This page provides links to the forms that are used by a NVLAP assessor to record the results of a laboratory's on-site assessment. These forms constitute the "On-Site Assessment Report."
Assessors use checklists to ensure that each laboratory receives an assessment comparable to that received by others. All NVLAP programs use the NVLAP General Criteria Checklist, which contains the requirements published in ISO/IEC 17025 and NIST Handbook 150 Annexes A, B, and E. The NIST Handbook 150-xx series checklists (Program-Specific Checklists) address requirements that are specific to a particular field of accreditation.
The Test Method Review Summary, used in conjunction with the checklists in most testing programs, is a tool for capturing information about the test methods assessed at a laboratory and the extent of the assessment. For each test method, the assessor records the depth of the assessment and other pertinent information.
Please read the Instructions to the Assessor (located in the Documents Library on the NVLAP Information Web System (NIWS) Assessor Portal) and check here frequently for new or revised forms. Unless marked otherwise, each form listed is the latest controlled version which is also available in the NIWS Assessor Portal.
Documents marked as "Word" have been enabled for electronic input using Microsoft Word. For help with using these forms, visit our link at Tips for Working with Microsoft Word Forms.
Microsoft Office software is identified in order to assist users of this web site. In no case does such identification imply recommendation or endorsement by the National Institute of Standards and Technology. If you are having trouble using these documents, please reach out to NVLAP at NVLAP [at] nist.gov (NVLAP[at]nist[dot]gov), or 301-975-4016.
On-Site Assessment Forms | File Format | Revision Date |
NVLAP General Criteria Checklist (ISO/IEC 17025:2017) See NIWS Assessor portal for latest edition. | 2026-03-11 | |
| On-Site Signature Sheet with Narrative * | ||
| Word | 2026-03-11 |
| Word | 2026-03-11 |
| On-Site Assessment Summary * | Word | 2024-09-06 |
| Test Method Review Summary | Excel | 2022-12-07 |
| * Required for all programs in addition to the appropriate program-specific forms. | ||
| Program-Specific Checklists - See NIWS Assessor portal for latest editions of program checklists. | ||