No. | Source | Influence factors |
(1)
| Nature and environment
| Weather mutation Pests & diseases Soil environment incompatibility |
(2)
| Market and supply
| Mechanical failure Machine aging Incompatibility between agronomy and machine Operation order increasing Operation order cancelation Operation area change Operation location change Operation sequence change Operation time change Operation quality change Operation price change Operation duration change Driver illness Operation skill defects Material supply |
(3)
| Customer and behavior
| Miscommunication Customer barrier Unprofessional operation Mechanical maintenance delay |
(4)
| Society and economy
| Government compulsory policy Government fine Farm machinery subsidies change Unfair competition |
(5)
| Others
| Accident of road transportation Lost on the road Field location inaccurate |