Maintainability Analysis of Underground Mining Equipment Using Genetic Algorithms: Case Studies with an LHD Vehicle

Table 2

Delay data overview in the periods from January to March 2006 and from October to December 2006.

Failure type	January–March 2006			October–December 2006
	Time	Frequency	Percent age (%)	Time	Frequency	Percent age (%)
AV	6.3	3	1.06	56.6	10	14.37
ME	6	2	1.01	40.7	5	10.34
MH	78.1	12	13.13	4	1	1.02
MM	389	42	65.42	4.5	1	1.14
MP	107.2	10	18.03	208	19	52.82
OW	8	1	1.35	80	8	20.31
Total	594.6	70	100	393.8	44	100

AV: available. ME: electrical down. MH: hydraulic down.
MM: mechanical down. MP: planned maintenance. OW: other.