Standard Operating Procedure (SOP) for Document Numbering of Instrument Qualification Protocols

In pharmaceutical manufacturing, proper documentation control and traceability are essential for maintaining regulatory compliance. One of the most important aspects of documentation management is assigning a unique document number to each protocol used during instrument qualification.

This article explains the Standard Operating Procedure (SOP) for allocating document numbers to instrument qualification protocols, including URS, FRS, DQ, IQ, OQ, PQ, and Re-Qualification (RQ). The SOP ensures standardized documentation, easy reference, and improved traceability across departments.

1.0 Objective

The objective of this SOP is to establish a systematic procedure for allocating document protocol numbers for instrument qualification protocols in pharmaceutical facilities.

This system helps to:

• Ensure proper traceability of qualification documents
• Maintain document control and regulatory compliance
• Provide a uniform reference system across departments
• Improve document retrieval and tracking

2.0 Scope

This SOP applies to all instrument qualification protocols prepared and executed within the organization.

The document numbering system covers the following protocols:

2.1 User Requirement Specification (URS)

Defines the user requirements and expectations for the instrument before procurement or installation.

2.2 Functional Requirement Specification (FRS)

Describes the functional capabilities and technical requirements the instrument must meet.

2.3 Design Qualification (DQ)

Ensures that the instrument design meets the specified requirements.

2.4 Installation Qualification (IQ)

Verifies that the instrument is installed according to manufacturer specifications and approved design documents.

2.5 Operational Qualification (OQ)

Confirms that the instrument operates within predetermined operating ranges.

2.6 Performance Qualification (PQ)

Demonstrates that the instrument consistently performs according to process requirements under actual operating conditions.

2.7 Re-Qualification (RQ)

Performed periodically or after major changes to ensure the instrument continues to perform as intended.

3.0 Responsibility

3.1 Doing

• Quality Control (QC) Department
• Production (PR) Department

These departments are responsible for preparing and implementing instrument qualification protocols.

3.2 Checking

• Quality Assurance (QA) Department

The QA department reviews and verifies the document numbering system to ensure compliance with SOP requirements.

4.0 Accountability

The Head of the Quality Assurance Department is accountable for the proper implementation and compliance of this SOP across the organization.

5.0 Procedure

5.1 Document Protocol Numbering System

A standardized format shall be used for assigning document numbers to instrument qualification protocols.

General Format:

XYZ / XXX / YY000

Where:

• XYZ = Name or abbreviation of the pharmaceutical company
• XXX / XX = Alphabetical code representing the type of document protocol
• YY = Department code
• 000 = Sequential numerical number starting from 001

5.2 Instrument Qualification Protocol Codes

Document Protocol Number	Applicable For	Instrument Qualification Protocol Type
XYZ/URS/YY000	User Requirement Specification	URS
XYZ/FRS/YY000	Functional Requirement Specification	FRS
XYZ/DQ/YY000	Design Qualification	DQ
XYZ/IQ/YY000	Installation Qualification	IQ
XYZ/OQ/YY000	Operational Qualification	OQ
XYZ/PQ/YY000	Performance Qualification	PQ
XYZ/RQ/YY000	Re-Qualification	RQ

5.3 Department Codes

The department code included in the protocol number indicates the department responsible for the document.

• QC – Quality Control Department
• PR – Production Department

Example Document Number:

XYZ/IQ/QC001

Meaning:

• XYZ = Company Name
• IQ = Installation Qualification
• QC = Quality Control Department
• 001 = First document issued

Importance of Document Numbering in Instrument Qualification

• Improves traceability of qualification documents
• Ensures regulatory compliance with GMP guidelines
• Simplifies document retrieval and audit readiness
• Helps maintain structured documentation control
• Prevents duplication or confusion between documents