Sigma: meaning, definitions and examples
๐ข
sigma
[ หsษชษกmษ ]
mathematics symbol
Sigma (ฮฃ, ฯ) is a letter of the Greek alphabet and represents a summation operator in mathematics. It is used primarily to indicate the sum of a sequence of numbers. The use of sigma in mathematical contexts often denotes the total or cumulative sum of a set of values, typically represented by a series. In addition to mathematics, sigma is also used in statistics to denote the standard deviation of a population. The uppercase form ฮฃ is frequently used in summation notation, while the lowercase form ฯ is used in various statistical formulas.
Synonyms
Examples of usage
- We calculated the total using the sigma notation.
- The sigma symbol represents the sum of the series.
- In statistics, sigma often indicates variation.
- The formula includes a sigma for clarity.
business term
In business contexts, sigma refers to a measure of quality or performance. The concept of Six Sigma is instrumental in quality management and process improvement methodologies. It aims to reduce defects and improve processes by identifying and removing causes of errors. Six Sigma utilizes various quality management tools and techniques to enhance overall efficiency. The term signifies striving for near perfection in processes.
Synonyms
performance measure, quality control
Examples of usage
- Our organization has adopted Six Sigma methodologies.
- He is a certified Six Sigma black belt.
- Six Sigma helps in minimizing defects.
- The project aims to achieve Sigma quality levels.
Translations
Translations of the word "sigma" in other languages:
๐ต๐น sigma
๐ฎ๐ณ เคธเคฟเคเฅเคฎเคพ
๐ฉ๐ช Sigma
๐ฎ๐ฉ sigma
๐บ๐ฆ ัะธะณะผะฐ
๐ต๐ฑ sigma
๐ฏ๐ต ใทใฐใ
๐ซ๐ท sigma
๐ช๐ธ sigma
๐น๐ท sigma
๐ฐ๐ท ์๊ทธ๋ง
๐ธ๐ฆ ุณูุบู ุง
๐จ๐ฟ sigma
๐ธ๐ฐ sigma
๐จ๐ณ ่ฅฟๆ ผ็
๐ธ๐ฎ sigma
๐ฎ๐ธ sigma
๐ฐ๐ฟ ัะธะณะผะฐ
๐ฌ๐ช แกแแแแ
๐ฆ๐ฟ sigma
๐ฒ๐ฝ sigma
Etymology
The term 'sigma' originates from the Greek alphabet, where it serves as the 18th letter. Its lower case form, 'ฯ', has historically been used in mathematics and statistics since ancient times. The letter has evolved into a symbol representing summation in mathematics during the late 19th century, largely due to the influence of mathematicians such as Leonhard Euler, who popularized its use. The application of 'sigma' in the realm of quality management emerged in the mid-20th century, particularly with the development of the Six Sigma methodology in the 1980s by Motorola. This approach focused on reducing defects and enhancing process efficiency across various industries. Over time, 'sigma' has taken on further significance in various fields, symbolizing not just mathematical concepts but diverse performance metrics in business and quality control.