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ISO/IEC 17025 guide

ISO 17025 implementation plan: phases, owners, deliverables and decision points for ISO/IEC 17025 accreditation

Clause by clause: ISO/IEC 17025:2017 requirements: every clause explained →

How to run ISO/IEC 17025 accreditation as a laboratory project: seven phases with week ranges, the deliverables and owner of each, the decisions management must take, the four roles, and how Design™ or Drive™ shares the work.

  • Updated September 2026
  • 8-minute read
  • Part of the ISO/IEC 17025 hub

Key points

  • An ISO 17025 implementation plan turns accreditation into a laboratory project: seven phases, each with an owner, a set of deliverables, a week range and a decision that must be taken before the next phase can close.
  • A first accreditation typically runs six to twelve months, because method validation, proficiency testing rounds and the accreditation body's own schedule cannot be rushed.
  • Four roles carry the work: a sponsor from top management, a quality lead, method owners and internal auditors who cover the technical clauses.
  • Design™ and Drive™ are alternative routes through the project; they change who drafts and who chases actions, never who authorises staff or who answers the assessor.

What does an ISO 17025 implementation plan have to do?

An ISO/IEC 17025 implementation plan answers one practical question: who produces which piece of evidence, by which week, and who signs it off. It lists every method on the intended scope of accreditation, the work each one needs, and the dates that sit outside the laboratory's control.

A laboratory plan differs from a management system project in one respect. Much of the work is technical: verifying or validating methods, evaluating measurement uncertainty, bringing calibrations and traceability up to date, and showing that results stay valid through quality control and proficiency testing. They depend on instrument time and external rounds, so they are scheduled first. The standard itself does not require a project plan; the plan exists so that the records the assessor samples are complete when the application goes in.

The phases: weeks, deliverables, owners and decision points

The ranges below describe a single-site laboratory with a handful of methods, from a well-prepared start to a slow one. Your own plan fixes one date per row and adds a line for every method.

PhaseWeeksDeliverablesOwnerDecision point
1. Mobilise and scope1 to 3Draft scope: tests or calibrations, methods, ranges and sites; the accreditation body chosen and its Global ACI MRA status checked for that scope; roles namedSponsorSponsor approves the scope, the body and staff time
2. Gap analysis and action plan2 to 5Gap report method by method; methods sorted into verification or validation; calibration, traceability and proficiency testing gaps; dated actionsSterling consultant, with the quality leadSponsor accepts the action plan and a target application month
3. Build the system and the technical evidence4 to 26Impartiality risk assessment; procedures; verification and validation files; uncertainty budgets; updated calibrations; competence criteria and authorisationsMethod owners and quality leadEach method file approved; each analyst authorised for the methods they run
4. Operate and monitor validity8 to 40Contract reviews, item logs and technical records from routine work; control charts; proficiency testing or interlaboratory comparison results and the actions takenMethod ownersQuality lead confirms each method has enough data to show it is under control
5. Internal audit and management review20 to 44Audit of clauses 4 to 8, including witnessed work; corrective actions closed with evidence; the management review recordInternal auditors; top managementManagement review decides: apply now, or not yet
6. Accreditation body assessment24 to 52Application and documents; pre-assessment where offered; on-site assessment with witnessing; corrective action evidence by the body's deadlineQuality lead; assessment by the bodyThe accreditation body's committee decides on accreditation
7. Sustain™From the grantYear-one calendar of proficiency testing, internal audits, reviews and the first surveillance visitQuality lead and method ownersSponsor confirms the calendar and any scope extension

Phases 3 and 4 overlap on purpose. A method goes into routine use as soon as its file is approved, so its records and quality control data build up while other methods are still being validated. How phase 2 works is set out in ISO/IEC 17025 gap analysis: what it covers and what you get, and the calendar in more depth in ISO/IEC 17025 timeline: how long accreditation takes, stage by stage.

Who owns what: the four roles in a laboratory project

ISO/IEC 17025 does not prescribe a project team. Its structural requirements expect the laboratory to define its responsibilities and give people the authority and resources for their work, its resource requirements expect competence to be evidenced and staff to be authorised, and Option A of clause 8 includes internal audits and management reviews.

  • Sponsor. A member of top management who owns the application date, protects technical staff time from the routine workload and takes each decision in the phase table.
  • Quality lead. Runs the weekly review of the plan, keeps procedures and records under control, prepares the application and is the accreditation body's main contact. Agree their project hours in writing.
  • Method owners. The senior analyst or metrologist for each method or discipline. They write or check the verification or validation file, build the uncertainty budget, keep equipment and calibration records current and answer the technical assessor.
  • Internal auditors. At least two trained people who can audit both the management system and the technical work, ideally without auditing their own methods. The method is covered in ISO/IEC 17025 internal audit: the technical clauses.

