Doubt about how to represent an OR condition in Result

  Hi,
  I have the following problem. I defined a process like this:
  
composed process A
  composedOf Sequence
    process B
     composedOf Split
       process C
       process D
       process E
    process F
    
  This way, process B output is the conjunction of the output of 
processes C, D and E. So, if everything goes right in process B, it
means that all the 3 processes execute correctly and the output is
Ok. However, if one or more of these 3 processes did not execute
correctly, also didn't process B. I don't know how to represent the
negative result, I mean, the fact that if one of the 3 processes
go wrong, does process B. The positive result condition is the
conjunction of the 3 positive results, and what is the negative
result condition, if I can't specify 3 different conditions for
exactly the same effect and output?
  Thank you all,
  Tatiana.

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