Spreadsheet errors are pervasive, stubborn, ubiquitous and complex.
Irons (2003)
Never assume a spreadsheet is right, even your own.
Raffensperger (2001)
94% of the 88 spreadsheets audited in 7 studies have contained errors.
Panko (2008)
The software that end users are creating... is riddled with errors.
Burnett & Myers (2014)
Every study, without exception, has found error rates much higher than organizations would wish to tolerate.
Panko (1999)
Research on spreadsheet errors is substantial, compelling, and unanimous.
Panko (2015)
Spreadsheets have a notoriously high number of faults.
Rust, et al (2006)
Spreadsheet errors have resulted in huge financial losses.
Abraham & Erwig (2007)
Spreadsheets are dangerous to their authors and others.
Durusau & Hunting (2015)
Studies have shown that there is a high incidence of errors in spreadsheets.
Csernoch & Biro (2013)
Errors in spreadsheets... result in incorrect decisions being made and significant losses incurred.
Beaman, et al (2005)
Spreadsheets are often hard, if not impossible, to understand.
Mireault & Gresham (2015)
Spreadsheet shortcomings can significantly hamper an organization's business operation.
Reschenhofer & Matthes (2015)
Spreadsheets are extraordinarily and unacceptably prone to error.
Dunn (2010)
Spreadsheets are alarmingly error-prone to write.
Paine (2001)
It is now widely accepted that errors in spreadsheets are both common and potentially dangerous.
Nixon & O'Hara (2010)
It is irrational to expect large error-free spreadsheets.
Panko (2013)
Spreadsheets are the most popular live programming environments, but they are also notoriously fault-prone.
Hermans & van der Storm (2015)
Even obvious, elementary errors in very simple, clearly documented spreadsheets are... difficult to find.
Galletta, et al (1993)
Your spreadsheets may be disasters in the making.
Caulkins, Morrison, & Weidemann (2006)
Every study that has looked for errors has found them... in considerable abundance.
Panko & Halverson (1996)
A significant proportion of spreadsheets have severe quality problems.
Ayalew (2007)
Spreadsheets are more fault-prone than other software.
Kulesz & Ostberg (2013)
...few incidents of spreadsheet errors are made public and these are usually not revealed by choice.
Kruck & Sheetz (2001)
Spreadsheet errors are still the rule rather than the exception.
Nixon & O'Hara (2010)
1% of all formulas in operational spreadsheets are in error.
Powell, Baker, & Lawson (2009)
People tend to believe their spreadsheets are more accurate than they really are.
Caulkins, Morrison, & Weidemann (2006)
The quality and reliability of spreadsheets is known to be poor.
Bishop & McDaid (2007)
Errors in spreadsheets are as ubiquitous as spreadsheets themselves.
Colbenz (2005)
Despite being staggeringly error prone, spreadsheets are a highly flexible programming environment.
Abreu, et al (2015)
Untested spreadsheets are riddled with errors.
Miller (2005)
The results given by spreadsheets are often just wrong.
Sajaniemi (1998)
Spreadsheets are commonly used and commonly flawed.
Caulkins, Morrison, & Weidemann (2008)
Most large spreadsheets have dozens or even hundreds of errors.
Panko & Ordway (2005)
Spreadsheet errors... a great, often unrecognised, risk to corporate decision making & financial integrity.
Chadwick (2002)
Spreadsheets contain errors at an alarmingly high rate.
Abraham, et al (2005)
Spreadsheets are easy to use and very hard to check.
Chen & Chan (2000)
Developing an error-free spreadsheet has been a problem since the beginning of end-user computing.
Mireault (2015)
A lot of decisions are being made on the basis of some bad numbers.
Ross (1996)
The untested spreadsheet is as dangerous and untrustworthy as an untested program.
Price (2006)
Overconfidence is one of the most substantial causes of spreadsheet errors.
Sakal, et al (2015)
The issue is not whether there is an error but how many errors there are and how serious they are.
Panko (2007)
Most executives do not really check or verify the accuracy or validity of [their] spreadsheets...
Teo & Tan (1999)
Spreadsheets can be viewed as a highly flexible programming environment for end users.
Abreu, et al (2015)
Spreadsheets are notoriously error-prone.
Cunha, et al (2011)
Spreadsheet development must embrace extensive testing in order to be taken seriously as a profession.
Bock (2016)
Spreadsheets... pose a greater threat to your business than almost anything you can imagine.
Howard (2005)
Despite overwhelming and unanimous evidence... companies have continued to ignore spreadsheet error risks.
Panko (2014)
60% of large companies feel 'Spreadsheet Hell' describes their reliance on spreadsheets.
Murphy (2007)
Programmers exhibit unwarranted confidence in the correctness of their spreadsheets.
Krishna, et al (2001)

Spreadsheet bibliography

Title Only a matter of time before the spreadsheets hit the fan
Authors Robert Miller
Year 2005
Type Newspaper article
Publication The Telegraph
Series 30 June 2005
Abstract Inaccurate financial information is widespread and is putting businesses at risk.
Full version Available
Sample
Spreadsheets are ubiquitous and almost certainty contain errors

Even the simplest spreadsheet calculations in a company are not tested independently for accuracy and the probability of material error is way over 90pc.

"It's very worrying. Untested spreadsheets are riddled with errors very often because the incorrect formula has been entered in the first place."

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