Table 4.

Optimal predictive maintenance strategy under different $c_e$ values.

${\mathit{c}}_{\mathit{e}}\left(\mathbf{k}\right)$	$\mathbf{Health}\mathbf{Risk}\mathbf{Threshold}\mathit{R}{\mathit{H}}_{\mathit{T}}$
2.00	39.068
3.50	46.384
4.00	47.000