The correct option is D. Lower the quality of the materials used is the other way to increase productivity.
By comparing the quantity of goods and services produced (output) with the quantity of inputs required to generate those goods and services, productivity is a measure of economic performance.
Productivity is a measure of how effectively commodities or services are produced. Productivity is sometimes represented as a ratio of the whole output to a single input or the total input used in a production process, or output per unit of input, usually over a predetermined time period.
Workplace productivity relates to the amount of work that your staff can produce over a certain period. In other words, it's the measure of the total output (goods and services) versus the total input (labor and costs).
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