How to Define the Scope of ISO 17025 Accreditation for a Laboratory
Author : Accreditation consultancy | Published On : 22 Sep 2026
Defining the scope of accreditation is an important step for any testing or calibration laboratory preparing for ISO/IEC 17025 accreditation. The scope describes the specific laboratory activities for which competence is demonstrated and accreditation is sought. A clearly defined scope helps the laboratory focus its resources on the methods, equipment, personnel, facilities, and technical capabilities needed for the activities included. ISO/IEC 17025 applies to laboratories performing testing, calibration, and relevant sampling activities.
What Is the Scope of ISO 17025 Accreditation?
The scope of ISO 17025 accreditation identifies the particular testing or calibration activities that a laboratory is competent to perform. It should not simply describe everything a laboratory is capable of doing. Instead, it should clearly identify the activities that have been selected for assessment and accreditation.
For example, a testing laboratory may perform chemical, environmental, material, or food testing but choose only specific test methods or parameters for its initial accreditation. Similarly, a calibration laboratory may define its scope according to particular measurement areas, ranges, equipment, and calibration capabilities.
A well-defined scope therefore provides a practical boundary for the laboratory's accredited activities and helps customers understand which results are covered by accreditation.
Steps to Define an ISO 17025 Accreditation Scope
1. Identify the Laboratory Activities
Start by listing the testing, calibration, and sampling activities currently performed by the laboratory. Consider the services regularly provided to customers and identify which activities are technically established and supported by appropriate resources.
Before finalizing the accreditation scope, laboratories should evaluate their current management system, technical capabilities, equipment, methods, personnel competence, and records. An ISO 17025 accreditation gap analysis can help identify areas that require improvement before specific activities are included in the proposed scope.
2. Select Applicable Methods
Identify the methods used for each activity. These may include standard methods, modified methods, non-standard methods, or laboratory-developed methods, depending on the laboratory's operations. The selected methods should be appropriate for the intended application and supported by evidence of competence.
3. Define Parameters and Measurement Capabilities
The scope should be sufficiently specific to communicate what the laboratory can perform. Depending on the discipline, this may involve identifying parameters, materials or products tested, measurement ranges, equipment, techniques, or other relevant technical details.
For calibration activities, measurement capability and applicable ranges are particularly important. For testing activities, the scope may need to identify the product or material, characteristic being measured, and applicable test method.
4. Check Resources and Technical Competence
Before including an activity, confirm that the laboratory has suitable equipment, facilities, competent personnel, controlled methods, and appropriate technical resources. Accreditation assessment considers the laboratory's ability to competently perform the specific activities included in its scope.
5. Review the Scope Before Application
Review the proposed scope with relevant technical personnel and quality management staff. Check that the listed activities accurately represent what the laboratory can demonstrate in practice. A focused and realistic scope can make accreditation preparation more manageable than including activities that are not yet fully established.
Why Accurate Scope Definition Matters
A clearly defined scope helps prevent misunderstandings about which laboratory services are accredited. It also provides a useful basis for preparing methods, validation or verification activities, measurement uncertainty evaluations, proficiency testing, internal audits, and supporting records.
Laboratories may later seek to extend their scope when new methods, parameters, or technical capabilities become established. The approach should therefore support both current accreditation needs and future laboratory development.
Get Professional Support for ISO 17025 Accreditation
Defining the scope can involve technical and management considerations, particularly when a laboratory has multiple disciplines or a wide range of testing and calibration activities. Professional ISO 17025 accreditation consultancy can help laboratories with system implementation, documentation, internal auditing, method validation, uncertainty of measurement, and auditor training.
A carefully prepared scope gives the laboratory a clear starting point for demonstrating competence and building an effective ISO/IEC 17025 accreditation system.
