The evaluation of the performance (Conditions A and B are two types of successful alarms)

for each alarming function in {Hrsat, PI, RI} do

$f$ = alarming_function

if $\mathrm{prec}\left(f,\mathrm{activity},S,\Delta t\right)$ > $\mathrm{prec}\left(\mathrm{random},\mathrm{activity},S,\Delta t\right)$: /* Condition A

A positive value of high_f tends to precede high_ activity in region S within the precedence of Δt

if $\mathrm{delay}\left(\mathrm{activity},f,S,\Delta t\right)$ > $\mathrm{delay}\left(\mathrm{random},f,S,\Delta t\right):$ /* Condition B

A positive value of high_activity tends to be after high_f in region S within the delay of Δt

end if

end for