a computer - aided lean management controller system recommends actions and manages production in an oil and gas reservoir / field as its properties and conditions change with time . the reservoir / field is characterized and represented as an electronic - field . a plurality of system applications describe dynamic and static e - field properties and conditions . the application workflows are integrated and combined in a feedback loop between actions taken in the field and metrics that score the success or failure of those actions . a controller / optimizer operates on the combination of the application workflows to compute production strategies and actions . the controller / optimizer is configured to generate a best action sequence for production , which is economically “ always - in - the - money .”