(1) operational efficiency ::
arụmọrụ arụmọrụ(2) operational expenses ::
arụmọrụ expenses(3) operational costs ::
arụmọrụ-akwụ ụgwọ(4) operational research ::
arụmọrụ research(5) operational planning ::
arụmọrụ atụmatụ(6) operational cost ::
arụmọrụ-eri(7) operational control ::
arụmọrụ akara(8) operational readiness ::
arụmọrụ readiness(9) operational procedures ::
arụmọrụ usoro