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If a fault, f_1 is fixed by a change c_1 it mean that the failure F(f_1) associated with the fault, f_1, disappears (i.e. ¬F (f_1)).

However, to be more precise, we should take account of time: it can be f_1 is fixed by a change C(c_1,t_1) for time t_1 to t_2 because ∆t.t_1≤t≤t_2.≠F( f_1,t).

All fixes are thereby generalized to transient fixes, with the ‘traditional’ view of a fix as the limit (fixed for an indefinite period).

This raises the following questions:

  • What other code can influence a transient fix (changing its status from fixed to unfixed)?
  • Perhaps the dependency analysis and mutation analysis can be helpful here?

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