Table 1 Results of statistical analysis of the collected downtime data of each shovel.
From: Development of a new method for maintainability and downtime analysis of mining machinery
Shovel code | Number of recorded failures | Average downtime (h) | Best-fitted statistical distribution | Probability density function parameters |
|---|---|---|---|---|
SH01 | 146 | 10.9 | Lognormal | \(\:\mu\:=0.1063\:,\:{\upsigma\:}=1.5\) |
SH02 | 310 | 4.1 | Lognormal | \(\:\mu\:=0.1467\:,\:{\upsigma\:}=1.342\) |
SH03 | 203 | 18.9 | Lognormal | \(\:\mu\:=0.4145\:,\:{\upsigma\:}=1.612\) |
SH04 | 171 | 2.7 | Weibull 2P | α=\(\:0.8298,\:\beta\:=1.484\) |
SH05 | 390 | 4.3 | Lognormal | \(\:\mu\:=0.0232\:,\:{\upsigma\:}=1.22\) |
SH06 | 344 | 5.4 | Lognormal | \(\:\mu\:=0.0183\:,\:{\upsigma\:}=1.356\) |
SH07 | 146 | 5.9 | Weibull 2P | α=\(\:0.6615,\:\beta\:=2.373\) |
SH08 | 358 | 2 | Log-normal | \(\:\mu\:=0.161\:,\:{\upsigma\:}=1.101\) |
SH09 | 299 | 2.8 | Log-normal | \(\:\mu\:=0.0022\:,\:{\upsigma\:}=1.243\) |
SH10 | 209 | 4.5 | Weibull 2P | α=\(\:0.8056,\:\beta\:=1.243\) |
