Table 6.
Dissatisfaction indicator and dissatisfaction degree in drilling task.
| Potential factors | Indicator | Perceived performance evaluation G | Importance evaluation Z | Difference G − Z | P | Dissatisfaction N |
|---|---|---|---|---|---|---|
| Physical environment | Less dust | 3.58 | 4.38 | − 0.800 | 0.000 | 0.183 |
| Good air quality | 3.38 | 4.28 | − 0.900 | 0.000 | 0.210 | |
| Bright light | 3.50 | 4.58 | − 1.075 | 0.000 | 0.236 | |
| Clean construction site | 3.35 | 4.03 | − 0.675 | 0.000 | 0.169 | |
| Convenient maintenance | Sufficient vulnerable parts | 3.65 | 4.45 | − 0.800 | 0.000 | 0.180 |
| Easy replacement of parts | 3.58 | 4.08 | − 0.500 | 0.001 | 0.123 | |
| Safety and health guarantee | Sufficient protective materials | 3.93 | 4.50 | − 0.575 | 0.001 | 0.127 |
| Injury report and timely treatment | 4.23 | 4.65 | − 0.425 | 0.008 | 0.090 | |
| Personnel organization efficiency | Operation training | 3.90 | 4.40 | − 0.500 | 0.001 | 0.114 |
| Clear assignment of tasks | 3.98 | 4.40 | − 0.425 | 0.003 | 0.095 | |
| Availability of spare tools | Intact function and appearance | 4.18 | 4.43 | − 0.250 | 0.04 | 0.056 |
| Equipment types sufficient | 3.90 | 4.38 | − 0.475 | 0.000 | 0.110 | |
| Man–tool matching | Manual aided design | 3.69 | 4.10 | − 0.410 | 0.01 | 0.100 |
Means P < 0.05 indicates that the difference between G and Z is significant.