Why not take stock with the goal of developing a “needs-based maintenance strategy” and see where that leads?

Let's compare the DIFFERENT IMPACT and SCOPE of INDUSTRIAL VENTILATION, depending on its area of application, using two simple examples:

INDUSTRIAL VENTILATION SYSTEMS IN A ROLLING MILL
If a large gearbox fails in a rolling mill, production often comes to a standstill for a few days, causing enormous costs, leaving employees with nothing to do, and preventing production targets from being met. Sometimes, a single unplanned shutdown can be responsible for the difference between black and red figures at the end of the year.

If, in the same rolling mill, “only” an industrial fan fails instead of a large gearbox, the problem can usually be solved quickly and production can continue without any problems ...

INDUSTRIAL VENTILATION SYSTEMS IN HEALTHCARE
However, if industrial ventilation systems fail, for example in a food production facility, a laboratory, or a hospital, this usually has an enormous impact on daily operations and can sometimes cost a lot of money or even lives... 

Criticality analysis can be used to examine, stabilize, and optimize entire processes (click on the image for an illustration).

Technical data sheets or further information available on request.
Image source: SKF