Thames Tunnel The oldest underwater tunnel in the world. (0.4 km) (1825 - 1843). Severn Tunnel One of the oldest underwater tunnels in the world (3.62 km) (1873 - 1886). Chesapeake Bay Bridge Tunnel (23 miles (37 km)), connecting Virginia Beach with the Eastern Shore of Virginia (1960 - 1964).
Business Productivity is the ability of an organization to utilize its available resources in order to produce profitable goods or services as desired by customers or clients. It is the productivity that measures the performance of an organization...
In its most basic form, productivity is the measure of output versus input. In manufacturing, this relationship often takes the form of units produced compared to the number of man-hours required. The resulting ratio offers a measure of productivity, but it's only useful when you have a comparison or an expected value.