The untested spreadsheet is as dangerous and untrustworthy as an untested program.
Price (2006)
Despite being staggeringly error prone, spreadsheets are a highly flexible programming environment.
Abreu, et al (2015)
Programmers exhibit unwarranted confidence in the correctness of their spreadsheets.
Krishna, et al (2001)
Errors in spreadsheets... result in incorrect decisions being made and significant losses incurred.
Beaman, et al (2005)
It is irrational to expect large error-free spreadsheets.
Panko (2013)
Most executives do not really check or verify the accuracy or validity of [their] spreadsheets...
Teo & Tan (1999)
Spreadsheets are commonly used and commonly flawed.
Caulkins, Morrison, & Weidemann (2008)
Developing an error-free spreadsheet has been a problem since the beginning of end-user computing.
Mireault (2015)
Every study, without exception, has found error rates much higher than organizations would wish to tolerate.
Panko (1999)
A significant proportion of spreadsheets have severe quality problems.
Ayalew (2007)
People tend to believe their spreadsheets are more accurate than they really are.
Caulkins, Morrison, & Weidemann (2006)
Spreadsheets contain errors at an alarmingly high rate.
Abraham, et al (2005)
Your spreadsheets may be disasters in the making.
Caulkins, Morrison, & Weidemann (2006)
Spreadsheet errors are pervasive, stubborn, ubiquitous and complex.
Irons (2003)
Despite overwhelming and unanimous evidence... companies have continued to ignore spreadsheet error risks.
Panko (2014)
Spreadsheets are easy to use and very hard to check.
Chen & Chan (2000)
Spreadsheets... pose a greater threat to your business than almost anything you can imagine.
Howard (2005)
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)
Research on spreadsheet errors is substantial, compelling, and unanimous.
Panko (2015)
Studies have shown that there is a high incidence of errors in spreadsheets.
Csernoch & Biro (2013)
Overconfidence is one of the most substantial causes of spreadsheet errors.
Sakal, et al (2015)
60% of large companies feel 'Spreadsheet Hell' describes their reliance on spreadsheets.
Murphy (2007)
Spreadsheet shortcomings can significantly hamper an organization's business operation.
Reschenhofer & Matthes (2015)
Spreadsheets have a notoriously high number of faults.
Rust, et al (2006)
Every study that has looked for errors has found them... in considerable abundance.
Panko & Halverson (1996)
Most large spreadsheets have dozens or even hundreds of errors.
Panko & Ordway (2005)
Spreadsheet errors have resulted in huge financial losses.
Abraham & Erwig (2007)
Spreadsheet errors are still the rule rather than the exception.
Nixon & O'Hara (2010)
The software that end users are creating... is riddled with errors.
Burnett & Myers (2014)
Untested spreadsheets are riddled with errors.
Miller (2005)
Spreadsheets are more fault-prone than other software.
Kulesz & Ostberg (2013)
Spreadsheets are the most popular live programming environments, but they are also notoriously fault-prone.
Hermans & van der Storm (2015)
Spreadsheet development must embrace extensive testing in order to be taken seriously as a profession.
Bock (2016)
Even obvious, elementary errors in very simple, clearly documented spreadsheets are... difficult to find.
Galletta, et al (1993)
Errors in spreadsheets are as ubiquitous as spreadsheets themselves.
Colbenz (2005)
It is now widely accepted that errors in spreadsheets are both common and potentially dangerous.
Nixon & O'Hara (2010)
Spreadsheets can be viewed as a highly flexible programming environment for end users.
Abreu, et al (2015)
Spreadsheets are alarmingly error-prone to write.
Paine (2001)
Spreadsheets are dangerous to their authors and others.
Durusau & Hunting (2015)
A lot of decisions are being made on the basis of some bad numbers.
Ross (1996)
1% of all formulas in operational spreadsheets are in error.
Powell, Baker, & Lawson (2009)
The quality and reliability of spreadsheets is known to be poor.
Bishop & McDaid (2007)
Spreadsheets are often hard, if not impossible, to understand.
Mireault & Gresham (2015)
...few incidents of spreadsheet errors are made public and these are usually not revealed by choice.
Kruck & Sheetz (2001)
Spreadsheets are notoriously error-prone.
Cunha, et al (2011)
Spreadsheet errors... a great, often unrecognised, risk to corporate decision making & financial integrity.
Chadwick (2002)
The issue is not whether there is an error but how many errors there are and how serious they are.
Panko (2007)
The results given by spreadsheets are often just wrong.
Sajaniemi (1998)
Spreadsheets are extraordinarily and unacceptably prone to error.
Dunn (2010)

Resources

 Resources available on this website include:

  • What's new, a list of recent items added to this website.
  • 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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