> Not following instructions is foreseeable misuse...

Depends.

I define "misuse" as using the product for some use other than its intended 
use. Standing on a chair is misuse of the chair.  

Misuse (my definition) cannot be foreseeable because it depends on what the 
user needs to do (and has decided that the product will do what he wants to 
do).  Think McGyver, the TV show.  McGyver found imaginative "mis"uses of 
ordinary items to help him get out of various situations.  
https://en.wikipedia.org/wiki/MacGyver

"Not following instructions" is a fault condition: a fault of a behavior that 
is specified in the instruction.  As a fault, it can be included in a fault 
tree.  

A fault tree can only be made for a single top event.  Misuse (my definition) 
and "not following instructions" are not likely to have the same top event and 
so would have separate fault trees. 

If you define "misuse" as "not following instructions," then one top event and 
one fault tree.


Rich 
 

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