1. Duba ga Lalacewa:
Bincika duk wani lahani da wataƙila ya faru yayin sufuri, kamar ga casing, gilashin zafi, ko murfin gilashi.
2. Takaddun shaida da Takaddun shaida:
Tabbatar an haɗa littafin umarnin samfurin da takaddun shaida na fashewa a cikin akwatin marufi.