Research on spreadsheet errors is substantial, compelling, and unanimous.
Panko (2015)
Spreadsheet errors... a great, often unrecognised, risk to corporate decision making & financial integrity.
Chadwick (2002)
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)
60% of large companies feel 'Spreadsheet Hell' describes their reliance on spreadsheets.
Murphy (2007)
The quality and reliability of spreadsheets is known to be poor.
Bishop & McDaid (2007)
The software that end users are creating... is riddled with errors.
Burnett & Myers (2014)
Despite overwhelming and unanimous evidence... companies have continued to ignore spreadsheet error risks.
Panko (2014)
A lot of decisions are being made on the basis of some bad numbers.
Ross (1996)
Spreadsheets have a notoriously high number of faults.
Rust, et al (2006)
Errors in spreadsheets are as ubiquitous as spreadsheets themselves.
Colbenz (2005)
Spreadsheets are easy to use and very hard to check.
Chen & Chan (2000)
Every study, without exception, has found error rates much higher than organizations would wish to tolerate.
Panko (1999)
1% of all formulas in operational spreadsheets are in error.
Powell, Baker, & Lawson (2009)
Spreadsheets are often hard, if not impossible, to understand.
Mireault & Gresham (2015)
Most executives do not really check or verify the accuracy or validity of [their] spreadsheets...
Teo & Tan (1999)
Spreadsheets are the most popular live programming environments, but they are also notoriously fault-prone.
Hermans & van der Storm (2015)
The issue is not whether there is an error but how many errors there are and how serious they are.
Panko (2007)
Even obvious, elementary errors in very simple, clearly documented spreadsheets are... difficult to find.
Galletta, et al (1993)
Never assume a spreadsheet is right, even your own.
Raffensperger (2001)
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)
Most large spreadsheets have dozens or even hundreds of errors.
Panko & Ordway (2005)
It is now widely accepted that errors in spreadsheets are both common and potentially dangerous.
Nixon & O'Hara (2010)
Spreadsheets are notoriously error-prone.
Cunha, et al (2011)
Spreadsheet shortcomings can significantly hamper an organization's business operation.
Reschenhofer & Matthes (2015)
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)
Spreadsheets are extraordinarily and unacceptably prone to error.
Dunn (2010)
Errors in spreadsheets... result in incorrect decisions being made and significant losses incurred.
Beaman, et al (2005)
Spreadsheets are alarmingly error-prone to write.
Paine (2001)
Spreadsheets... pose a greater threat to your business than almost anything you can imagine.
Howard (2005)
Untested spreadsheets are riddled with errors.
Miller (2005)
Spreadsheets are more fault-prone than other software.
Kulesz & Ostberg (2013)
A significant proportion of spreadsheets have severe quality problems.
Ayalew (2007)
It is irrational to expect large error-free spreadsheets.
Panko (2013)
94% of the 88 spreadsheets audited in 7 studies have contained errors.
Panko (2008)
Studies have shown that there is a high incidence of errors in spreadsheets.
Csernoch & Biro (2013)
Your spreadsheets may be disasters in the making.
Caulkins, Morrison, & Weidemann (2006)
People tend to believe their spreadsheets are more accurate than they really are.
Caulkins, Morrison, & Weidemann (2006)
The results given by spreadsheets are often just wrong.
Sajaniemi (1998)
Spreadsheets are commonly used and commonly flawed.
Caulkins, Morrison, & Weidemann (2008)
Spreadsheet errors have resulted in huge financial losses.
Abraham & Erwig (2007)
Spreadsheets contain errors at an alarmingly high rate.
Abraham, et al (2005)
Every study that has looked for errors has found them... in considerable abundance.
Panko & Halverson (1996)
...few incidents of spreadsheet errors are made public and these are usually not revealed by choice.
Kruck & Sheetz (2001)
Developing an error-free spreadsheet has been a problem since the beginning of end-user computing.
Mireault (2015)
Spreadsheets can be viewed as a highly flexible programming environment for end users.
Abreu, et al (2015)
Spreadsheet development must embrace extensive testing in order to be taken seriously as a profession.
Bock (2016)
Spreadsheet errors are still the rule rather than the exception.
Nixon & O'Hara (2010)

i spreadsheet testing methodology: Immunity

In this series of articles we introduce the i methodology for testing spreadsheets.

The i spreadsheet testing methodology is a set of guidelines for validating that a spreadsheet does what it is intended to do and ensuring that it will continue to do so.

The i methodology consists of five components:

  • Intent.
  • Instructions.
  • Instruments.
  • Implementation.
  • Immunity.

Read more: i spreadsheet testing methodology: Immunity

i spreadsheet testing methodology: Implementation

In this series of articles we introduce the i methodology for testing spreadsheets.

The i spreadsheet testing methodology is a set of guidelines for validating that a spreadsheet does what it is intended to do and ensuring that it will continue to do so.

The i methodology consists of five components:

  • Intent.
  • Instructions.
  • Instruments.
  • Implementation.
  • Immunity.

Read more: i spreadsheet testing methodology: Implementation

i spreadsheet testing methodology: Instruments

In this series of articles we introduce the i methodology for testing spreadsheets.

The i spreadsheet testing methodology is a set of guidelines for validating that a spreadsheet does what it is intended to do and ensuring that it will continue to do so.

The i methodology consists of five components:

  • Intent.
  • Instructions.
  • Instruments.
  • Implementation.
  • Immunity.

Read more: i spreadsheet testing methodology: Instruments

i spreadsheet testing methodology: Instructions

In this series of articles we introduce the i methodology for testing spreadsheets.

The i spreadsheet testing methodology is a set of guidelines for validating that a spreadsheet does what it is intended to do and ensuring that it will continue to do so.

The i methodology consists of five components:

  • Intent.
  • Instructions.
  • Instruments.
  • Implementation.
  • Immunity.

Read more: i spreadsheet testing methodology: Instructions

i spreadsheet testing methodology: Intent

In this series of articles we introduce the i methodology for testing spreadsheets.

The i spreadsheet testing methodology is a set of guidelines for validating that a spreadsheet does what it is intended to do and ensuring that it will continue to do so.

The i methodology consists of five components:

  • Intent.
  • Instructions.
  • Instruments.
  • Implementation.
  • Immunity.

Read more: i spreadsheet testing methodology: Intent

i spreadsheet testing methodology: Overview

In this series of articles we introduce the i methodology for testing spreadsheets.

The i spreadsheet testing methodology is a set of guidelines for validating that a spreadsheet does what it is intended to do and ensuring that it will continue to do so.

The i methodology consists of five components:

  • Intent.
  • Instructions.
  • Instruments.
  • Implementation.
  • Immunity.

Read more: i spreadsheet testing methodology: Overview

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