JEL-400 mndandanda akupanga mlingo mita ndi sanali kukhudzana, otsika mtengo komanso yosavuta kukhazikitsa mlingo n'zotsimikizira.Imagwiritsa ntchito ukadaulo wapamwamba wazamlengalenga kumakampani azamoyo.Mosiyana wamba mlingo gauges, akupanga mlingo gauges zambiri zoletsa.Zogulitsazo zimakhala zolimba komanso zolimba, zosavuta maonekedwe, zosakwatiwa komanso zodalirika pakugwira ntchito.