Facility managers - it is not sufficient for a facility manager to specify maintenance "in accordance with DA19". DA19 is not a maintenance specification and a range of decisions must be made to define the scope and extent of the maintenance program required. Maintenance investment must reflect the risk to the business and the performance level required of the asset. Assets with high performance expectations require performance oriented outcomes-based maintenance approaches... DA19 scheduled maintenance tender documentation needs to define the maintenance level to be applied to each system or item of plant - best practice Level A, good practice Level B, or minimum compliance practice Level C. From this, DA19 provides detailed maintenance schedules with instructions and specified maintenance task frequencies... In any maintenance program, detailed maintenance instructions for all HVAC&R assets need to be compiled. DA19 provides detailed maintenance schedules with instructions and..