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.
An operational definition is a demonstration of a process-such as a variable, term, or object-relative in terms of the specific process or set of validation tests used to determine its presence and quantity.perational definitions are also used to define system states in terms of a specific, publicly accessible process of preparation or validation testing, which is repeatable at will. For example, 100 degrees Celsius may be crudely defined by describing the process of heating water until it is observed to boil.