Writing SOP's people can follow

Standard operating procedures are intended to create consistency. They define how a task is performed, establish responsibilities, provide a reference for training and support reproducible work. Yet an SOP can satisfy a documentation requirement and still fail at its primary practical purpose: helping someone perform the activity correctly.

In regulated environments, this distinction matters. A procedure may contain technically accurate information, appropriate terminology and all the expected sections, but if users cannot quickly understand what they need to do, when they need to do it, or what to do when something changes, the document is not functioning effectively.

The challenge is therefore not simply to write more comprehensive SOPs. It is to write procedures that accurately represent the process while remaining clear, usable and appropriately controlled.

Quality Systems Now focuses on helping organisations build practical quality systems and the internal capability needed to maintain them. Effective SOP writing is an important part of that capability.

Start With the Process, Not the Document

One of the most useful principles in SOP development is to understand the process before attempting to describe it.

Starting with a blank document often encourages writers to think in terms of headings, paragraphs and formal language. This can produce a document that looks like an SOP without necessarily reflecting how the work is actually performed.

Process mapping provides a different starting point.

Before writing, identify the sequence of activities, decisions, inputs, outputs, responsibilities and points where the process can change direction. A process map can expose unnecessary complexity, missing decisions and unclear handoffs before these problems become embedded in prose.

This is particularly valuable for processes involving multiple functions. When responsibility moves from one person or department to another, the procedure needs to make that transition explicit.

A clear process map therefore acts as a structural foundation for the SOP. The document becomes a description of an understood process rather than an attempt to discover the process through writing.

Write for the Person Performing the Task

An SOP is ultimately used by a person who needs to accomplish something.

That person may already be experienced, may be new to the activity, or may be consulting the document because something unusual has occurred. The procedure needs to work in all relevant circumstances.

This requires a shift away from writing primarily for document reviewers.

A procedure should answer practical questions. What happens first? Who performs the activity? What information is required? What decision must be made? What happens if the expected result is not obtained? What records must be generated?

The answers should be available where the user needs them rather than being distributed across lengthy explanatory sections.

Technical accuracy remains essential, but technical accuracy does not require unnecessary complexity. A scientifically precise instruction can often be expressed more clearly without reducing its meaning.

Plain Language Is a Quality Tool

Plain language is sometimes misunderstood as an attempt to make technical documents informal or simplistic. In a regulated environment, that is not the objective.

The objective is to reduce unnecessary linguistic complexity so that the intended meaning is easier to understand.

Long sentences can contain multiple instructions, conditions and exceptions. Passive constructions can obscure responsibility. Abstract nouns can make actions difficult to identify. Excessive terminology can increase the cognitive load placed on the reader.

Compare two approaches.

“Following completion of the applicable verification activities, consideration should be given to the documentation of any deviations identified during execution.”

This requires the reader to determine who acts, what they do and when they do it.

A clearer instruction might be:

“Document any deviation identified during verification.”

The second version is shorter, but more importantly, it identifies the action directly.

Plain language does not mean removing necessary technical terminology. Terms with specific scientific or regulatory meanings should remain precise. The goal is to remove unnecessary complexity around those terms.

Use Strong Verbs and Clear Instructions

Procedures describe actions, so action-oriented language is particularly effective.

Words such as review, record, inspect, verify, calculate, approve, notify, quarantine and release describe observable activities. They make it easier for the user to identify what is expected.

Weak constructions can make instructions unnecessarily difficult to interpret.

For example, “The batch record should be reviewed by the responsible individual” is less direct than “The responsible individual reviews the batch record.”

The difference may appear small, but a procedure containing hundreds of such constructions becomes substantially harder to scan.

Clear verbs also make responsibilities more visible. This is particularly important when several roles participate in the same process.

Separate Instructions From Explanation

Not every piece of information belongs in the same part of an SOP.

Users need to distinguish between information explaining why a process exists and information telling them what to do.

A procedure can contain background, purpose and scientific rationale where these are useful, but the operational steps should remain easy to locate.

When explanations are embedded in long instructions, users may struggle to determine which words describe mandatory actions and which provide context.

A well-structured SOP can therefore use a logical hierarchy. Purpose and scope establish boundaries. Definitions clarify terminology. Responsibilities identify ownership. The procedure describes the work. Supporting information explains relevant considerations without obscuring the operational sequence.

The exact document structure should suit the organisation and its quality system, but the underlying principle remains consistent: information should be positioned according to how the user needs to access it.

Make Decisions Explicit

Many procedures become difficult to follow because they describe actions but not decisions.

Real processes rarely consist of a simple linear sequence. A test may fail. An instrument may be unavailable. A result may fall outside an acceptance criterion. Required information may be missing. A deviation may be identified.

If the SOP only describes the expected path, users are left to determine what happens when reality differs from the ideal process.

Decision points should therefore be identified during process mapping and addressed explicitly in the procedure.

A useful procedure should make clear what condition triggers a decision, who makes the decision and what happens following each relevant outcome.

This does not mean attempting to document every imaginable scenario. Excessive branching can make an SOP difficult to use. The objective is to identify realistic and consequential variations and provide appropriate direction.

Avoid Writing the SOP Around Exceptions

There is a balance between providing sufficient guidance and creating an enormous document containing every conceivable possibility.

If every unusual event is incorporated into the main workflow, the normal process can become difficult to follow.

