" operational "

[Adjective]  | "op*er*a*tion*al" | \ ˌä-pə-ˈrā-sh(ə-)nəl \

1: of or relating to operation or to an operation

2: of, relating to, or based on operations

3: of, engaged in, or connected with execution of military or naval operations in campaign or battle

Origin: 1885 ;

 {see: |operation|operation} + {see: |-al:1|-al:1};

[Adjective]  | "pre*op*er*a*tion*al" | \ ˌprē-ˌä-pə-ˈrā-sh(ə-)nəl \

1: of, relating to, or being the stage of cognitive development according to Jean Piaget's theory in which thought is egocentric and intuitive and not yet logical or capable of performing mental tasks

Origin: 1951 ;

[Noun]  | "operations research" 

1: the application of scientific and especially mathematical methods to the study and analysis of problems involving complex systems —called also operational research

Origin: 1943 ;

[Adjective]  | "operational"