Maintenance can account for an extremely large proportion of the operating costs of machinery. Additionally, the downtime caused by machine breakdowns can severely affect the productivity of factories or the safety of products. Thus, it is becoming increasingly important for companies to consider the monitoring of their equipment 'in situ' in order to reduce the number of breakdowns experienced and to avoid the unnecessary cost and delay caused by repairs. Engineering Condition Monitoring provides an overview of all aspects of this important technique paying special attention to the vibration analysis of rotating machines. The text will be suitable for industrial practitioners and managers along with postgraduate students involved in mechanical and manufacturing engineering. The authors have used their vast collective experience both in industry and as academic teachers to produce a broad, descriptive text, concentrating on practical aspects, that will be invaluable to anyone involved in the operation or sub-contracting of condition monitoring methods.