Nixon & O'Hara (2010)Spreadsheet errors are still the rule rather than the exception.
Panko (2014)Despite overwhelming and unanimous evidence... companies have continued to ignore spreadsheet error risks.
Teo & Tan (1999)Most executives do not really check or verify the accuracy or validity of [their] spreadsheets...
Panko & Ordway (2005)Most large spreadsheets have dozens or even hundreds of errors.
Abraham, et al (2005)Spreadsheets contain errors at an alarmingly high rate.
Caulkins, Morrison, & Weidemann (2006)People tend to believe their spreadsheets are more accurate than they really are.
Irons (2003)Spreadsheet errors are pervasive, stubborn, ubiquitous and complex.
Kruck & Sheetz (2001)...few incidents of spreadsheet errors are made public and these are usually not revealed by choice.
Dunn (2010)Spreadsheets are extraordinarily and unacceptably prone to error.
Colbenz (2005)Errors in spreadsheets are as ubiquitous as spreadsheets themselves.
Chen & Chan (2000)Spreadsheets are easy to use and very hard to check.
Panko (1999)Every study, without exception, has found error rates much higher than organizations would wish to tolerate.
Kulesz & Ostberg (2013)Spreadsheets are more fault-prone than other software.
Miller (2005)Untested spreadsheets are riddled with errors.
Panko (2013)It is irrational to expect large error-free spreadsheets.
Bock (2016)Spreadsheet development must embrace extensive testing in order to be taken seriously as a profession.
Price (2006)The untested spreadsheet is as dangerous and untrustworthy as an untested program.
Panko (2008)94% of the 88 spreadsheets audited in 7 studies have contained errors.
Nixon & O'Hara (2010)It is now widely accepted that errors in spreadsheets are both common and potentially dangerous.
Abraham & Erwig (2007)Spreadsheet errors have resulted in huge financial losses.
Paine (2001)Spreadsheets are alarmingly error-prone to write.
Beaman, et al (2005)Errors in spreadsheets... result in incorrect decisions being made and significant losses incurred.
Rust, et al (2006)Spreadsheets have a notoriously high number of faults.
Bishop & McDaid (2007)The quality and reliability of spreadsheets is known to be poor.
Ross (1996)A lot of decisions are being made on the basis of some bad numbers.
Chadwick (2002)Spreadsheet errors... a great, often unrecognised, risk to corporate decision making & financial integrity.
Caulkins, Morrison, & Weidemann (2008)Spreadsheets are commonly used and commonly flawed.
Cunha, et al (2011)Spreadsheets are notoriously error-prone.
Sakal, et al (2015)Overconfidence is one of the most substantial causes of spreadsheet errors.
Powell, Baker, & Lawson (2009)1% of all formulas in operational spreadsheets are in error.
Abreu, et al (2015)Despite being staggeringly error prone, spreadsheets are a highly flexible programming environment.
Murphy (2007)60% of large companies feel 'Spreadsheet Hell' describes their reliance on spreadsheets.
Caulkins, Morrison, & Weidemann (2006)Your spreadsheets may be disasters in the making.
Ayalew (2007)A significant proportion of spreadsheets have severe quality problems.
Durusau & Hunting (2015)Spreadsheets are dangerous to their authors and others.
Csernoch & Biro (2013)Studies have shown that there is a high incidence of errors in spreadsheets.
Sajaniemi (1998)The results given by spreadsheets are often just wrong.
Hermans & van der Storm (2015)Spreadsheets are the most popular live programming environments, but they are also notoriously fault-prone.
Reschenhofer & Matthes (2015)Spreadsheet shortcomings can significantly hamper an organization's business operation.
Burnett & Myers (2014)The software that end users are creating... is riddled with errors.
Mireault (2015)Developing an error-free spreadsheet has been a problem since the beginning of end-user computing.
Mireault & Gresham (2015)Spreadsheets are often hard, if not impossible, to understand.
Panko (2007)The issue is not whether there is an error but how many errors there are and how serious they are.
Abreu, et al (2015)Spreadsheets can be viewed as a highly flexible programming environment for end users.
Howard (2005)Spreadsheets... pose a greater threat to your business than almost anything you can imagine.
Panko (2015)Research on spreadsheet errors is substantial, compelling, and unanimous.
Panko & Halverson (1996)Every study that has looked for errors has found them... in considerable abundance.
Raffensperger (2001)Never assume a spreadsheet is right, even your own.
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.
Excel 365 is getting a new cell comments system.
This video from Bill Jenen (AKA Mr. Excel) introduces the new system, highlighting the new features and providing advice about how and when to keep the old system.
The old style of comments, called "Notes", have been restored to the Review ribbon next to the new "Comments" group.
This article considers the dreaded "phantom link".
That is, Excel displays the security warning "Automatic update of links has been disabled", even though your spreadsheet isn't intended to have any links.
Learn how to easily find and remove phantom links.
Excel Insights is an AI powered service that automatically identifies patterns in your data and provides you with charts you can insert into your workbook.
This article provides an introduction to the features of AI Insights, including the four insight classes:
A very common requirement is to count only the unique occurrences of some values. But Excel doesn't have a direct way to count unique values.
In this post we show 5 different ways of counting unique values in Excel:
COUNTUNIQUEuser defined function
Excel can analyze data from many sources. But are you using the Data Model to make your life easier?
In this post you learn how to create a pivot table using two tables by using the Data Model feature in Excel.
This article outlines 18 best practices for working with data in Google Sheets.
Use these practices to make your work more efficient, reduce errors, make your work easier to follow and understand, and add value to the workflow process.
Step Charts are useful for showing values that don't change steadily from one point to the next, but that instead are constant for a period of time, then jump to the next level, and are constant for another period of time.
For example, step charts are good for showing how things like postal rates or interest rates change over time.
Step charts are not native to Excel, but it's not hard to build a step chart, with a bit of data tweaking and some smoke-and-mirrors formatting.
There are two ways to build step charts:
This article describes problems that can occur when a formula reference includes its own worksheet name.
To avoid these problems, get into the practice of always removing sheet references to the current worksheet.
[An additional related problem we've seen is that the Sort feature may not work correctly when a formula being sorted includes a reference to its own worksheet name.]
This video shows a case study where data quality issues needed to be dealt with before the results could be trusted.
The essence of the message is "...look at our data and investigate the quality of it before we start building models and complex formulas and queries ...".