ISO/IEC 17025 clause 6: demonstrate laboratory resource capability
Clause 6 addresses the resources needed for valid laboratory work: people, facilities, equipment, traceability and external support. The requirement is not simply to own suitable-looking equipment or keep supplier certificates. The laboratory needs to show that its resources support the activities and results for which it is responsible.
What clause 6 requires in practice
Clause 6 groups the resources that valid laboratory work depends on. It begins with a general requirement (6.1): the people, premises, equipment, systems and support services needed to run and carry out the work must be at the laboratory's disposal. Five detailed parts follow.
Personnel (6.2) must act impartially, be competent and work within the management system, with documented competence requirements and authorisation for specific tasks. Facilities and environmental conditions (6.3) must suit the work and not undermine results, with requirements documented and conditions monitored and controlled. Equipment (6.4) covers access, handling, verification before use, calibration where needed, status identification, records and action when items become doubtful. Metrological traceability (6.5) requires results linked to an appropriate reference through a documented chain. Externally provided products and services (6.6) must be suitable, with defined requirements and evaluation of providers.
The output is evidence that each resource fits the actual method and result.
6.1 and 6.2: provide resources and demonstrate competence
The laboratory needs access to the people, facilities, equipment, systems and supporting services necessary for its activities. For personnel whose work can influence results, it must define competence requirements and demonstrate competence for assigned responsibilities. Duties and authority need to be understood.
Selection, training, supervision, authorisation and ongoing competence monitoring require appropriate procedures and records. Authorisation is task-specific: performing a routine test, validating a method, interpreting a result and approving a report are different responsibilities. Course attendance can support development, but it does not by itself show that an individual can perform every assigned laboratory activity competently.
6.3: control conditions that influence results
Facilities and environmental conditions need to be suitable for the work. Establish the relevant conditions and monitor, control and record them where methods, specifications or result validity require it. Consider access, separation of incompatible activities, contamination and interference. The same responsibility applies when work is performed away from permanent premises.
As an implementation example, an environmental log is more useful when staff understand what happens if a limit is exceeded. A completed record with no response to unsuitable conditions does not establish that affected work remains valid.
6.4: manage equipment through its working life
Equipment must be suitable for its intended use and checked before being placed or returned into service. Controls extend beyond calibration labels to handling, maintenance, software or firmware where relevant, status identification, records and protection against unintended adjustment.
Calibration is required where measurement accuracy or uncertainty affects the reported result's validity, or where it establishes the result's metrological traceability. The laboratory needs a calibration programme that is reviewed as necessary. Do not turn this into an unsupported rule that every item must be calibrated once a year.
When equipment is damaged, suspect or outside requirements, prevent its inappropriate use and examine the possible impact on earlier work. Returning an instrument from repair is not the end of the issue: appropriate verification and decisions about affected results may still be necessary.
6.5: establish traceability appropriate to the result
Metrological traceability connects a measurement result to an appropriate reference through a documented calibration chain, with uncertainty contributions considered. Where technically possible, the relevant connection is to the International System of Units. Suitable routes can involve competent calibration laboratories, certified reference materials or direct realisation of SI units.
Where SI traceability is not technically possible, the standard permits appropriate alternative references. Avoid the misleading statement that every measurement must always be traceable to SI in the same way. Assess the intended measurement, reference, competence and evidence rather than treating a logo on a certificate as the entire traceability argument.
6.6: control what external providers contribute
Externally supplied products and services affecting laboratory activities need defined requirements and suitable evaluation, selection, monitoring and acceptance arrangements. Communicate what the laboratory needs, including relevant competence and acceptance criteria. Retain the required records and act on performance concerns.
This can include calibration services, reference materials, equipment maintenance or external laboratory activities. An approved-supplier list can be useful, but a supplier's suitability may depend on the particular service, method or range being purchased. Approval should not become a permanent exemption from technical evaluation.
A practical resource review
Sterling recommends starting with a representative method and asking what it depends on. Identify the authorised personnel, critical equipment, reference materials, environmental controls, external services and information systems. Check whether each dependency has evidence that matches the actual use.
Then examine changes: a new analyst, a replacement instrument, a revised method or an alternative supplier. Decide which checks and authorisations are affected before the change is introduced. A resource register or software workflow can organise these decisions, but the laboratory's technical evaluation remains essential.
Why resource capability matters to the business
A laboratory sells confidence. That confidence rests on resources which are suitable for the exact work being reported, not on how impressive the building or instrument list looks. Customers, regulators and assessors increasingly ask for the reasoning behind a result.
For management, clause 6 is also a budgeting guide. It shows where money produces real capability, such as training, calibration, environmental control or better supplier selection, and where it merely adds cost. Companies that review resources against methods before accepting new work avoid expensive reversals and protect the reputation of the service.
