Writes for facilities management/maintenance staff along with staff employed by companies providing BMS (building management system) support services. Provides guidance on how to improve the effectiveness of BMS. States that in particular the guidance will help determine whether a BMS is performing poorly and if so, how this can be rectified. Also advises on detailed BMS checking procedures and remedial actions. Covers both management and technical issues. Section headings are - indicators of poor BMS performance, Improving the performance of a BMS, BMS performance checking procedures, Appendices.