.
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Question 6. What Is Validation Protocol?

Answer :

A written plan of movements declaring how procedure validation can be carried out; it's going to specify who will conduct the diverse obligations and outline testing parameters; sampling plans, testing methods and specifications; will specify product characteristics, and gadget for use. It should specify the minimal number of batches to be used for validation studies; it should specify the attractiveness standards and who will signal/approve! Disapprove the conclusions derived from this sort of medical study.

Question 7. What Should Be The Content Of Process Validation Protocol?

Answer :

General information
Objective
Background/Pre validation Activities, Summary of development and tech switch (from R&D or some other Site) sports to justify in-procedure testing and controls; any Previous validations.
List of device and their qualification status
Facilities qualification
Process go with the flow charts
Manufacturing procedure narrative
List of crucial processing parameters and essential excipients
Sampling, exams and specifications
Acceptance standards
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Question 8. In- Process Validation Studies What Should Be The Blend Sample Size?

Answer :

1x – 3x dosage unit range on case to case foundation. As consistent with USFDA guidance, sampling length can be multiplied from 1x –10 xs with adequate scientific justification.

Question 9. According To Usfda Guidance How Many Sampling Points Should Be Considered For Collecting Blend Samples?

Answer :

At least 10 sampling locations to be considered to represent potential areas of negative mixing.

In tumbling blenders (ex: V-blenders, double cones, or drum mixers), samples ought to be decided on from at the least  depths alongside the axis of blender.

At least 20 locations are advocated to effectively validate connective blenders (ex: ribbon blender).

Question 10. What Will Be The Reason Of Within Location Variance Of Blend Data?

Answer :

Inadequacy of combination mix, sampling error or agglomeration.

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Question eleven. Why Hopper Challenge Study Is Performing During Process Validation?

Answer :

To compare effect of vibrations at some point of compression on combo uniformity, hopper have a look at shall be executed.

Question 12. What Are The Critical Process Variables In Coating?

Answer :

Pan RPM, inlet & exhaust temperature, spray price, gun distance and air stress.

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Question thirteen. Why Blending Is A Critical Parameter In Tablet Manufacturing?

Answer :

Less mixing will result in non-uniform distribution of drug and terrible glide whereas greater mixing will bring about de-blending leading to non-uniform distribution of drug and growth in disintegration time.

Question 14. What Are The Critical Parameters To Be Checked During Dry Mixing?

Answer :

Mixing time and combining speed.

Question 15. What Are The Critical Parameters To Be Checked During Binder Preparation And Addition?

Answer :

Amount of binder answer and combining time.

Question 16. What The Major Variables In Tablet Compression?

Answer :

Speed of machine and hopper degree is the primary variables.

Question 17. What Is The Revalidation Criterion For Process Validation?

Answer :

Change in components, process or best of pharmaceutical components.
Change of device, addition of latest gadget and most important breakdowns/preservation, which affect the performance of system.
Major change of procedure, parameters.
Change in manufacturing web page.
On appearance of negative excellent trends.
On appearance of recent findings primarily based on current knowledge.
Batch size change.
Question 18. What Are The Benefits Of Process Validation?

Answer :

Consistent thru output.
Reduction in rejections and reworks.
Reduction in utility price.
Avoidance of capital costs.
Fewer lawsuits approximately method related failure.
Reduced testing technique and completed goods.
More fast and accurate investigations into system deviation.
More speedy and reliable begin-up of latest gadget.
Easier scale-up from improvement work.
Easier maintenance of gadget.
Improve employee attention of methods.
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Question 19. What Are The Common Variables In The Manufacturing Of Tablets?

Answer :

Particle length of the drug substance
Bulk density of drug substances/excipients
Powder load in granulator
Amount and awareness of binder
Mixer velocity & mixing timings
Granulation moisture content material
Milling conditions
Lubricant mixing instances
Tablet hardness
Coating solution spray charge
Question 20. What Is The Action Plan If A Test Failure Observed During Process Validation?

Answer :

Any check during process validation shall check out to decide the case of failure. Where the case of failure isn't always obvious, it may beneficial to us an research process to ensure that each one the feasible areas of potential failure are included. Once the case of the procedure validation failure has been identified, the failure shall classify into the following categories.

Type I: wherein the failure may be attributed to an occurrence which is not intrinsic to the method for example, an system failure uncooked material that it can be agreed to finish the validation exercise substituting every other batch for the only that failed. This research and the subsequent action will be protected within the validation report.

Type II: where the failure may be characteristic failure or in which the research is inconclusive than the validation workout has failed. In this situation the validation terms decide and justify the route of movement to be taken, recording its justification and guidelines.

This decision shall take into account:

Re-checking out - if investigation of the analytical effects supports the choice.
Introduction a trade in operation parameters, system steps.
Changing the method gadget or the technique for the use of the gadget.
Suspension of the manner validation exercising until in addition technical evaluation and/or improvement has been done.
Changing the sampling regime.
Review of historical data.
Change of the procedure validation recognition standards.
Change to an analytical manner.