Standard Operating Procedure better known as SOP is one of the most important documents for any organization seeking quality, consistency, and safety in its processes. Whether in a pharmaceutical industry, a hospital, a clinical analysis laboratory, or an administrative department, a well-developed SOP makes the difference between operational excellence and chaos.
Standard operating procedure is, how to structure it correctly, the most common mistakes to avoid, and how to create an efficient SOP in 7 practical steps with real examples and advanced tools such as 5W2H, SIPOC, and the RACI matrix.
What is a Standard Operating Procedure (SOP)?
Simple Definition (for beginners)
A Standard Operating Procedure (SOP) is a written document that describes, step by step, how a task or process should be performed in a standardized way. It ensures that any employee regardless of experience performs the activity in the same way, with the same expected results.
In simple terms: the SOP is your company’s official “instruction manual” for each critical activity. It answers the questions: Who does it? What is done? How is it done? When is it done? And why?
Difference Between SOP, Procedure, and Work Instruction
Many professionals confuse these three documents. See the difference:
| Document | Level | Focus | Example |
|---|---|---|---|
| SOP | Operational | How to perform a specific task | Equipment cleaning SOP |
| Procedure | Tactical | Sequence of related activities | Quality control procedure |
| Work Instruction | Technical | Technical detail of an operation | Instruction for calibrating an analytical balance |
Why is SOP Essential for Quality and Safety?
Direct Benefits of Standardization
The implementation of standard operating procedures generates tangible and measurable benefits for any organization:
- Error reduction: documented processes eliminate ambiguity and minimize human errors.
- Increased productivity: employees know exactly what to do, without constant supervision.
- Faster training: new employees learn through the SOP, reducing onboarding time.
- Traceability: every execution can be audited and tracked, facilitating investigations of non-conformities.
- Operational consistency: results are always the same, regardless of who performs the task.
- Patient safety (healthcare): in healthcare environments, SOPs protect patients and professionals.
- Assured quality: foundation for certifications such as ISO 9001 and ANVISA compliance.
Compliance with ANVISA, ISO 9001, and Good Manufacturing Practices (GMP)
In Brazil, several regulations require or strongly recommend the use of SOPs:
- ANVISA RDC No. 17/2010: requires pharmaceutical industries to maintain SOPs for all production stages.
- ISO 9001:2015: requires documentation of critical processes as evidence of operational control (clause 8.1).
- Good Manufacturing Practices (GMP): SOPs are the pillar of traceability and process validation.
- Regulatory Standards (NRs): NR-1, NR-6, and others require documented procedures for workplace safety.
Companies without formal SOPs face risks of fines from ANVISA, failure in ISO audits, and legal exposure in case of accidents.
Mandatory Structure of an SOP (Complete Checklist)
Every efficient SOP must contain the following elements:
(Document Identification)
- SOP title (clear and objective)
- Document code (e.g., SOP-QA-001)
- Current version (e.g., v2.1)
- Issue date and revision date
- Author responsible for drafting
- Approval signed by the responsible manager
- Total number of pages
- Applicable department or area
Objective and Scope
The objective must be clear and measurable. Example:
“Ensure proper cleaning of production line equipment in accordance with GMP and ANVISA RDC No. 17/2010.”
The scope defines where and to whom the SOP applies.
Responsibilities Using the RACI Matrix
| RACI Role | Meaning | Example |
|---|---|---|
| R Responsible | Who executes the task | Laboratory technician |
| A Accountable | Who approves the final result | Quality coordinator |
| C Consulted | Who provides input | Internal auditor / Engineer |
| I Informed | Who is informed | Production manager |
Step-by-Step Description Using 5W2H
| Element | Question | Example |
|---|---|---|
| What | What should be done? | Clean the laboratory bench |
| Why | Why is it necessary? | Prevent cross-contamination |
| Where | Where is it performed? | Quality control lab |
| When | When should it be done? | Before each analysis and end of shift |
| Who | Who performs it? | Responsible lab technician |
| How | How is it done? | Apply disinfectant, wait 5 min, dry |
| How much | Cost/quantity? | 50 ml per m² |
Resources and Materials
- Equipment and machines
- Raw materials or reagents
- Software and systems
- Required PPE (Personal Protective Equipment)
- Reference documents
Acceptance Criteria and Non-Conformities
- Technical specifications (limits, tolerances)
- Approval/rejection criteria
- Corrective action procedures
- How to record and track deviations
Records and Evidence
Define forms, checklists, and records required for traceability.
Flowchart
A visual representation of the process improves clarity and understanding.
How to Create an SOP in 7 Steps
Step 1: Choose the right process (prioritize high-risk or high-impact tasks)
Step 2: Gather the team apply SIPOC
Step 3: Map current process (AS-IS vs TO-BE)
Step 4: Write clearly and objectively
Step 5: Validate with those who perform the task
Step 6: Approve and control versions
Step 7: Train and monitor adherence
Practical SOP Examples
Example 1: Surgical Center Cleaning SOP
- Title: Terminal Cleaning Procedure for Surgical Center
- Code: SOP-CC-012
- Version: v3.0
- Objective: Ensure complete decontamination after surgery
- PPE: Gloves, waterproof apron, N95 mask, goggles
- Acceptance: No visible residue; negative microbial culture
Example 2: Invoice Approval SOP
- Title: Supplier Invoice Approval and Posting
- Code: SOP-FIN-007
- Responsible: Financial Assistant
- Deadline: 48 hours
- Non-conformity: Block payment and notify supplier
Common SOP Mistakes
- Too long and theoretical
- No clear responsibilities
- Never updated
- Created without operator input
- Lack of training after implementation
Digital vs Printed SOP
| Criteria | Printed | Digital |
|---|---|---|
| Accessibility | Limited | Anywhere |
| Version control | Manual | Automated |
| Risk of outdated use | High | Low |
| Compliance | Acceptable | Easier |
Digital SOPs are becoming the standard, especially in regulated industries.
Frequently Asked Questions
Who creates an SOP?
Quality analysts + operational staff + manager approval.
How often to review?
Every 12–24 months or after major changes.
Can SOP be visual?
Yes, but a written version is mandatory for compliance.
What if SOP is not followed?
It must be recorded, investigated, and corrected.
Conclusion
The SOP is not just a compliance document it is a strategic management tool.
A well-designed SOP reduces errors, accelerates training, simplifies audits, and preserves organizational knowledge.
The journey to an effective SOP is built on five pillars:
- Participation
- Clarity
- Defined responsibilities
- Version control
- Training and monitoring
Start with the most critical process. Document, validate, train, and improve.
Standardization is the first step toward continuous improvement.
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