The other day while doing aimless roaming on the dotcom alley, I have seen some cool optical illusions. There are so many valuable lessons optical illusions can teach us – chart makers. Don’t believe me? Read on…
We cant measure sizes either
Much has been said about our inability to measure angles. That is why most of the charting gurus recommend you to not use pie charts. But what about sizes? Well, it seems we are bad at measuring them too. Look at this illusion.
Both the orange circles are of same size. As you can see, they don’t look so. I call this a bubble chart illusion.
What can this illusion teach us?
- Use data labels
- When you make a big chart, the neighbors of a data element determine how they are perceived. Avoid this illusion by adjusting axis, rearranging data or using color.
Colors are what we think they are
We talk alot about colors in charting. But when it comes to interpreting colors, our mind is very subjective. Look at this color illusion.
Can you believe both cells A and B are of the same color?
What can this illusion teach us?
- Use fewer colors when possible. Better still use one color.
- When you need to use multiple colors, make them distinct. If you use shades of same color, make sure they are not poorly juxtaposed.
Too much data can create un-necessary patterns
Look at this optical illusion that looks like a stacked bar chart. See how the lines don’t seem parallel.
I am sure some of you would have seen a stacked bar with enough data that looks closely like the above illusion.
What can this illusion teach us?
- If you are plotting too much data on a chart, make sure the chart is readable.
- Dont place chart elements (bars in this case) close to each other, don’t separate them too much either.
Gray color messes with our gray matter
There are just so many optical illusions involving gray color that I don’t know where to begin. See this for eg.
Because of its neither here nor there nature, gray color can easily mess with our mind (and eyes). One reason why excel 2003 and earlier charts looked so ugly is because of the gray color. They had that as default background.
What can this illusion teach us?
- Do not leave your chart’s underwear on – In other words, remove that default gray background from your charts.
- Avoid using close variations of gray when you plot multiple series of data.
No matter what your chart says, your audience will see what they want
You might think your chart proves pattern A. But your audience only see the pattern B. For eg. look at this illusion:
Some people instantly see a flower vase. Others see 2 faces. And this could be true for your charts.
What can this illusion teach us?
- Don’t leave the messages for interpretation. Spell them out if you can.
We over estimate our memory power
Our mind is notoriously forgetful and unlearns things so fast. Don’t trust me? Well, see this animated illusion.
Both yellow lines are of same length. But the moment the guiding lines are removed our mind tends to think first line is smaller than the next one. Add the guiding lines again and our mind quickly learns the fact that they are of same length. Remove it and it is as if we never learned the fact. In this great TED talk, the speaker Dan Ariely talks about the same and asks whether our mind is in complete control of the decisions we make.
What can this illusion teach us?
- Next time you set out to make that 50 slide presentation, remember this: “we are poor at remembering things”
- Use data labels, keep things simple and together if you can.
No one talks about a chart, but everyone talks about an illusion
Well, what can I say. I look at at least a dozen charts everyday. And yet, here I am, talking about optical illusions. That is true for most of us. We like magic, we like wonderful things and want to talk about them. We have seen one too many charts that they don’t excite us anymore. Show me an optical illusion and I am ready to stare at the black dot for 30 seconds. Show me a pie chart and I am yawning already.
What can this teach us?
- Whenever you can, tell a great story.
- Connect with your audience in unusual and exciting ways.
- Break some rules and don’t be shy to add a spark.
Additional charting resources to help you make magic:
- Better excel chart templates – Create great looking charts with these templates
- Vizooalization – What your neighborhood zoo can teach about visualization
- Charting Principles – Simple yet very effective rules to make great charts
46 Responses to “6 Best charts to show % progress against goal”
Chandoo, thanks for another interesting post.
One thing I'm missing is the question: What is progress, what does one want to know exactly?
I'm asking the question because I think of progress as not the same as "state of completion." Percentages/bars, etc., as shown above, are great to communicate state of completion, but less so for progress.
