▁virt ually ▁all ▁occup ations . ▁The ▁major ▁categories ▁of ▁items ▁are ▁five - fold : ▁▁ ▁Information ▁Rece ived ▁ ▁M ental ▁Activ ities ▁ ▁Work ▁Be havior ▁ ▁Work ▁Go als ▁ ▁Work ▁Context ▁O AI ▁respond ents ▁rate ▁each ▁job ▁element ▁on ▁one ▁of ▁four ▁rating ▁scales : ▁part - of - job , ▁extent , ▁applic ability , ▁or ▁a ▁special ▁scale ▁designed ▁for ▁the ▁element . ▁The ▁O AI ▁has ▁been ▁used ▁to ▁gather ▁information ▁on ▁ 1 , 4 0 0 ▁jobs ▁selected ▁to ▁represent ▁five ▁major ▁occup ational ▁categories . ▁R eli abilities ▁obtained ▁with ▁the ▁O AI ▁have ▁been ▁moder ate , ▁somewhat ▁lower ▁than ▁those ▁achieved ▁with ▁the ▁PA Q ”. ▁ ▁Function al ▁job ▁analysis ▁Job ▁analysis ▁as ▁a ▁management ▁technique ▁was ▁developed ▁around ▁ 1 9 0 0 . ▁It ▁became ▁one ▁of ▁the ▁tools ▁by ▁which ▁man agers ▁understood ▁and ▁directed ▁organization ▁the ▁website ’ s ▁find ings ▁state , ▁“ Begin ning ▁in ▁the ▁ 1 9 4 0 s , ▁functional ▁job ▁analysis ▁( F J A ) ▁was ▁used ▁by ▁U . S . ▁Emp loyment ▁Service ▁job ▁anal yst s ▁to ▁class ify ▁jobs ▁for ▁the ▁D OT ▁( F ine ▁& ▁W iley , ▁ 1 9 7 1 ). ▁The ▁most ▁recent ▁version ▁of ▁F J A ▁uses ▁seven ▁scales ▁to ▁describe ▁what ▁workers ▁do ▁in ▁jobs : ▁▁ ▁Things ▁ ▁Data ▁ ▁People ▁ ▁Work er ▁Inst ru ctions ▁ ▁Re ason ing ▁