Once you understand what success will take, you have a better understanding of how to manage your time and energy. The things that are measured are the things that get done. If you don't measure, you don't know how you are doing at reaching your desired productivity gains. Measures allow you to compare your current position against your desired position to make good business decisions, such as outsourcing or right-sizing. This is all a part of a continuous improvement program.
Productivity is the measure of what gets done.
Operational workers are those within an organization who work to accomplish a task that affects the bottom line. Typically that task is in support of the facilities operation's mission, which supports the mission of the parent company. Therefore, productivity is the measurement of the effectiveness and efficiency in accomplishing tasks to support the mission. Therefore, in measuring worker productivity by this definition, it is important to define an operational worker. An operational worker will be a worker whose tasks are directly related to what you are trying to measure.