How to implement clause 6
Approach resources through the work they support, one representative method at a time.
- Choose a method that matters commercially and list the people, facilities, equipment, reference materials, services and systems it relies on.
- For each dependency, find the evidence that it is suitable for this specific use, not just that it exists.
- Check competence and authorisation for every task, including review and release.
- Confirm that environmental conditions, calibration coverage and traceability match the performance the method requires.
- Review how external providers were chosen and whether their service matches what is actually purchased.
- Repeat the exercise whenever a new analyst, instrument, supplier or method is introduced, and feed gaps to management for decisions.
- Present the findings to management as decisions needed, for example training, equipment, supplier or staffing, so the review leads to action rather than a filed document. Record who owns each action and when management will look at progress.
Illustrative example: a calibration that does not cover the work
A laboratory receives a current calibration certificate for a temperature device. Its staff assume the date and supplier accreditation are sufficient. The certificate, however, does not demonstrate the range or uncertainty needed for the particular test conditions. The instrument may still need additional work before the laboratory can rely on it for that use.
A useful response examines the method's needs, the calibration service actually supplied and the effect on any work already performed. This fictional example shows why procurement and technical acceptance should connect. It does not prescribe a particular calibration provider or a universal interval.
Evidence and common mistakes
An assessor may examine competence records and authorisations, environmental controls, equipment records, calibration evaluations, traceability evidence and external-provider decisions, then compare them with observed work. Review whether records relate to the activity being demonstrated, rather than merely checking that a file exists.
- Avoid equating a training certificate with task competence.
- Do not ignore work performed with equipment outside permanent control.
- Do not use a calibration label as a substitute for evaluating calibration results.
- Do not overlook the effect of unsuitable equipment on previously reported results.
- Do not assume that a shared resource across sites is suitable for every local method.
Construction example: resources at the point of use
A temporary materials-testing location receives the same equipment list as the main laboratory, but power quality and storage conditions differ. The team examines what the actual methods need, establishes relevant controls and checks competence for the site duties. Equipment identity alone does not demonstrate the site's readiness. Records of checks, conditions and authorised work should connect the resources to the activity actually performed.
Go deeper into this clause
Explore each numbered part
6.1 · resources needed for reliable laboratory work
Assess whether the laboratory has the people, facilities, equipment, systems and support services needed for the work it accepts. This guide explains the general resource requirement and its links to the detailed subclauses, with examples showing why buying an instrument or hiring an analyst alone does not establish complete capability.
6.2 · demonstrate personnel competence
Build personnel competence around the activities and decisions that influence laboratory results. This guide connects documented competence requirements with selection, training, supervision, authorisation and ongoing monitoring. Practical examples explain why qualifications and course attendance alone do not demonstrate the ability to perform specific methods or evaluate technical deviations reliably.
6.3 · control facilities and test environments
Identify and control environmental conditions that can affect laboratory results, including work at customer sites. This guide covers documented conditions, monitoring records, access, contamination and separation of incompatible activities. Examples show how to choose limits from the method and technical need rather than copying generic temperature or humidity values.
6.4 · manage equipment from selection to release
Manage the equipment and supporting items that influence laboratory results, including software, reference materials and reagents. This guide explains access, suitability, verification, calibration, intermediate checks, correction factors and records, and connects those controls to action when equipment becomes unreliable. It helps turn an asset register into effective technical control.
6.5 · establish metrological traceability
Establish metrological traceability of measurement results through a documented calibration chain and appropriate references. This guide explains SI traceability, circumstances where another suitable reference is needed and the importance of uncertainty and provider competence. Examples help laboratory teams evaluate the chain behind a result rather than accepting a calibration logo.
6.6 · control laboratory suppliers and services
Select and control external products and services that affect laboratory activities, from reference materials and calibration to outsourced testing and IT support. This guide explains requirements, evaluation, acceptance, monitoring and supplier communication, with examples showing why an approved-supplier list or a low price cannot replace a technical suitability decision.
Frequently asked questions
Must the laboratory own all equipment?
The standard requires access to suitable resources and appropriate control, including equipment outside permanent control. Ownership alone neither establishes nor removes the laboratory's responsibilities.
Does every instrument need annual calibration?
No universal annual interval is set here. Establish and review the programme according to the equipment's use, performance and applicable requirements.
Will automation replace technical review?
No. Effivity ISO & GRC automation software can support agreed records and workflows, but competent people must evaluate suitability, uncertainty, performance and the consequences of changes.
Connect capability gaps with an implementation plan
Discuss laboratory resource and competence gaps with Sterling. A scoped programme can coordinate technical actions, documentation, employee learning and assessment preparation across locations. Start team learning with ISO/IEC 17025 awareness training; agree specialist competence needs separately.