Performance services for environmental applications are an addition to Metso’s life-cycle service concept and the quality assurance procedures of a power plant’s emission monitoring system. Metso customers can select specific services from a roster of application services and take them as part of service agreement or as an occasional service. Auditing includes preliminary onsite work, an audit of applications and systems, user interviews and a written report with a proposed action plan. Experts evaluate the influence of possible changes in measurement systems, environmental permits and process conditions of the applications. Improvement and development needs of the user interface, reports and displays are reviewed. Training needs of different user groups are evaluated. A life-cycle plan of applications is performed as part of the first audit and updated after every audit. This ensures a cost-efficient and systematic approach for upcoming maintenance and updating actions.