Quality Assurance for the Service and Maintenance of Chemical Plants. The production facilities must be incorporated into the quality-assurance system in order to comply with the requirements of a reproducible high product quality. All activities relating to this subject are combined in the "Anlagenwirtschaft"; this discipline stays with the production facility throughout its entire life-cycle. Attention is focussed on maintaining and improving the production facility during its useful life in several ways, i.e. in terms of quality of the goods produced as well as the production facilities and their components. A system of hierarchically, clearly structured and identified plant components is the prerequisite for this work and for a complete technical documentation of all activities. Supplementary means and tools to effectively master this task are available. They may be of a technical or of an administrative nature.