Table 8.
Identified covariates for failure and repair database
| Database | Subsystem | Identified covariates | Category (Score) | |||||
|---|---|---|---|---|---|---|---|---|
| Failure database | Lo | v1 | Shift | Morning (0) | Afternoon (1) | Night (2) | ||
| v2 | Working place | Dump (0) | Mining face (1) | |||||
| v3 | Proportion with truck | Suitable (0) | Partly suitable (1) | Unsuitable (2) | ||||
| v4 | Weather condition | Sunny (1) | Semi cloudy (2) | Cloudy (3) | Dense fog (4) | |||
| v5 | Precipitate | Continuous covariate | ||||||
| v6 | Temperature | Continuous covariate | ||||||
| v7 | Road condition | Normal (0) | Abnormal (1) | |||||
| v8 | Number of service | Good (1) | Moderate (2) | Bad (3) | ||||
| v9 | Rock fragmentation | Ore, dump (0) | Middle-Monzonite (1) | North-Monzonite (2) | Trachyte (3) | South-Monzonite (4) | ||
| v10 | Rock kind | Ore (0) | Monzonite (1) | Trachyte (2) | ||||
| DTs | v1′ | Shift | Morning (0) | Afternoon (1) | Night (2) | |||
| v2′ | Number of service | Good (1) | Moderate (2) | Bad (3) | ||||
| v3′ | Proportion with loader | Suitable (0) | Partly suitable (1) | Unsuitable (2) | ||||
| v4′ | Rock fragmentation | Ore, oxide, dump (0) | Middle-Monzonite (1) | North-Monzonite (2) | Trachyte (3) | South-Monzonite (4) | ||
| v5′ | Slope of road | Same level (0) | Down (1) | Up (2) | ||||
| v6′ | Weather condition | Sunny (1) | Semi cloudy (2) | Cloudy (3) | Dense fog (4) | |||
| v7′ | Precipitate | Continuous covariate | ||||||
| v8′ | Temperature | Continuous covariate | ||||||
| v9′ | Road condition | Normal (0) | Abnormal (1) | |||||
| v10′ | Rock kind | Ore (0) | Monzonite (1) | Trachyte (2) | ||||
| v11′ | Hauling distance | Short (0) | Normal (1) | Long (2) | ||||
| Lo. and DTs | z1 | Shift | Morning (0) | Afternoon (1) | Night (2) | |||
| Repair database | z2 | Involved maintenance crew | One (0) | More than one (1) | ||||
| z3 | Weather condition | Sunny (1) | Semi cloudy (2) | Cloudy (3) | Dense fog (4) | |||
| z4 | Precipitate | Continuous covariate | ||||||
| z5 | Temperature | Continuous covariate | ||||||