How is productivity generally measured in construction?

Measuring productivity in construction often involves evaluating the efficiency and effectiveness of labor in relation to the budget and the actual work completed. The correct choice presents a formula that captures this relationship by comparing the actual man-hours worked to the man-hours budgeted, and then relating this to the work completed versus what was estimated.

This calculation gives a clear indication of how well the project is adhering to its planned productivity levels. It factors in both the cost (through man-hours) and the output (through quantities installed), which are critical for assessing overall performance. The result is a ratio that helps project managers understand whether they are over or under the expected productivity levels, allowing for better decision-making and adjustments if necessary.

In contrast, measuring productivity solely by project duration divided by labor hours does not give a comprehensive view of work efficiency. Similarly, the computation involving simply multiplying the number of workers by hours worked overlooks the vital relationship between hours and the quantity of work done. Finally, tracking the percentage of tasks completed by their deadlines does not effectively convey the same depth of labor productivity analysis as option B does, since it doesn't take into account the man-hours or budgeted amounts relative to actual performance.