Manufacturing Error Rate
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across studies. However only fairly simple actions are used in the denominator. The Klemmer and Snyder study shows that much lower error rates are possible--in this case average human error rate for people whose job consisted almost entirely of data entry. The error rate for human error rate in data entry more complex logic errors is about 5%, based primarily on data on other pages, especially the program development page. human error rate prediction Study Detail Error Rate Baddeley & Longman [1973] Entering mail codes. Errors after correction. Per mail code. 0.5% Chedru & Geschwind [1972] Grammatical errors per word 1.1% Dhillon [1986] Reading a gauge human error probability table incorrectly. Per read. 0.5% Dremen and Berry [1995] Percentage error in security analysts' earnings forecasts for reporting earnings. 1980 / 1985 / 1990. That is, size of error rather than frequency of error. 30% 52% 65% Edmondson [1996] Errors per medication in hospital, based on data presented in the paper. Per dose. 1.6% Grudin [1983] Error rate per keystroke for six expert typists. Told not to correct errors,
Acceptable Error Rate Six Sigma
although some did. Per keystroke. 1% Hotopf [1980] S sample (speech errors). Per word 0.2% Hotopf [1980] W sample (written exam). Per word 0.9% Hotopf [1980] 10 undergraduates write for 30 minutes, grammatical and spelling errors per word 1.6% Klemmer [1962] Keypunch machine operators, errors per character 0.02% to 0.06% Klemmer [1962] Bank machine operators, errors per check 0.03% Kukich [1992] Nonword spelling errors in uses of telecommunication devices for the deaf. 40,000 words (strings). Per string. 6% Mathias, MacKenzie & Buxton [1996] 10 touch typists averaging 58 words per minute. No error correction. In last session. Per keystroke. 4% Mattson & Baars [1992] Typing study with secretaries and clerks. Nonsense words. Per nonsense word. 7.4% Melchers & Harrington [1982] Students performing calculator tasks and table lookup tasks. Per multipart calculation. Per table lookup. Etc. 1%-2% Mitton [1987] Study of 170,016 errors in high-school essays, spelling errors. Per word. 2.4% Potter [1995] Errors in making entries in an aircraft flight management system. Per keystroke. Higher if heavy workload. 10.0% Rabbit [1990] Flash one of two letters on display screen. Subject hits one of two keys in response. After correction. Per choice. 0.6% Schoonard & Boies [1975] Line-oriented text editor. E
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How To Calculate Human Error Percent
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