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

Spreadsheet bibliography

Title The wall and the ball: A study of domain referent spreadsheet errors
Authors Richard J. Irons
Year 2003
Type Proceedings
Publication EuSpRIG
Series  
Abstract

The Cell Error Rate in simple spreadsheets averages about 2% to 5%. This CER has been measured in domain free environments.

This paper compares the CERs occurring in domain free and applied domain tasks. The applied domain task requires the application of simple linear algebra to a costing problem.

The results show that domain referent knowledge influences participants' approaches to spreadsheet creation and spreadsheet usage. The conclusion is that spreadsheet error making is influenced by domain knowledge and domain perception.

Qualitative findings also suggest that spreadsheet error making is a part of overall human behaviour, and ought to be analyzed against this wider canvas.

Full version Available
Sample
Spreadsheet error analysis: Summary statistics
Spreadsheet error analysis: Summary statistics

The difference in the number of submitted Wall and Ball spreadsheets indicates that several participants found the Ball task simply 'too hard'.

Where both spreadsheets were submitted there was a difference in the number of errors between both tasks. However, this difference is not statistically significant.

Interestingly, only one participant completed both tasks correctly, whilst 8 participants got the Wall correct and the Ball wrong.

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