Design™ or Drive™: choosing how the work is shared

Every Sterling engagement follows Sterling OS™. Design™ and Drive™ are two alternative routes through phases 1 to 6, and a laboratory takes one or the other, never both in sequence. Under Design™ your staff carry out the implementation with Sterling's structure, templates, workshops and coaching. Under Drive™ Sterling's consultants take on the agreed share of the consulting and documentation work alongside your method owners. Sustain™ is phase 7.

Work in the planDesign™ (guided)Drive™ (managed)
Gap analysis and action planSterling, with your quality lead and method ownersThe same
Procedures, forms and the impartiality risk assessmentDrafted by your staff on Sterling templates; Sterling reviewsDrafted by Sterling consultants with your staff, who correct and approve
Validation and verification files, uncertainty budgetsYour method owners, coached in workshopsPrepared with Sterling consultants; the experimental work and data remain your laboratory's
Chasing actions between weekly reviewsYour quality leadMainly Sterling consultants
Internal audit and management reviewConducted or facilitated as agreed; top management holds the reviewThe same
Authorising staff and answering the assessorYour laboratoryThe same

Design™ suits a quality lead with time; Drive™ suits a hard deadline, a stretched team or several disciplines. Neither route shortens a proficiency testing round or the time it takes to build quality control data.

Five mistakes that stall ISO 17025 projects

  • Too wide a first scope. Putting every method on the first application multiplies validation work and assessment days. Start with the methods customers or regulators ask for, and extend later.
  • Procedures before methods. Polishing the manual while no method is verified leaves the technical evidence until last. Schedule the validation work first.
  • Proficiency testing booked late. Rounds run on the provider's calendar. Book them in phase 2, or plan an interlaboratory comparison where no suitable scheme exists; Proficiency testing and interlaboratory comparison under ISO/IEC 17025 explains the options.
  • Authorisations written at the end. Competence records created in the final month show dates that do not match the work, and assessors notice.
  • An internal audit that skips the bench. Auditing documents alone misses what the technical assessor will witness. Include observed tests or calibrations and a traced-back report.

How Effivity keeps the plan and the management system records together

In a Sterling engagement the plan and the management system records sit in Effivity, the Sterling group's ISO and GRC platform, used in 50+ countries and included with the engagement at no additional cost. Gap analysis actions carry owners and due dates, and overdue items are flagged.

  • Management system records: controlled procedures, the risk register, competence and training records, equipment and calibration records, supplier evaluations, complaints, corrective actions, internal audits and management reviews.
  • Technical records: raw data, uncertainty calculations and control charts stay in the laboratory's own technical systems and are linked or attached as evidence where the management system needs them.

What the platform covers is set out in Effivity for ISO/IEC 17025: the guide.

How Sterling builds your implementation plan

Every method on a line, every line with an owner and a date.

Sterling's gap analysis ends in your plan, built method by method and dated back from the month you intend to apply. Design™ or Drive™ carries the work, Effivity holds the actions and the records, and the proficiency testing and calibration dependencies are scheduled from the first week. We ensure successful accreditation for our clients. Accreditation itself is assessed and decided by the accreditation body; Sterling does not accredit.

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ISO 17025 implementation plan: questions buyers ask

How long does an ISO 17025 implementation plan usually run?

Most first accreditations run six to twelve months from kick-off to the accreditation body's decision. The spread comes from validation work, the proficiency testing calendar and the body's queue.

Is the implementation plan the same as the gap analysis report?

No; the gap report lists what is missing, and the plan turns it into phases, owners, dates and decisions. Both come after the free online readiness check and well before any pre-assessment by the accreditation body, which is the body's own readiness review.

Who should lead the ISO 17025 project in our laboratory?

A quality lead from your own staff should run it, backed by a sponsor from top management. Under Drive™ Sterling consultants carry much of the coordination, but the assessor expects your people to explain and run the system after the engagement ends.

Should proficiency testing results be in hand before we apply?

Plan for it, because the assessor will ask how you ensure the validity of results for each method on the scope. Book suitable rounds early in the project, and confirm the chosen body's own policy on proficiency testing before you set the application date.

What should we do when validation work falls behind the plan?

Re-plan at the next weekly review and decide whether to move the application date or take the late method off the first scope. Removing one method and adding it later through an extension is usually better than applying with an incomplete validation file.

ISO/IEC 17025 implementation

ISO/IEC 17025 requirements

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