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

Resources

Resources available on this website include:

  • What's new, a list of recent items added to this website.
  • Risk quiz, a questionnaire that calculates a spreadsheet's level of risk.
  • Connexion, a collection of the most useful and interesting spreadsheet-related articles from the web.
  • Bibliography of the literature about spreadsheet best practice, errors, and testing.
  • Our blog about spreadsheet tips, techniques, best practice, and testing.
  • Methodology for testing spreadsheets to find and correct errors.
  • FAQ about this website.
  • Links to other websites about spreadsheets.
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