UKAS Assessment Readiness Guide for Medical Laboratories
A UKAS assessment rarely fails because a laboratory has no documents. It usually becomes difficult when the laboratory cannot show that its processes work in practice, that staff are competent, and that evidence supports the claims made in the quality management system.
For UK medical laboratories, accreditation is based on ISO 15189:2022, the standard for quality and competence in medical laboratories. It also covers point-of-care testing, where POCT falls within the laboratory’s managed scope.
The aim of preparation is simple: make assessment readiness part of routine laboratory control, not a short burst of activity before the assessment date.
What a UKAS assessment looks for
The United Kingdom Accreditation Service, known as UKAS, is the UK’s national accreditation body. For medical laboratories, UKAS assesses whether the laboratory can demonstrate competence for the activities within its accreditation scope.
An assessment will usually consider both:
the management system, including governance, document control, risk, audit, nonconformity and improvement
the technical activities, including methods, equipment, staff competence, quality control, result reporting and the validity of examinations
The assessment is not just a document review. Assessors look for evidence that requirements are understood, implemented and effective.
That means a laboratory should be ready to answer questions such as:
Is the stated scope accurate and current?
Can staff explain and follow the procedure they perform?
Are records complete, legible, controlled and retrievable?
Is competence assessed against defined criteria?
Are risks identified, reviewed and acted on?
Do corrective actions remove the cause of problems?
Does quality control data support the release of results?
Are changes validated or verified before use?
The UKAS readiness self-assessment tool can help laboratories identify weaker areas before application or reassessment. It should not be treated as a form to complete once. It is more useful as a working gap analysis tool.
Start with scope and governance
A clear scope is the foundation of assessment readiness. If the scope is vague, outdated or not aligned with current practice, the rest of the system becomes difficult to defend.
Review the scope against actual laboratory activity. Include examination types, sample types, technologies, sites, POCT services and any outsourced activities where relevant. Check that the laboratory can produce technical evidence for everything it claims to perform.
Governance should also be clear. Staff need to know who has authority for key decisions, including:
approval of procedures
acceptance of validation and verification evidence
release of results
management of nonconformities
review of quality indicators
authorisation of changes
oversight of POCT, where applicable
A useful readiness exercise is to choose one examination from the scope and trace it from request to report. This will show whether the pathway is controlled from end to end.
Readiness area | Evidence assessors may expect |
Scope | Current scope, method list, sample types, sites and service boundaries |
Governance | Defined roles, responsibilities, reporting lines and authorisations |
Process control | Current SOPs, records, environmental monitoring and workflow controls |
Technical validity | Verification, validation, uncertainty where relevant, QC and EQA records |
Improvement | Audit findings, complaints, CAPA, trend review and management review |
Make documentation useful and controlled
Documents need to support safe, consistent laboratory work. A long SOP that staff cannot follow is not strong evidence of control.
Check that policies, procedures, forms and records are:
current and approved
available at the point of use
protected from unauthorised change
removed from use when obsolete
aligned with actual practice
written in language staff understand
Document control should also cover external documents, such as manufacturer instructions, standards, guidelines and referral laboratory information.
A common issue is drift between SOPs and practice. For example, staff may follow a newer analyser workflow, while the procedure still describes an older process. During assessment, that gap can raise questions about change control, training and document review.
Use document review as a practical exercise. Ask staff to perform a task using the current SOP and note where the instruction is unclear, outdated or incomplete. This tests whether the document supports the work, not just whether it exists.
Prove competence with more than training records
Training and competence are not the same thing. Training shows that staff received instruction. Competence shows that staff can perform defined tasks correctly and consistently.
For each role, the laboratory should define what competence means. This may include:
direct observation of practical work
review of result interpretation
successful completion of supervised cases
understanding of limitations and acceptance criteria
response to abnormal or unexpected results
knowledge of escalation routes
ongoing performance review
Competence records should be specific to the activity. A general sign-off saying “competent in haematology” is rarely as useful as clear evidence linked to named procedures, analysers, sample types and reporting responsibilities.
Ongoing competence matters too. Staff may need reassessment after long absence, method changes, equipment replacement, poor performance, nonconformities or changes in scope.
For POCT, competence control can be more complex because users may sit outside the main laboratory team. A readiness plan should show how the laboratory oversees POCT training, authorisation, device use, quality checks, record keeping and user access.
Treat risk as a working system
ISO 15189:2022 places clear emphasis on risk-based thinking. Risk should not sit in a spreadsheet that is only opened before assessment.
A practical risk system links hazards to real controls. It should cover patient safety, sample integrity, result accuracy, continuity of service, staff safety and information handling.
Examples include:
misidentification of samples
delayed transport
reagent stock failure
analyser downtime
incorrect reference intervals
unauthorised POCT use
reporting delays
transcription errors
failure to act on EQA performance
Each risk should have proportionate controls. These might include barcode checks, transport temperature monitoring, contingency analysers, stock monitoring, access control, critical result procedures or escalation pathways.
The strongest evidence shows that risk is reviewed when things change. New equipment, a new method, a new referral pathway or a change in staffing can all alter the risk profile.
Use CAPA to fix causes, not symptoms
Corrective and preventive action, often shortened to CAPA, is a key area in any assessment. The laboratory needs to show that it can identify problems, investigate them, act on the cause and check whether the action worked.
A weak CAPA closes the issue too early. For example, if a sample labelling error leads only to “staff reminded”, the underlying cause may remain. Was the request form unclear? Was workload unusually high? Was the bedside identification process weak? Was training inconsistent?
