Explain the concept behind the measures of Process Efficiency:

$1\mathrm{.}1.$  Efficiency

$1\mathrm{.}2.$ Costs of direct labor

$1\mathrm{.}3.$ Labor Content

$1\mathrm{.}4.$ Average Labor Utilization

$1\mathrm{.}5.$ Idle Time

$1\mathrm{.}6.$ Total Idle Time