Response variables

Description

$A_r$

Rig availability (%)

$C_m$

Annual rig maintenance cost (?

Model parameters

$T_{PM}$

PM interval (Hours)

${\eta }_{rpl}$

Replace utilization (%)

${\eta }_{rpr}$

Repair utilization (%)

$L_{E_d}$

Number of day shift engineers

$L_{E_n}$

Number of night shift engineers

$L_{T_d}$

Number of day shift technicians

$L_{T_n}$

Number of night shift technicians