Bock (2016)Spreadsheet development must embrace extensive testing in order to be taken seriously as a profession.
Abreu, et al (2015)Despite being staggeringly error prone, spreadsheets are a highly flexible programming environment.
Abraham & Erwig (2007)Spreadsheet errors have resulted in huge financial losses.
Ross (1996)A lot of decisions are being made on the basis of some bad numbers.
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.
Caulkins, Morrison, & Weidemann (2006)Your spreadsheets may be disasters in the making.
Hermans & van der Storm (2015)Spreadsheets are the most popular live programming environments, but they are also notoriously fault-prone.
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.
Sajaniemi (1998)The results given by spreadsheets are often just wrong.
Powell, Baker, & Lawson (2009)1% of all formulas in operational spreadsheets are in error.
Nixon & O'Hara (2010)Spreadsheet errors are still the rule rather than the exception.
Panko & Ordway (2005)Most large spreadsheets have dozens or even hundreds of errors.
Cunha, et al (2011)Spreadsheets are notoriously error-prone.
Reschenhofer & Matthes (2015)Spreadsheet shortcomings can significantly hamper an organization's business operation.
Beaman, et al (2005)Errors in spreadsheets... result in incorrect decisions being made and significant losses incurred.
Panko (1999)Every study, without exception, has found error rates much higher than organizations would wish to tolerate.
Ayalew (2007)A significant proportion of spreadsheets have severe quality problems.
Kruck & Sheetz (2001)...few incidents of spreadsheet errors are made public and these are usually not revealed by choice.
Mireault (2015)Developing an error-free spreadsheet has been a problem since the beginning of end-user computing.
Chadwick (2002)Spreadsheet errors... a great, often unrecognised, risk to corporate decision making & financial integrity.
Panko (2014)Despite overwhelming and unanimous evidence... companies have continued to ignore spreadsheet error risks.
Miller (2005)Untested spreadsheets are riddled with errors.
Nixon & O'Hara (2010)It is now widely accepted that errors in spreadsheets are both common and potentially dangerous.
Panko (2008)94% of the 88 spreadsheets audited in 7 studies have contained errors.
Bishop & McDaid (2007)The quality and reliability of spreadsheets is known to be poor.
Rust, et al (2006)Spreadsheets have a notoriously high number of faults.
Raffensperger (2001)Never assume a spreadsheet is right, even your own.
Kulesz & Ostberg (2013)Spreadsheets are more fault-prone than other software.
Chen & Chan (2000)Spreadsheets are easy to use and very hard to check.
Price (2006)The untested spreadsheet is as dangerous and untrustworthy as an untested program.
Panko (2015)Research on spreadsheet errors is substantial, compelling, and unanimous.
Sakal, et al (2015)Overconfidence is one of the most substantial causes of spreadsheet errors.
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.
Galletta, et al (1993)Even obvious, elementary errors in very simple, clearly documented spreadsheets are... difficult to find.
Durusau & Hunting (2015)Spreadsheets are dangerous to their authors and others.
Dunn (2010)Spreadsheets are extraordinarily and unacceptably prone to error.
Murphy (2007)60% of large companies feel 'Spreadsheet Hell' describes their reliance on spreadsheets.
Mireault & Gresham (2015)Spreadsheets are often hard, if not impossible, to understand.
Panko (2013)It is irrational to expect large error-free spreadsheets.
Burnett & Myers (2014)The software that end users are creating... is riddled with errors.
Panko & Halverson (1996)Every study that has looked for errors has found them... in considerable abundance.
Teo & Tan (1999)Most executives do not really check or verify the accuracy or validity of [their] spreadsheets...
Panko (2007)The issue is not whether there is an error but how many errors there are and how serious they are.
Caulkins, Morrison, & Weidemann (2008)Spreadsheets are commonly used and commonly flawed.
Paine (2001)Spreadsheets are alarmingly error-prone to write.
Krishna, et al (2001)Programmers exhibit unwarranted confidence in the correctness of their spreadsheets.
Colbenz (2005)Errors in spreadsheets are as ubiquitous as spreadsheets themselves.
Data cleansing is an important activity within Excel and one that we find ourselves doing day in day out, sometimes without even knowing it.
My top data cleansing techniques are:
This article describes a situation where there was a significant difference between the calculated and expected values.
The problem was caused by the way that Excel rounds values for display purposes, but the formula is calculating using the actual cell content.
ROUND function can help resolve this type of problem.
When you think of visualizing parts to a whole in Excel charts the first thing that's likely to come to mind is the pie chart, or if you're Homer Simpson then you might think of doughnut charts!
Using football as inspiration, let's look at our options for visualizing parts to a whole data using a standard set of football statistics.
Chart types explored in this article include:
Obviously, we don't want our PivotTables littered with
#NULL! errors if we're presenting them in a report. That would just create unnecessary questions and we're busy enough.
Thankfully Excel PivotTable error handling is easy to control via the PivotTable Options. This article shows you how.
As a bonus, this article also discusses what to display when the prior period was zero. Specifically, is the percentage change from nothing to something equal to 100%?
Mastering Excel takes some experience and patience, but it's easy to make mistakes even if you've been using it for a long time. Sometimes, choices seem like a brilliant idea—until they're not, and the resulting problems are hard to troubleshoot.
In this article, I share 10 ways to avoid actions that seem good... at the time:
The tutorial shows how to use
IFERROR in Excel to catch errors and replace them with a blank cell, another value or a custom message.
You will learn how to use the
IFERROR function with
INDEX MATCH, and how it compares to
IF ISERROR and
IF formulas are extremely useful for complex decision making on a spreadsheet, but they can also be long, messy and convoluted.
This blog post explores 4 alternatives which are easier, faster and cleaner than the classic nested
VLOOKUPfor an exact match.
VLOOKUPfor a range lookup.
When it comes to VBA, it's almost too easy to make a mistake. These mistakes can cost you greatly, both in time and in frustration.
In this post, I'd like to help you avoid these typical mistakes and make you a better VBA programmer:
Application.ScreenUpdating = False.
Learn why using an Excel Table as the source of a Pivot Table can save time and prevent errors.
The reasons why you should use Tables for the source data range of your Pivot Tables are: