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

Twenty principles for good spreadsheet practice

17 November 2013

There have been countless posts on IT Counts and the Excel Community about the risks of poorly designed spreadsheets and the time that can be wasted by inefficient use of spreadsheets.

The IT Faculty is publishing what we hope will be a major contribution towards addressing those problems, and now is your chance to improve our 'public consultation draft', by providing feedback here.

Over the past several months a dozen or so 'spreadsheet gurus' – the term is meant as a compliment ­– have been debating what ought to be our 'Twenty Principles of Good Spreadsheet Practice'.

So this posting is part of our 'public exposure' of the Spreadsheet Principles. Comments and suggestions for improvement are welcome!

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