Productivity is a measure of efficiency in converting inputs into outputs. The most common formula for productivity is the ratio of output to input, i.e., Output/Input. However, in some specific cases, a broader measure may involve both input and output, reflecting a more comprehensive analysis of productivity.
Option (D) considers the ratio of the sum of both input and output to output. This formula accounts for the entire system and allows for the assessment of both aspects. It provides a holistic approach to measuring productivity, which is especially useful in processes where both input and output matter.
In practical scenarios, the calculation of productivity might differ depending on the context, but the goal remains to assess the effectiveness of resources used to generate results.