Raffensperger (2001)Never assume a spreadsheet is right, even your own.
Mireault & Gresham (2015)Spreadsheets are often hard, if not impossible, to understand.
Krishna, et al (2001)Programmers exhibit unwarranted confidence in the correctness of their spreadsheets.
Galletta, et al (1993)Even obvious, elementary errors in very simple, clearly documented spreadsheets are... difficult to find.
Panko (1999)Every study, without exception, has found error rates much higher than organizations would wish to tolerate.
Caulkins, Morrison, & Weidemann (2006)People tend to believe their spreadsheets are more accurate than they really are.
Hermans & van der Storm (2015)Spreadsheets are the most popular live programming environments, but they are also notoriously fault-prone.
Caulkins, Morrison, & Weidemann (2008)Spreadsheets are commonly used and commonly flawed.
Durusau & Hunting (2015)Spreadsheets are dangerous to their authors and others.
Paine (2001)Spreadsheets are alarmingly error-prone to write.
Panko (2015)Research on spreadsheet errors is substantial, compelling, and unanimous.
Abraham & Erwig (2007)Spreadsheet errors have resulted in huge financial losses.
Rust, et al (2006)Spreadsheets have a notoriously high number of faults.
Sajaniemi (1998)The results given by spreadsheets are often just wrong.
Panko (2008)94% of the 88 spreadsheets audited in 7 studies have contained errors.
Nixon & O'Hara (2010)Spreadsheet errors are still the rule rather than the exception.
Ayalew (2007)A significant proportion of spreadsheets have severe quality problems.
Miller (2005)Untested spreadsheets are riddled with errors.
Sakal, et al (2015)Overconfidence is one of the most substantial causes of spreadsheet errors.
Panko & Ordway (2005)Most large spreadsheets have dozens or even hundreds of errors.
Mireault (2015)Developing an error-free spreadsheet has been a problem since the beginning of end-user computing.
Burnett & Myers (2014)The software that end users are creating... is riddled with errors.
Chadwick (2002)Spreadsheet errors... a great, often unrecognised, risk to corporate decision making & financial integrity.
Panko (2007)The issue is not whether there is an error but how many errors there are and how serious they are.
Teo & Tan (1999)Most executives do not really check or verify the accuracy or validity of [their] spreadsheets...
Dunn (2010)Spreadsheets are extraordinarily and unacceptably prone to error.
Abreu, et al (2015)Spreadsheets can be viewed as a highly flexible programming environment for end users.
Panko (2014)Despite overwhelming and unanimous evidence... companies have continued to ignore spreadsheet error risks.
Bishop & McDaid (2007)The quality and reliability of spreadsheets is known to be poor.
Abraham, et al (2005)Spreadsheets contain errors at an alarmingly high rate.
Bock (2016)Spreadsheet development must embrace extensive testing in order to be taken seriously as a profession.
Powell, Baker, & Lawson (2009)1% of all formulas in operational spreadsheets are in error.
Howard (2005)Spreadsheets... pose a greater threat to your business than almost anything you can imagine.
Nixon & O'Hara (2010)It is now widely accepted that errors in spreadsheets are both common and potentially dangerous.
Csernoch & Biro (2013)Studies have shown that there is a high incidence of errors in spreadsheets.
Irons (2003)Spreadsheet errors are pervasive, stubborn, ubiquitous and complex.
Kulesz & Ostberg (2013)Spreadsheets are more fault-prone than other software.
Abreu, et al (2015)Despite being staggeringly error prone, spreadsheets are a highly flexible programming environment.
Price (2006)The untested spreadsheet is as dangerous and untrustworthy as an untested program.
Ross (1996)A lot of decisions are being made on the basis of some bad numbers.
Murphy (2007)60% of large companies feel 'Spreadsheet Hell' describes their reliance on spreadsheets.
Kruck & Sheetz (2001)...few incidents of spreadsheet errors are made public and these are usually not revealed by choice.
Caulkins, Morrison, & Weidemann (2006)Your spreadsheets may be disasters in the making.
Chen & Chan (2000)Spreadsheets are easy to use and very hard to check.
Reschenhofer & Matthes (2015)Spreadsheet shortcomings can significantly hamper an organization's business operation.
Cunha, et al (2011)Spreadsheets are notoriously error-prone.
Colbenz (2005)Errors in spreadsheets are as ubiquitous as spreadsheets themselves.
Panko & Halverson (1996)Every study that has looked for errors has found them... in considerable abundance.
Beaman, et al (2005)Errors in spreadsheets... result in incorrect decisions being made and significant losses incurred.
Panko (2013)It is irrational to expect large error-free spreadsheets.
Excel 2010's conditional formatting feature is a super quick and easy way to find duplicate data in your spreadsheets.
Here are the top 10 features in Excel according to you:
I was working on a function that uses regular expressions to determine whether a potential name for a workbook, worksheet or range contains illegal characters. I started by writing a little routine to determine which characters are illegal for sheet names. Of course, I could have just used one that I knew was prohibited and got the message below. But then I might never have thought about the use of single quotes in worksheet names.
When working on a spreadsheet that someone else has built, there are a number of things that can make life particularly difficult. One of these, which is rarely necessary, is the use of merged cells.
The purpose of today's post, however, is not to teach you how to use Merge Cells, but to warn of the dangers of using them unnecessarily, and in the wrong place.
I got a email from a client asking for help because Excel was "destroying," to use his terminology, his 2003 workbook after conversion to the 2007 format. And, after analyzing the kind of change Excel made, I had to agree.
The basic problem is that names that are legitimate names in Excel 2003 may become unacceptable in 2007 (or later). But, a more devastating problem is with a formula using a name with a dot in it. Even though it is completely legitimate, Excel changes the dot to a colon. This causes the formula
=SW1.SW2 to become
=SW1:SW2. Don't ask me why. It just does. The result is the formula is all wrong and destroys the integrity of the workbook.
A paper used to justify austerity economics appears to contain an Excel error.
An economics paper claiming that high levels of national debt led to low or negative economic growth could turn out to be deeply flawed as a result of, among other things, an incorrect formula in an Excel spreadsheet.
[The academic paper that this article is based on is available at:
Does high public debt consistently stifle economic growth? A critique of Reinhart and Rogoff]