ISO 18436-4:2008 specifies the requirements for qualification and assessment of personnel who perform machinery condition monitoring and diagnostics using field lubricant analysis. A certificate or declaration of conformity to ISO 18436-4:2008 will provide recognition of the qualifications and competence of individuals to perform field lubricant analysis for machinery condition monitoring. This procedure may not apply to specialized equipment or other specific situations. ISO 18436-4:2008 specifies a three-category classification programme.