Part 4A – Cleaning Validation Execution Strategy and Performance Qualification

Article Series Navigation
← Part 1: Cleaning Validation in Pharmaceutical Manufacturing: Complete Beginner’s Guide
← Part 2: Risk Assessment and Acceptance Criteria in Cleaning Validation
← Part 3: Cleaning Validation Protocol, Sampling and Analytical Methods
Current: Part 4A – Executing Cleaning Validation
Next: Part 4B – Continued Process Verification, Revalidation and Audit Readiness

Introduction
From Protocol to Execution
Cleaning Validation Execution Strategy
Pre-Execution Readiness
Cleaning Validation Runs
Performance Qualification (PQ) Runs
Execution Checklist
Roles and Responsibilities During Execution
Practical Industrial Example
Best Practices
Summary Table
Continue to Part 4B

Introduction

In Part 3, we discussed how to develop a scientifically sound Cleaning Validation Protocol, perform swab and rinse sampling, validate analytical methods, and conduct recovery studies.

The next critical phase is execution.

Even the best-designed protocol will fail if execution is inconsistent, poorly documented, or not performed according to approved procedures. Regulatory agencies such as the US FDA, EMA, MHRA, WHO-GMP, and PIC/S place significant emphasis on execution because it demonstrates whether the cleaning process is truly reproducible under routine manufacturing conditions.

Execution is more than simply cleaning equipment—it is a controlled, documented activity that proves a validated cleaning procedure consistently removes residues to predefined acceptance limits.

From Protocol to Execution

Before beginning the validation study, all prerequisites should be completed.

The execution phase confirms that:

Approved cleaning procedures are followed.
Operators are trained.
Equipment is qualified.
Analytical methods are validated.
Sampling personnel are competent.
Acceptance criteria are established.
Documentation is complete.

Cleaning validation execution should always follow the approved protocol. Any deviation must be documented, investigated, and assessed for product quality impact.

Cleaning Validation Execution Strategy

A structured execution strategy ensures consistency across validation studies.

The typical workflow includes:

Protocol Approval
        │
        ▼
Equipment Qualification Review
        │
        ▼
Operator Training Verification
        │
        ▼
Manufacture Worst-Case Product
        │
        ▼
Execute Approved Cleaning Procedure
        │
        ▼
Visual Inspection
        │
        ▼
Swab & Rinse Sampling
        │
        ▼
Laboratory Analysis
        │
        ▼
Compare Results with Acceptance Criteria
        │
        ▼
Pass / Investigate / Repeat

This systematic approach minimizes variability and ensures compliance with regulatory expectations.

Pre-Execution Readiness

Before initiating the first validation run, verify that all supporting systems are ready.

Pre-Execution Checklist

Item	Verification Required
Cleaning SOP	Approved and current
Validation Protocol	Approved by QA
Equipment Qualification	IQ/OQ/PQ completed
Calibration	Instruments within calibration due date
Analytical Methods	Validated
Sampling Materials	Available and qualified
Operators	Trained and qualified
Cleaning Agents	Approved and within expiry
Utilities	Water, compressed air, steam qualified
Documentation	Controlled copies available

Starting a validation study without confirming readiness can invalidate results and require costly repetition.

Cleaning Validation Runs

What is a Validation Run?

A validation run is one complete cycle consisting of:

Manufacturing the selected worst-case product.
Cleaning the equipment using the approved SOP.
Conducting visual inspection.
Collecting swab and/or rinse samples.
Performing laboratory analysis.
Comparing results against acceptance criteria.

The objective is to demonstrate consistent cleaning performance.

Number of Validation Runs

Industry practice and regulatory expectations generally require three consecutive successful cleaning validation runs performed under routine operating conditions.

These runs should:

Be independent.
Represent normal production.
Use the same approved cleaning procedure.
Meet all predefined acceptance criteria.

If any run fails, the cause should be investigated before additional studies are conducted.

Factors That Influence Validation Runs

The number and scope of validation runs may depend on:

Product potency
Equipment complexity
Cleaning method (manual or CIP)
Process risk assessment
Historical cleaning performance
Regulatory commitments

Manufacturers should justify their approach using documented scientific rationale.

