1 Largest natural gas producers worldwide based on production output in Q2 2016 (in billion cubic feet per day)*Global natural gas largest producing companies 2016. 2  2017 ranking of the leading global oil and gas companies based on revenue (in billion U.S. dollars)2017 global list of the top oil and gas companies based on revenue.
Operational Definition â A definition in terms of the operations used to produce and measure a phenomenon. It is important to define a behavior in clear and concise terms so that it can be accurately measured, assessed and treated by a number of individuals across a variety of environments.perational Definition â A definition in terms of the operations used to produce and measure a phenomenon. It is important to define a behavior in clear and concise terms so that it can be accurately measured, assessed and treated by a number of individuals across a variety of environments.
For example, the weight of an object may be operationally defined by describing the operations of using a balance and standard weights. (Note that it is not the specific weight of the specific object which is operationally defined, but the process for arriving at it.his is especially so in the sciences, where most (if not all) formal definitions (as distinct from arbitrary naming) must be operational definitions or traceable to operational definitions. Operational definitions are particularly important in the physical sciences.