Performance Evaluation, Monitoring and Measurement of a Laboratory Management System
What this domain tests
How the laboratory knows its system is working: monitoring, quality control of results, internal audit and management review, and how those outputs reach top management.
Core mechanisms
- Ensuring validity of results (7.7) - the lab plans and reviews QC: use of certified reference materials, replicate tests, retesting of retained items, comparison between staff or instruments, and proficiency testing / interlaboratory comparison. ILAC P9 sets expectations on PT participation. QC data must be analysed and trended, not merely filed.
- Measurement uncertainty (7.6) - evaluate contributions, and apply uncertainty when reporting conformity with a specification.
- Internal audits (8.8) - planned intervals, a programme covering the full system, auditors who are impartial and objective (they must not audit their own work), findings reported to top management, corrective action taken without undue delay.
- Management review (8.9) - at planned intervals; inputs include previous actions, audit results, external assessments, PT results, complaints, feedback, resource adequacy, risk identification outcomes and validity-of-results data; outputs cover system effectiveness, improvement, resources and any need for change.
- KPIs - choose measures of effectiveness (turnover time, PT performance, complaint rate, repeat nonconformities) rather than activity counts.
Worked example
A lab's QC charts show a slow positive bias on a trace-metal method, and the last two PT rounds returned z-scores near 2.5. A weak response is to note it in the management review. A strong response is to open a corrective action, investigate calibration of the standard, review the trend across instruments, and set an effectiveness check at the next PT round.
Traps that cost marks
- Collecting QC data without trending or review.
- Assigning an internal audit of a section to its own supervisor.
- Holding a management review with no recorded decisions, owners or dates.
- Selecting KPIs that count activities rather than measure whether processes are effective.