more loco suck on broken down!

[tokama]

if I have multi-head, named A & B ,
when the reliable of both head become 1%,
you will never stop the train!

Once one of them (head A) is broken down,
you will need to wait it recover until you renew that.
However, before that become to recover,
another head (head B) is broken down,
you will need to wait it recover until you renew that.
However, before head B become to recover,
head A ...................

You will know what I means.

Any tools make the cars never broken down ?

[Vimp]

-->No breakdowns
-->Reduced breakdowns

[spaceman-spiff]

Is it that hard to find those topics ?
Closed, discuss it further in there