Abstract: A system and method for performing RCM analysis is disclosed. The system is an automated system for performing RCM analysis/maintenance program development requirements. The invention adheres to MSG-3 standards and guidelines. The system provides a user interface which is broken down in a hierarchical fashion which easily allows a user to enter data in accordance with MSG-3 procedures. A database includes one or more systems. Systems can be further refined to include one or more subsystems, sub-subsystems and parts. RCM analysis is performed at a Maintenance Significant Item (MSI) level which includes defining reliability data for the MSI. A part, by definition is an MSI. However, a subsystem or a system can also be an MSI. A system includes functions. A function can have one or more failures associated with it. There can be one or more effects associated with a failure. There can be one or more causes for an effect.

Abstract: A piezoelectric printhead or other droplet deposition apparatus has parallel liquid containing channels defined by a base and displaceable walls, and covered by a cover number. The channels each have at least one nozzle for ejecting droplets. Each nozzle may be disposed in the base, the cover then having two ink supply parts spaced lengthwise of each channel on opposite sides of the nozzle. Alternatively two longitudinally spaced nozzles may be provided in the base of each channel. The cover may have a conductive track corrected to wall-displacing electrodes, the points of connection being outside the channels.