. . "operational terms" . "operational definitions" . "measurement" . . . "operational definition" . "problem" . "operationalize" . "defined operationally" . . "Operational definition" . "operationally defined" . "An operational definition" . . "define" . "operationalizing" . . . "operationally" . "operationalizing the definitions" . . "Operational definition" . . "operationally define" . "operation" . "background" . "calibration" . "operationalization" . "operations" . . "operationalise" . "Operational Definition" . "operational meaning" . "operational" . "defining flatness operationally" .