Efficiency is the percentage of effort or resources that produces a result. It is the opposite of waste. The following are illustrative examples.
Energy EfficiencyA standard incandescent light bulb converts about about 2% of its energy consumption to light and 98% to heat. In an air conditioned room in a hot climate, this is quite inefficient.
Work EfficiencyUnder ideal conditions, a particular programmer can write about 1000 lines of code in a day. One day, the programmer works from home and watches a few movies as she works. She produces only 100 lines of code. This represents efficiency of 10%. When she goes to the office efficiency drops to 7% due to meetings, commuting time and socialization with coworkers.
Process EfficiencyAn ideal process can set up a customer's bank account for $20. The actual process costs $100. Waste is 80% and efficiency is 20%.
Solar PanelsA particular solar module can convert 20% of available solar energy to electricity under ideal conditions.
Device EfficiencyA pair of speakers use 50% of the energy they consume to generate sound.
VehiclesAn electric vehicle directs about 60% of its energy consumption to its wheels.
|Definition (1)||The percentage of effort that produces a result.|
|Definition (2)||The percentage of resource potential that is utilized to produce a result.|
|Definition (3)||The percentage of resource potential that is not wasted.|
|Related Concepts||Efficiency vs ProductivityJevon's Paradox|
This is the complete list of articles we have written about sustainability.
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An overview of the precautionary principle.
A definition of comparative risk with examples.
The common types of energy efficiency.
The definition of external stakeholder with examples.
Common examples of an economic bad.
The definition of win-lose with examples.
The basics of productivity.
An overview of flow.
The difference between efficiency and productivity.
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A definition of bottleneck with several business examples.
How to calculate productivity with 3 examples.
The definition of productivity improvement with examples.
The formula for productivity rate with calculation examples.
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