Standard Operating Procedures (SOPs): A Practical Guide for Medical Cannabis Manufacturing

What is an SOP?

A Standard Operating Procedure is a controlled document that defines how a recurring activity must be performed. In GMP manufacturing, SOPs provide approved instructions for processes that affect product quality, patient safety, data integrity, regulatory compliance and business continuity.

An SOP should be clear enough that trained personnel can perform the task consistently, but detailed enough to control critical steps and prevent ambiguity. It should not be a theoretical policy document. It should describe the actual approved way of working.

SOPs are supported by forms, templates, logbooks, batch records, work instructions, training records and quality system procedures. Together, these documents create the operating framework for a GMP organisation.

Why SOPs matter in medical cannabis

Medical cannabis operations can be complex because they often include agricultural inputs, biological variation, drying, extraction, formulation, packaging, laboratory testing and distribution. Without clear SOPs, operations may depend on individual experience rather than controlled procedures.

SOPs matter because they help companies demonstrate that:

• activities are performed consistently;
• critical steps are controlled;
• personnel are trained against approved instructions;
• quality decisions are made through defined processes;
• records are completed correctly;
• deviations and changes are handled consistently;
• inspection readiness is maintained.
• Batch Manufacturing Records (BMR)

In a young cannabis business, SOPs are also a scaling tool. They allow new staff, contractors, trainers and sites to follow the same system rather than relying on informal knowledge.

SOP hierarchy

A strong documentation system normally uses a hierarchy. This helps prevent SOPs from becoming too long, too generic or too repetitive.

Not every company uses the exact same names, but the principle is important: documents should have clear purpose and avoid unnecessary duplication.

SOP lifecycle

An SOP should be controlled throughout its lifecycle, from creation to retirement. The lifecycle normally includes:

• need identified;
• document owner assigned;
• draft prepared using approved template;
• technical and quality review;
• approval by authorised personnel;
• effective date assigned;
• training completed before use;
• SOP implemented;
• periodic review performed;
• revisions controlled through change control where required;
• obsolete versions archived and removed from use.

The lifecycle should prevent uncontrolled procedures from being used on the manufacturing floor. Current approved versions must be available where the work is performed.

Writing effective SOPs

Effective SOPs are practical, clear and aligned with the way the process is actually performed. They should be written for trained users, not for auditors alone. Overly complex SOPs can create non-compliance because operators cannot easily follow them.

A good SOP should include:

• purpose;
• scope;
• responsibilities;
• definitions and abbreviations where needed;
• required materials or equipment where relevant;
• step-by-step procedure;
• critical controls or acceptance criteria;
• records generated;
• references;
• revision history.

Use active language. Avoid vague instructions such as “as appropriate” unless the decision criteria are clearly defined. If a step is critical to quality, the SOP should make it unmistakable.

Roles and responsibilities

SOPs should clearly define who does what. Ambiguous responsibilities are a common cause of GMP failures, especially when tasks involve multiple departments such as Production, QA, QC, Engineering, Validation and Warehouse.

Typical SOP roles include:

• Document owner: responsible for technical content and periodic review.
• Author: drafts or updates the procedure.
• Reviewer: confirms technical accuracy and practical usability.
• QA approver: confirms compliance with the quality system.
• Trainer or supervisor: ensures personnel are trained before use.
• User: follows the SOP and reports issues or improvement needs.

Training and implementation

An SOP is not effective until the relevant people are trained and the procedure is implemented. Training should be completed before the effective date where the SOP affects GMP tasks.

Training may include:

• read-and-understand training;
• classroom training;
• practical demonstration;
• supervised execution;
• competency assessment;
• refresher training after errors or changes.

For cannabis facilities, practical training is often essential. Operators may understand the words in the SOP but still need demonstration of gowning, line clearance, cleaning, sampling, material transfer or documentation practices.

Version control and change control

SOPs must be version controlled. Personnel should not be able to accidentally use obsolete copies. Version control should include document number, version, effective date, approval status and revision history.

Some SOP changes may be simple document revisions. Others may require formal change control because they affect validated processes, critical controls, equipment use, cleanroom operation, batch records, training, regulatory commitments or product quality.

When an SOP changes, the organisation should consider whether related forms, batch records, training materials, validation documents, risk assessments and linked SOPs also need to be updated.

Periodic review

Periodic review ensures SOPs remain current, accurate and aligned with actual practice. Review frequency should be defined by the quality system and may depend on document criticality.

During review, ask:

• Does the SOP still reflect current practice?
• Have regulations or internal standards changed?
• Have deviations or CAPAs identified weaknesses?
• Are forms and references still current?
• Are responsibilities still correct?
• Is the SOP clear enough for users?
• Are there repeated training or documentation errors linked to this procedure?

Medical cannabis examples

Cleaning SOP

A cleaning SOP may define cleaning agents, equipment disassembly, contact times, residue removal, verification checks and records. For cannabis extraction or processing, residues such as oils, resins or plant material may require specific cleaning detail.

Line clearance SOP

A packaging line clearance SOP should define how previous product, labels, packaging components and documents are removed or reconciled before the next batch. This helps prevent mix-ups and labelling errors.

Environmental monitoring SOP

An EM SOP should define sample types, locations, frequencies, incubation, limits, result review and excursion handling. It should align with the contamination control strategy.

Common SOP mistakes

• Writing SOPs that do not match actual practice. This creates immediate non-compliance.
• Too much generic text. SOPs should control the actual process, not repeat broad GMP theory.
• Unclear responsibilities. Users must know who performs, checks and approves each activity.
• Poor version control. Obsolete SOPs on the floor are a serious compliance risk.
• No training before effective date. A procedure cannot be implemented if users are not trained.
• No link to forms or records. The SOP should define what evidence is generated.
• No periodic review. SOPs become outdated as processes evolve.

Best-practice recommendations

• Use a controlled SOP template.
• Write for trained users and actual operations.
• Keep SOPs clear, specific and practical.
• Separate high-level SOPs from detailed work instructions where useful.
• Define records generated by each procedure.
• Train users before the effective date.
• Remove obsolete versions from use.
• Review SOPs periodically and after relevant deviations or changes.
• Use SOP feedback from operators to improve usability.

Frequently asked questions