The primary procedure should make the standard process clear. Significant exceptions should be addressed where they affect quality, safety, compliance or the ability to complete the activity correctly.

Other events may be better managed through related procedures, deviation processes, investigation processes, forms or other controlled documentation.

This creates a more coherent documentation system and prevents individual SOPs from becoming repositories for every piece of related information.

Use Consistent Terminology

Consistency is particularly important in regulated documentation.

If the same object, activity or role is described using several different terms, users may wonder whether those terms represent different things.

Terminology should therefore be established deliberately. Where a term has a defined meaning within the organisation, that meaning should be applied consistently.

Definitions are particularly useful where abbreviations, specialised technical terms or organisation-specific language are unavoidable.

Consistency also extends to formatting, numbering, responsibilities, references to records and descriptions of actions. Users should not have to interpret changing conventions from one procedure to another.

Design SOPs for Scanning

People rarely read an SOP like a textbook.

They often consult it while performing a task, looking for a particular instruction or confirming what happens at a specific point in a process.

The visual and structural organisation of the document should accommodate this behaviour.

Short sections, meaningful headings, numbered steps, tables where appropriate and clearly identified decision points can make information easier to locate.

A procedure that requires users to read several pages of uninterrupted text before reaching an instruction is less usable than one that allows them to identify the relevant step quickly.

This does not mean reducing every SOP to a checklist. Some processes require detailed explanation. The structure should reflect the complexity and risk of the activity.

Drafting and Reviewing Are Different Activities

The person who understands a process best is not necessarily the person who can describe it most clearly.

Subject matter experts often have extensive tacit knowledge. They automatically understand assumptions that may not be obvious to someone learning the process.

This creates a common documentation problem: the expert believes the procedure is clear because the missing information exists in their own knowledge.

Review by someone who did not write the procedure can reveal these gaps.

A practical test is to ask a representative user to follow the procedure and identify where they hesitate, make assumptions or need additional clarification. Those observations provide useful evidence about whether the document communicates the intended process.

Artificial Intelligence Can Accelerate the First Draft

Artificial intelligence can be useful during SOP development, particularly when substantial source material already exists.

Process maps, technical documents, notes and other structured information can provide source material from which an initial procedure can be drafted. AI can also help identify inconsistent terminology, simplify sentences, reorganise content and suggest clearer wording.

However, generating text is not the same as validating a procedure.

AI does not possess the organisation's complete process knowledge simply because it has been given a collection of documents. It can misunderstand context, omit important conditions, introduce unsupported statements or produce wording that appears authoritative without being correct.

For regulated documentation, these limitations are significant.

AI is therefore most useful as a drafting and review aid rather than as the final authority on what a procedure should require. The process owner and appropriate subject matter experts remain responsible for determining whether the procedure accurately represents the approved process.

Human Review Remains Essential

An SOP is a controlled description of a real activity. Its accuracy cannot be established merely by checking whether the sentences are grammatically correct.

Review needs to consider scientific and technical accuracy, operational practicality, responsibilities, risks, records, interfaces with other processes and alignment with the organisation's quality system.

The reviewer should ask a fundamental question: if a competent person followed this procedure exactly as written, would they perform the intended process correctly?

If the answer is uncertain, the SOP needs further work.

This is a more useful test than simply asking whether all expected document sections have been completed.

Test the SOP Before Approval

One of the strongest ways to improve an SOP is to test it before it becomes the definitive instruction.

Give the procedure to an appropriate user and observe how they interpret it. Do not immediately explain what the writer intended. Instead, identify where the document itself fails to provide sufficient direction.

Questions can then be asked about specific points:

Can the user identify the next action?

Can they determine who is responsible?

Can they recognise when a decision is required?

Can they identify the required record?

Can they determine what to do when the expected result does not occur?

This type of usability testing can identify weaknesses that a conventional document review may miss.

A Better SOP Is Not Necessarily a Longer SOP

The objective of SOP development should not be to maximise the amount of information contained in the document.

A useful procedure contains the information necessary to perform the process correctly, consistently and in accordance with the applicable requirements.

Additional words do not automatically create additional control. In some cases, they create ambiguity.

The strongest SOPs tend to have a clear relationship between the actual process and the written procedure. The sequence makes sense, responsibilities are visible, decisions are explicit and the language does not make the user work unnecessarily hard to understand what is required.

Building the Capability to Write Better Procedures

Good SOP writing is a skill that organisations can develop internally.

Training should cover more than document templates and formatting requirements. Writers and process owners benefit from learning how to map processes, identify decision points, use plain language, distinguish instructions from background information and test procedures with actual users.

AI can support this capability by accelerating drafting and review activities, provided that its use is governed appropriately and expert judgement remains central to the final document.

The result is a more mature approach to documentation: procedures are treated as operational tools rather than simply compliance records.

For therapeutic goods manufacturers, testing laboratories and biotechnology organisations, that distinction is important. A procedure that is technically correct but routinely misunderstood can create operational variability. A procedure that accurately represents the process and communicates it clearly provides a stronger foundation for consistent execution.

Writing SOPs people can actually follow therefore begins before the first sentence is written. Understand the process, map the workflow, identify decisions and responsibilities, use clear language, structure the information around the user's needs, test the procedure and subject the final document to appropriate expert review.

The result should not simply be a better-looking SOP. It should be a procedure that people can understand, use and apply consistently when the work is being performed.