Terotechnology ( / -/; from Greek τηρεῖν tērein "to care for" and technology) is the technology of installation, commissioning, maintenance, replacement and removal of plant machinery and equipment, of feed-back to operation and design there of, and to related subjects and practices.
Terotechnology is the maintenance of assets in optimal manner. It is the combination of management, financial, engineering, and other practices applied to physical assets such as plant, machinery, equipment, buildings and structures in pursuit of economic life cycle costs. 
It is concerned with the reliability and maintainability of physical assets and also takes into account the processes of installation, commissioning, operation, maintenance, modification and replacement. 
It can be applied equally to products, as the product of one organization often becomes the asset of another. 
- The dictionary definition of terotechnology at Wiktionary
- Collins English Dictionary – Complete and Unabridged, HarperCollins Publishers 1991, 1994, 1998, 2000, 2003