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What (who) is productivity class - definition
![Labour productivity levels in 2012 in Europe. [[OECD]]](https://commons.wikimedia.org/wiki/Special:FilePath/Labour productivity levels in europe.svg?width=200 "Labour productivity levels in 2012 in Europe. [[OECD]]")
![Comparison of average labour productivity levels between the [[OECD]] member states. Productivity is measured as GDP per hour worked. Blue bars = higher than OECD-average productivity. Yellow bars = lower than average.](https://commons.wikimedia.org/wiki/Special:FilePath/OECD Productivity levels 2007.svg?width=200 "Comparison of average labour productivity levels between the [[OECD]] member states. Productivity is measured as GDP per hour worked. Blue bars = higher than OECD-average productivity. Yellow bars = lower than average.")
![Adriance]] reaper, late 19th century](https://commons.wikimedia.org/wiki/Special:FilePath/Adriance reaper, 19th century illustration.jpg?width=200 "Adriance]] reaper, late 19th century")
![U.S. airman]] operating a forklift. Pallets placed in rear of truck are moved around inside with a pallet jack (below). Where available pallets are loaded at [[loading dock]]s which allow forklifts to drive on.](https://commons.wikimedia.org/wiki/Special:FilePath/Airforce forklift.jpg?width=200 "U.S. airman]] operating a forklift. Pallets placed in rear of truck are moved around inside with a pallet jack (below). Where available pallets are loaded at [[loading dock]]s which allow forklifts to drive on.")
![Threshing machine from 1881. Steam engines were also used instead of horses. Today both threshing and reaping are done with a [[combine harvester]].](https://commons.wikimedia.org/wiki/Special:FilePath/Batteuse 1881.jpg?width=200 "Threshing machine from 1881. Steam engines were also used instead of horses. Today both threshing and reaping are done with a [[combine harvester]].")
![Harvesting oats in a [[Claas]] Lexion 570 combine with enclosed, air-conditioned cab with rotary thresher and laser-guided hydraulic steering](https://commons.wikimedia.org/wiki/Special:FilePath/Claas-lexion-570-1.jpg?width=200 "Harvesting oats in a [[Claas]] Lexion 570 combine with enclosed, air-conditioned cab with rotary thresher and laser-guided hydraulic steering")
![A set of six-axis robots used for [[welding]]. Robots are commonly used for hazardous jobs like paint spraying, and for repetitive jobs requiring high precision such as welding and the assembly and soldering of electronics like car radios.](https://commons.wikimedia.org/wiki/Special:FilePath/FANUC 6-axis welding robots.jpg?width=200 "A set of six-axis robots used for [[welding]]. Robots are commonly used for hazardous jobs like paint spraying, and for repetitive jobs requiring high precision such as welding and the assembly and soldering of electronics like car radios.")
![The concept of the feedback loop to control the dynamic behavior of the system: this is negative feedback, because the sensed value is subtracted from the desired value to create the error signal, which is processed by the controller, which provides proper corrective action. A typical example would be to control the opening of a valve to hold a liquid level in a tank. [[Process control]] is a widely used form of automation. See also: [[PID controller]]](https://commons.wikimedia.org/wiki/Special:FilePath/Feedback loop with descriptions.svg?width=200 "The concept of the feedback loop to control the dynamic behavior of the system: this is negative feedback, because the sensed value is subtracted from the desired value to create the error signal, which is processed by the controller, which provides proper corrective action. A typical example would be to control the opening of a valve to hold a liquid level in a tank. [[Process control]] is a widely used form of automation. See also: [[PID controller]]")
 NT.PNG?width=200 "Vertical milling machine, an important '''machine tool'''. 1: milling cutter 2: spindle 3: top slide or overarm 4: column 5: table 6: Y-axis slide 7: knee 8: base")
![The handle on this [[pumpjack]] is the lever for a hydraulic jack, which can easily lift loads up to 2-1/2 tonnes, depending on rating. Commonly used in warehouses and in retail stores.](https://commons.wikimedia.org/wiki/Special:FilePath/Pompwagen.jpg?width=200 "The handle on this [[pumpjack]] is the lever for a hydraulic jack, which can easily lift loads up to 2-1/2 tonnes, depending on rating. Commonly used in warehouses and in retail stores.")
Wikipedia
Productivity is the efficiency of production of goods or services expressed by some measure. Measurements of productivity are often expressed as a ratio of an aggregate output to a single input or an aggregate input used in a production process, i.e. output per unit of input, typically over a specific period of time. The most common example is the (aggregate) labour productivity measure, one example of which is GDP per worker. There are many different definitions of productivity (including those that are not defined as ratios of output to input) and the choice among them depends on the purpose of the productivity measurement and data availability. The key source of difference between various productivity measures is also usually related (directly or indirectly) to how the outputs and the inputs are aggregated to obtain such a ratio-type measure of productivity.
Productivity is a crucial factor in the production performance of firms and nations. Increasing national productivity can raise living standards because more real income improves people's ability to purchase goods and services, enjoy leisure, improve housing, and education and contribute to social and environmental programs. Productivity growth can also help businesses to be more profitable.
