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

Links about spreadsheets

Further information about spreadsheet best practice, errors, and testing:

  • Raymond Panko's spreadsheet research. Professor Panko is a leading researcher in the field of spreadsheet errors. His website is a repository for research on spreadsheet development, testing, use, and technology.
  • European Spreadsheet Risks Interest Group (EuSpRIG). An independent, authoritative and comprehensive source of information on the current state of the art in spreadsheet risk management.
  • Delft Spreadsheet Lab. Works on spreadsheet quality, design patterns, testing and refactoring. Part of the Software Engineering Research Group of the Delft University of Technology.
  • SpreadSheets as a Programming Paradigm (SSaaPP). Studies the foundations of spreadsheets from a software engineering perspective to improve the quality of spreadsheets.
  • Spreadsheet Engineering Research Project. Research project on spreadsheet development; procedures for implementing, modifying, sharing, and archiving spreadsheets; and organizational policies relating to standards, training and quality control.
  • End users shaping effective software (EUSES). Consortium of researchers seeking to develop and investigate end-user software engineering technologies to bring the benefits of rigorous software engineering methodologies to end users.

If you know of any other relevant links, then please contact us.

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