A stronger CAPA record usually includes:
clear description of the nonconformity
immediate containment action
assessment of patient or service impact
root cause analysis
corrective action linked to the cause
responsible person and due date
evidence of completion
effectiveness check after a suitable period
Not every issue needs a lengthy investigation, but repeated minor issues should be reviewed for trends. Several small failures may point to one larger process weakness.
Build strong technical evidence
Technical evidence is where assessment readiness often becomes most visible. The laboratory must show that its methods, equipment and processes produce valid results for their intended use.
For each examination or method, check that evidence supports:
selection of the method
verification or validation before use
defined acceptance criteria
measuring interval and limitations
quality control design
EQA participation where available
comparison studies where relevant
reagent and lot change control
equipment maintenance and calibration
result authorisation and reporting rules
Verification and validation records should be easy to follow. They should show what was tested, why it was enough, who approved it and what decision was made.
Quality control records should tell a clear story. Assessors may look at how the laboratory responds to internal QC failures, EQA poor performance or unusual trends. The key question is not whether failures ever happen. They do. The question is whether the laboratory detects, investigates and controls them before patient results are affected.
Equipment records should also be complete. Maintenance, calibration, service reports, fault logs, downtime records and return-to-service checks all help show control.
Prepare staff for assessor conversations
Assessment interviews are not exams, but staff should feel prepared to explain their work. A good assessor conversation often follows a simple pattern:
Show me how you do this task.
Show me the procedure you follow.
Show me the record you create.
Explain what you do if something goes wrong.
Explain how you know the result is valid.
Staff should not rehearse scripted answers. They should understand the system well enough to speak naturally and show evidence.
Short readiness walkarounds can help. Ask staff to choose one task and demonstrate the records linked to it. This may include the SOP, training record, QC log, maintenance record, risk control or incident record.
Managers should also prepare to discuss performance at system level. This includes quality objectives, audit outcomes, complaints, turnaround times, EQA trends, staffing pressures, risks and improvement actions.
Review internal audit and management review
Internal audit should test whether the system works. It should not only check whether a policy exists.
Plan audits across the full pathway, including pre-examination, examination and post-examination processes. Include vertical audits that follow one sample from request to report. Include horizontal audits that examine one requirement across several areas, such as document control or competence.
A strong audit programme shows:
coverage of ISO 15189:2022 requirements over time
use of competent auditors
findings with evidence
timely correction and corrective action
review of trends
follow-up to confirm effectiveness
Management review should then bring the bigger picture together. It should show that leadership uses evidence to make decisions. Inputs may include audit results, nonconformities, complaints, quality indicators, EQA performance, risk review, resource needs, supplier performance and opportunities for improvement.
The output should include decisions, actions, responsibilities and timescales. A meeting record that only lists topics discussed will not show effective review.
Create a practical assessment readiness plan
A readiness plan should be simple enough to use. Build it around the areas most likely to affect competence and patient service.
A practical plan might include:
Confirm the scope
Check it against real activity, sites, POCT services and referral arrangements.
Map key processes
Follow sample pathways from request to report and identify weak handovers.
Review high-risk documents
Focus on procedures used daily, recently changed methods and known problem areas.
Check competence evidence
Make sure records match the tasks staff actually perform.
Test technical files
Confirm that validation, verification, QC, EQA and equipment records are complete.
Review nonconformities and CAPA
Look for overdue actions, repeated issues and weak effectiveness checks.
Update risk records
Link controls to current risks and recent changes.
Prepare staff through walkarounds
Practise evidence-based conversations without scripting answers.
Use the UKAS self-assessment tool
Treat findings as improvement actions, not as a tick-box exercise.
10. Hold a final readiness review
Confirm open actions, evidence gaps, staff availability and assessment logistics.
This approach works best when spread over regular quality activity. Last-minute preparation can tidy records, but it cannot create months of missing evidence.
Make assessment readiness part of routine quality
The most effective laboratories do not treat assessment as a separate event. They build readiness into daily work.
That means procedures match practice. Competence is reviewed before problems appear. Risks are updated when services change. CAPA records show real learning. Technical evidence is complete, traceable and understood by the people using it.
A UKAS assessment then becomes a well-evidenced snapshot of routine performance, rather than a stressful attempt to assemble proof after the fact.
The practical next step is to choose one high-risk examination and trace it from request to report. If the laboratory can show control at every stage, repeat the exercise across the wider scope. That steady habit is the clearest route to lasting ISO 15189:2022 readiness.
Need Help Preparing for a UKAS Assessment?
Elite Scientific Solutions provides specialist laboratory quality and accreditation-readiness support for medical and diagnostic laboratories.
Our services include:
✅ ISO 15189:2022 Gap Analysis
✅ UKAS Accreditation Readiness Reviews
✅ Internal Audit Programmes
✅ CAPA & Root Cause Analysis Support
✅ Risk Management Reviews
✅ Quality Management System Development
✅ Laboratory Quality Training
We can help you identify gaps, prioritise risks, strengthen your quality system and develop a practical roadmap towards accreditation readiness.
Build Better Systems. Strengthen Quality. Advance Your Laboratory.
Important Note
UKAS accreditation is granted against defined accreditation requirements and the laboratory's assessed scope. This article provides general educational information and should not be treated as a substitute for the current applicable UKAS requirements, accreditation guidance or ISO 15189:2022 itself. Laboratories should always refer to the latest requirements applicable to their accreditation scope. UKAS also provides a medical-laboratory readiness self-assessment tool for organisations preparing for accreditation.
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