Performance Qualification (PQ) Runs

Performance Qualification (PQ) demonstrates that the cleaning process consistently performs as intended under actual manufacturing conditions.

During PQ, the following should be evaluated:

Operator performance
Cleaning consistency
Equipment design
Cleaning time
Contact time of cleaning agents
Rinse effectiveness
Residue removal
Analytical results

PQ provides evidence that routine production cleaning can reliably achieve validated cleanliness levels.

Typical PQ Acceptance Criteria

Parameter	Acceptance Requirement
Visual Inspection	No visible residue
Swab Results	Within established limits
Rinse Results	Within established limits
Recovery Factor	Validated
Analytical Method	Meets validation requirements
Documentation	Complete and approved
Deviations	None impacting study validity

All criteria must be satisfied before PQ is considered successful.

Execution Checklist

The following checklist can be used during execution:

Activity	Status
Protocol approved	□
Equipment cleaned according to SOP	□
Cleaning agent verified	□
Visual inspection completed	□
Swab samples collected	□
Rinse samples collected (if applicable)	□
Samples labeled correctly	□
Samples submitted to QC	□
Analytical testing completed	□
Results reviewed	□
Deviations documented	□
QA review completed	□

This checklist helps ensure consistency and inspection readiness.

Roles and Responsibilities During Execution

Successful execution requires coordination across multiple departments.

Department	Responsibilities
Production	Perform cleaning according to approved SOPs
Validation	Coordinate execution, monitor compliance, collect evidence
Quality Assurance (QA)	Witness critical activities, review documentation, approve deviations
Quality Control (QC)	Analyze samples using validated methods
Engineering	Maintain equipment and utilities
Microbiology	Perform microbial testing where required

Clear communication between departments reduces execution errors and supports timely completion.

Practical Industrial Example

A pharmaceutical company manufactures several oral solid dosage products using a shared tablet compression machine.

Following the risk assessment:

A highly potent product is selected as the worst-case product.
The approved cleaning SOP is executed by trained production personnel.
QA witnesses the cleaning process.
Validation engineers collect swab samples from punches, dies, feed frame, hopper, and discharge chute.
QC performs HPLC analysis and all results meet the established acceptance criteria.
Three consecutive validation runs are successfully completed without deviations.

The validation team concludes that the cleaning procedure is reproducible and suitable for routine manufacturing.

Best Practices for Execution

✔ Execute only approved protocols.

✔ Use trained and qualified personnel.

✔ Perform validation under routine operating conditions.

✔ Follow the cleaning SOP exactly as written.

✔ Collect samples from predefined worst-case locations.

✔ Record all observations in real time.

✔ Investigate deviations immediately.

✔ Ensure QA oversight during critical activities.

✔ Maintain complete traceability for all samples and records.

Summary Table

Execution Stage	Key Objective
Protocol Approval	Ensure study is authorized
Equipment Readiness	Confirm qualification and calibration
Cleaning Execution	Follow approved SOP
Visual Inspection	Verify no visible residue
Sampling	Collect representative evidence
Laboratory Analysis	Quantify residues accurately
PQ Runs	Demonstrate reproducibility
Documentation	Create inspection-ready records

Looking Ahead

Executing a cleaning validation study is only one part of the lifecycle. To maintain compliance, manufacturers must continuously verify that the validated process remains effective throughout routine production.

In Part 4B, we’ll cover:

Cleaning Validation Report Preparation
Trending of Cleaning Validation Data
Continued Process Verification (CPV)
Revalidation Strategy
Change Control
Deviation Management
CAPA
Out-of-SSpecification (OOS) and Out-of-Trend (OOT) Handling
Annual Product Review
Audit Readiness
Practical Case Studies

These activities ensure that a validated cleaning process remains effective throughout the equipment lifecycle and continues to meet global GMP expectations.

Continue to Part 4B → Continued Process Verification, Revalidation, and Audit Readiness

Executing Cleaning Validation and Maintaining Continued Verification