ISO 6658:1985 PDF

The guidance comprises three main parts, covered in clauses 4, 5 and 6. Clause 4 gives "General requirements". Clause 5 "Test methods" describes all main tests, under five headings: definitions, application, assessors, procedure, interpretation of results. Clause 6 "Analysis of results" is concerned with the statistical treatment of the results. An annex gives statistical terms.