Effectiveness is the capability of producing a desired result or the ability to produce desired output. It is focused on the extent to which work is done and the end result achieved.

The term efficiency can be defined as the ability to achieve an end goal with little to no waste, effort, or energy. Efficiency measures the level of performance achieved against a standard. A high level of efficiency generates the highest possible amount of outputs with the smallest amount of inputs.

Productivity is the efficiency of production of goods or services expressed by some measure. Productivity is a measure of performance that compares the output of a product with the input, or resources, required to produce it. The input may be labor, equipment, or money. 

Throughput, in business, is the amount of a product or service that a company can produce and deliver to a client within a specified period of time. The term is often used in the context of a company's rate of production or the speed at which something is processed.

System Loss means loss, theft, damage or destruction of the system or any portion or any other occurrence or event that prevents or limits the system from operating in whole or in part, resulting from or arising out of any cause. In electricity, system loss is the difference between the electric energy delivered to the distribution system and the energy delivered to the end-users and other entities connected to the system.