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...
1 Productivity is not the same as production. 2  Productivity growth may occur even when output (production) remains the same. 3  It is also not a measure of competitiveness or profitability. 4  Finally, productivity is not a complete performance management tool.