GLI GLI Quality Tool
GLI Quality Tool — Version 2.0

Building A Reliable Competency Recalibration Schedule For TB Readers

Tuberculosis laboratories depend on readers who can interpret technical outputs consistently, recognise invalid or unusual results, and escalate findings before they affect patient care or surveillance. For TDQ and drug susceptibility testing (DST) readers, competence is more than completing an initial training session. It must be checked, refreshed and documented at planned intervals, with extra review after equipment changes, incidents, long absences or unfamiliar result patterns.

A practical recalibration schedule gives laboratory managers a repeatable way to maintain reader performance across microscopy, molecular workflows, culture-based testing and instrument interpretation. In Australia, the schedule should also fit NATA accreditation expectations, state and territory referral pathways, regional access constraints and the operating realities of laboratories linked to major centres such as Sydney, Melbourne, Brisbane, Perth and Darwin.

Define The Competencies That Matter

Begin by separating the reader’s tasks into observable competencies. A TDQ reader may need to verify run validity, identify control failures, distinguish reportable findings from technical artefacts and follow the correct escalation pathway. A DST reader may need to interpret growth controls, recognise resistance patterns, review critical concentrations and compare automated results with clinical or reference laboratory information.

Each competency should have a clear performance standard. “Understands the system” is difficult to assess, while “correctly interprets 18 of 20 coded results and explains every incorrect response” is measurable. Include technical knowledge, practical operation, result interpretation, documentation, biosafety and communication with clinicians or reference services.

The schedule should reflect the actual method in use. A reader working with a molecular platform will require different evidence from someone interpreting liquid culture DST or reviewing digital images. Record the instrument, assay version, software, specimen type and result category for every assessment so that competence remains traceable when platforms or algorithms change.

Set A Risk-Based Review Frequency

A fixed annual assessment is a useful baseline, but it should not be the only review. High-risk activities deserve more frequent observation, particularly when a reader releases results that can influence isolation, contact tracing or treatment selection. New staff may need supervised checks at the end of training, again after several weeks of independent work and at a formal six-month review.

A sensible schedule might combine routine, event-triggered and targeted reassessment. Routine checks can occur quarterly for critical interpretation tasks, with a broader competency review every 12 months. Event-triggered checks should follow a nonconformity, an amended standard operating procedure, a major software upgrade, a change in critical concentration or a prolonged period without testing.

In a small laboratory, the schedule may need to account for low testing volumes. A remote service in regional Western Australia or the Northern Territory might not generate enough local cases to demonstrate every resistance pattern. In that setting, use coded panels, referral-laboratory material, validated digital images or external quality assessment samples rather than allowing rare competencies to lapse unnoticed.

Build A Recalibration Calendar

Create a calendar that names each reader, method, assessor, due date, evidence required and follow-up action. Align it with staff rosters, instrument maintenance and external quality assessment cycles. A shared laboratory quality system can provide reminders, but the underlying record should still show what was assessed and whether the person was authorised to work independently.

The calendar should include a short pre-assessment review. Confirm that the reader has current access permissions, has read relevant document revisions and understands recent incident trends. Check whether the instrument, reader software or reporting interface has changed since the previous review. Where testing is shared between a hospital laboratory and a public health service, agree in advance who owns the assessment record.

Use a graded outcome rather than a simple pass or fail. “Competent,” “competent with follow-up,” and “not yet competent” can support proportionate action. Follow-up may involve a supervised run, targeted theory review, repeat interpretation exercise or temporary second checking. Any restriction on result release should be visible to authorised staff and removed only after documented reassessment.

Use Strong Evidence For Reader Performance

A reliable assessment uses several evidence sources. Direct observation shows whether the reader follows specimen identification, instrument checks, control review and result release procedures. Written or electronic case sets test interpretation. Record review can reveal transcription errors, unusual repeat rates, delayed escalation or a pattern of amended reports.

Include both straightforward and difficult cases. A useful panel may contain valid susceptible results, clear resistance, indeterminate findings, contamination, mixed or discordant results, control failures and cases requiring referral. The assessor should evaluate the reasoning process, not just the final answer. A reader who reaches the correct result by bypassing a mandatory check still needs corrective coaching.

External quality assessment and proficiency testing are valuable, but they should not replace local competency assessment. EQA samples are often limited and may not represent the full range of work performed. In Australia, laboratories may also need to show how their internal review connects with NATA documentation, state-based public health reporting and referral arrangements for complex or confirmatory testing.

Evidence To Keep In The Quality File

Manage Changes, Incidents And Drift

Competency can deteriorate gradually when a reader performs a narrow range of tasks or relies heavily on automated flags. Trend the results of internal checks over time rather than waiting for a serious error. A small rise in repeat testing, more frequent second opinions or delayed review of controls may indicate developing uncertainty.

Every incident should lead to a proportionate learning response. A transcription mistake may require a focused reporting check, while a missed resistance signal may require a broader assessment of interpretation, escalation and result communication. The GLI resource on incident reporting guidance can help laboratories structure records so that causes, actions, responsibilities and verification are not lost in informal notes.

Recalibration is also needed after changes in the laboratory environment. New analysers, replacement laptops, revised middleware rules, changed reagent suppliers or a move to a different reporting system can alter how results appear to readers. Australian laboratories should consider local procurement realities, including supplier lead times, service contracts and instrument support across metropolitan and rural sites.

Events That Should Trigger Reassessment

Make Assessment Fair And Operational

Assessors should be technically competent, independent enough to judge performance and familiar with the local procedure. When a small team makes complete independence difficult, use a second reviewer from a connected laboratory, state reference service or quality network. This is particularly useful for regional services that may have limited staffing and cannot remove the primary reader from routine work for long periods.

Use standardised case sets and scoring rules across readers. The assessor should record the task, expected response, actual response, error classification and immediate action. Avoid assessing only during unusually quiet periods; a short observation during normal workflow can reveal interruptions, workload pressures and handover problems that a formal demonstration may miss.

The schedule should respect Australian workplace practices and service continuity. Book assessments around rostered shifts, public holidays and planned leave, while ensuring that urgent TB work remains covered. In Aboriginal and Torres Strait Islander health settings, coordination with public health teams and culturally safe communication pathways may be important when a laboratory result prompts urgent clinical or contact-management action.

Review The Schedule As A Quality Indicator

A competency programme should be reviewed as a system, not treated as a collection of completed forms. Each quarter, examine overdue assessments, recurring error types, time taken to close follow-up actions and the number of readers restricted from independent work. These indicators show whether the schedule is realistic and whether management provides enough protected time for training.

Review the calendar after audits, management reviews and significant workflow changes. If assessments are repeatedly postponed, the problem may be staffing, workload or unclear accountability rather than individual performance. If every reader passes easily but incident rates remain unchanged, the assessment cases may be too simple or the scoring criteria may not test real reporting decisions.

Use the findings to adjust frequency and content. A high-volume metropolitan service may need more frequent checks on rapid molecular interpretation, while a smaller laboratory may prioritise referral decisions and maintenance of rare DST competencies. The aim is a living programme that connects reader capability with patient safety, public health surveillance and dependable laboratory reporting.

Start by mapping every TDQ and DST reader to the methods they perform, then set the first review dates against risk and recent changes. Add measurable evidence, assign assessors and record follow-up actions in the laboratory quality system. A disciplined recalibration schedule will help Australian TB laboratories sustain confident interpretation, demonstrate readiness for accreditation review and protect the reliability of results across metropolitan, regional and remote services.