6. Efficiency

In computer science terms efficiency is the ratio of useful work to resources (processor and storage) expended. In other words, the ratio of the output to the input of a given system. If for example an algorithm is said to be efficient, it does a good job of economising on the computer resources to achieve its objective.



In HCI or Usability terms, efficiency is measured as the resources expended by the user in relation to the accuracy and completeness of goals achieved (ISO standard 9241). High efficiency is achieved when the user reaches his/her goals while expending as few resources as possible according to the mentioned ISO standard. This definition is however very business-oriented and only partly applies to software such as games or likewise.

Chapter TOC

Open Access - Link to us!

We believe in Open Access and the democratization of knowledge. Unfortunately, world class educational materials such as this page are normally hidden behind paywalls or in expensive textbooks.

If you want this to change, , link to us, or join us to help us democratize design knowledge!