Algorithm 2: Isolation index of a fault (f) algorithm

Inputs: Theoretical fault signature $Tfs$, observed fault signature $Ofs$, numerical fault signature $Nfs$

Output: Isolation index $Is$

procedure IsolationIndex($Tfs$,$Nfs$,$Ofs$)

$Cfs\leftarrow$Xnor($Tfs$,$Ofs$)

$Is\leftarrow 0$

$nr\leftarrow$Length($Tfs$)

for all $i\in nr$ do

if $Cf{s}_i=1$ and $Of{s}_i=1$ then

$Is\leftarrow Is+1$

if $Cf{s}_i=1$ and $Of{s}_i=0$ then

$Is\leftarrow Is+1$

if $Cf{s}_i=0$ and $Of{s}_i=0$ then

$Is\leftarrow Is-1$

if $Cf{s}_i=0$ and $Of{s}_i=1$ then

$Is\leftarrow Is-Nf{s}_i$

return $Is$