a		power–law exponent,
b		loading parameter,
C		s-n curve material parameter,
d		degree of accumulated fatigue damage,
dc		critical value of accumulated fatigue damage,
dl		common logarithm for the degree of accumulated fatigue damage,
$\overline{d_{l,c}}$		critical value of mean damage degree (in log space),
D		degree of accumulated fatigue damage (random variable),
g, gl		shape parameter,
h, hl		scale parameter,
n		number of load cycles,
nf		number of cycles until fatigue failure,
$\overline{n}$		mean number of load cycles,
$\overline{n_l}$		mean number of load cycles (in log space),
N		number of load cycles (random variable),
m		s-n curve material parameter,
σ		standard deviation,
σa		stress amplitude, MPa,
Pf		failure probability.