Table 2 Notations used in formulations m...

Table 2

Notations used in formulations

$m_{P} t$	Maintenance planning timeline in days
$M P d$	The date when maintenance plan is being developed (e.g. today)
${P M}_{0}$	The date when the last PM action was performed
$L$	Lookahead time in years
$N_{P M k}$	The number of PM actions performed over the maintenance timeline for a maintenance task of type k
$P M_{k}$	The PM interval of a maintenance task of type k
$P {M d}_{i k}$	The date for the ith occurrence of a maintenance task k over the maintenance timeline

Source(s): Authors’ own creation/work

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