LabQMHub Editorial Team · ISO 15189:2022 Quality Management Series
A procedure that exists only in an experienced technologist’s head is a single staff absence away from becoming a quality gap. Documentation is what makes a laboratory’s way of working durable, transferable, and consistent — independent of any one person’s memory, tenure, or presence on a given shift.
ISO 15189:2022’s management system requirements begin here, under Clauses 8.1 through 8.3, because documentation is the connective tissue linking every other requirement covered throughout this training program into one coherent, auditable, controllable whole.
The Documentation Hierarchy: From Policy to Procedure
Laboratory documentation is typically organized in a hierarchy: a quality manual stating overarching policy and commitment, standard operating procedures detailing how specific tasks are performed, and supporting records and forms that capture evidence the procedures were actually followed. Each level serves a different purpose, and confusing them — writing policy-level generality into an SOP that needs step-by-step specificity, for example — undermines the document’s usefulness.
This hierarchy should mirror how staff actually need information: a new technologist needs a clear, specific SOP to perform a task correctly, while a director needs the quality manual to understand overarching commitments and how individual procedures fit into the larger system.
What Makes a Document Genuinely Good
A good procedure document is explicit enough to prevent ambiguity, accurate in reflecting how work is actually meant to be performed, and written at a level of detail appropriate to its intended reader — neither so vague it fails to guide action, nor so exhaustively detailed it becomes impractical to actually follow during real work.
Documents that drift out of sync with actual practice — describing a process the laboratory no longer genuinely follows — are a common and serious finding during internal audit or external assessment, and often indicate the document control process itself has broken down somewhere along the way.
Document Control: Creation, Approval, and Version Management
Every controlled document needs a defined creation and approval process — who drafts it, who reviews it for technical accuracy, who has authority to approve it for use — and a clear, unambiguous version identification system so staff can be certain they are working from the current, approved version rather than an outdated copy someone forgot to replace.
Uncontrolled copies — printed procedures pinned to a wall, or personal digital copies saved outside the controlled document system — are a persistent risk, since they can continue circulating and being followed long after the master version has been updated, creating exactly the inconsistency document control is meant to prevent.
Managing Change and Obsolescence
When a procedure changes, the laboratory needs a defined process for communicating the change to affected staff, verifying they understand it, and formally retiring the obsolete version from active use — a change that exists in the document system but has not genuinely reached the staff performing the affected task has not actually taken effect in practice.
Obsolete documents should be clearly marked and retained according to the laboratory’s record retention requirements, covered in the next course of this program, rather than simply deleted — a historical record of what procedure was in effect at a given point in time is often essential for investigating a nonconformity that occurred months or years earlier.
Frequently Asked Questions
What is the difference between a quality manual and a standard operating procedure?
A quality manual states the laboratory’s overarching policy and commitment to quality; a standard operating procedure provides step-by-step, specific instructions for performing a particular task.
Why are uncontrolled copies of procedures a risk?
They can continue being followed after the master version has been updated, creating inconsistency between what staff are actually doing and the laboratory’s current, approved procedure.
Should obsolete documents be deleted once replaced?
No — they should be clearly marked as obsolete and retained according to record retention requirements, since historical versions are often needed to investigate past events or nonconformities.
Key Takeaways
- Documentation makes a laboratory’s way of working durable and consistent, independent of any individual staff member’s memory or presence.
- A documentation hierarchy — quality manual, procedures, records — serves different purposes and should not be conflated into a single format.
- Good documents are explicit, accurate to actual practice, and written at a level of detail appropriate to their intended reader.
- Document control requires a defined creation and approval process, with clear version identification to prevent use of outdated copies.
- Uncontrolled copies of procedures are a persistent risk, capable of circulating long after a master version has been updated.
- Obsolete documents should be clearly marked and retained, not deleted, supporting future investigation of historical practice.
Conclusion
Documentation and document control rarely feel as urgent as a critical value notification or an equipment failure, but their quiet, consistent discipline is what makes every other quality process in this training program actually reliable and repeatable across time and staff turnover.
ISO 15189:2022’s requirements in this area ensure a laboratory’s documented way of working genuinely reflects, and genuinely guides, how work is actually performed — not a parallel paper reality maintained only for assessment purposes.
Learn how the control of records builds on document control in the next course of this ISO 15189:2022 training series.
Source note: this article draws on “Quality Management in Clinical Laboratory Demystified” by Dr. Taleb Chalab Cham, ISO 15189:2022, and widely recognized clinical laboratory quality references including CLSI guidelines, CAP accreditation checklists, and WHO laboratory quality guidance.
