Maintenance and catastrophes
It is important to bear in mind that not all aspects of equipment performance can be maintained. Catastrophes are inevitable and these are usually exhibited by component failure. They can also occur due to human error. Although some devices and components can be replaced, or action taken to monitor performance and replace components before failure, not everything can be maintained. Provision needs to be made as best as possible for catastrophes. Such provision is to enable routine treatment provision to be maintained while equipment repair is completed.