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

Spreadsheet bibliography

Title Structured spreadsheet modeling and implementation
Authors Paul Mireault
Year 2015
Type Proceedings
Publication Software Engineering Methods in Spreadsheets
Series May
Abstract

Developing an error-free spreadsheet has been a problem since the beginning of end-user computing.

In this paper, we present a methodology that separates the modeling from the implementation. Using proven techniques from Information Systems and Software Engineering, we present strict, but simple, rules governing the implementation from the model.

The resulting spreadsheet should be easier to understand, audit and maintain.

Full version Available
Sample
Typical structured spreadsheet modeling process
Typical structured spreadsheet modeling process
The structured methodology is based on a separation of tasks to produce three models: Formula Diagram (conceptual model), Formula List (logical model), and the actual spreadsheet (physical model). Errors may be introduced at each stage.
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