That's because project progress is how state of completion *relates to* the resources spent so far. Resources can be things like dollars spent, hours spent or project time passed. For example, 5% would be "good progress" in the first week of a one-year project, but terrible progress in the last week of the project.
The way I prefer to report progress is as a simple line chart with time on the x axis, and maybe a marking for the end point (and maybe an "ideal"/"as planned" line).
If it really must be a single number, you could go a EVA-ish route and divide the current % of completion by the current % of project time passed, which gives you a schedule performance index (1 or bigger than 1 = good; smaller than 1 = bad). For this, your suggested charts should work great!
I avoid 'progress' except where I can objectively assess progress, such as counting bricks laid or concrete poured. For intellectual work, I don't think that its possible to measure progress to completion with any reliability or credibility. I prefer to update forcasts of completion date, because that's where the effect of completion on dependent activities, deliverables and outturn value of the project is felt. This is also referred to as the 0-100 method. An activity is set at 0 complete until its actually finished, when it is set at 100% complete.
Hi Chandoo,
Great post! I have a preference towards thermometer charts too mainly because of the target/actual comparison.
Just an FYI...seems like the the screen shot for the pies #4 are under the #5 heading. Also the pies conditional formatting is something that doesn't accurately portray completion since the pies are segmented into quarters.
AND also a little trivia...those "pies" are called Harvey Balls, named after Harvey Poppel...
Chandoo,
I wonder. Is there a trick to unzipping your files?
I always seem to end up with a series of XML files rather than an XLSX.
Thanks a lot. 🙂
Eric~
Hi Chandoo,
Thank you again for this amazing help you are so resourcefull to make us little bit more amazing everyday.
When I click on the link on the page "http://img.chandoo.org/c/best-charts-for-goal-progress-comparison.xlsx" it is always bringing me to a zip file with all XML files without the XLSX file. I tried with mozilla and IE.
Thank you
[…] http://chandoo.org/wp/2014/03/10/best-charts-to-show-progress/?utm_source=feedburner&utm_medium=… […]
@All having trouble with download file.
1. Download the file.
2. Rename the extension as .xlsx
3. Double click or open it in Excel
Doesn't make any difference Chandoo, still end up with a zip file full of xml related files/folders
@Ian H
Download the zipped file and rename it to *.xlsx
where * is the filename
ps: Great name!
Many thanks for your help Hui but not sure why you are repeating what Chadoo said and which I first posted to because it didn't work for me. I did as he said and it didn't work, hence my post.
Chandoo says:
March 11, 2014 at 1:52 am
@All having trouble with download file.
1. Download the file.
2. Rename the extension as .xlsx
3. Double click or open it in Excel
Also, please note that we are investigating an issue with our webserver settings that may be causing this behavior. Sorry for the inconvenience. I am hoping to get this fixed in next 48 hours.
I used thermometer chart & conditional formatting using traffic lights. I just recently completed a dashboard I hope you can take a look but don't know where to send it. Thanks.
The in-cell bar charts is very interesting. This is not to be used as one can easly do manipulations by changing fonts/ font size etc
Hi..this is really helpful..
but I hve one quick ques..is it possible to hve conditional formating for chart graph based on text value and not the numbers..if I take your example project one bar should be red...if data is project 2 then it should be blue..basically we mke chart based on countries n each countries are assigned specific color...so I want a way where I can use conditionsl formating and not do it manaually each month.
You can set up conditional formatting rules to do this.
See this... it may help
http://chandoo.org/wp/2010/04/01/incell-panel-chart/
Hi Chandoo,
Great article and will be very useful.
One question - is it possible to have in-cell bar chart and the percentage complete (similar to icons)?
Try something like :
=CONCATENER(REPT("|";A1*100);REPT(" ";25-A1*25);"|")
it's quite nice
Hi Chandoo,
I am a great fan of you since i stumbled upon your blog. Your blog is very informative and insightful. I liked the way you presented the 5 steps using thermometer chart. I was very much inspired by that and tried to make my own version with 20 tasks to complete. On and after 17th step it was going downward. So I wanted to ask you that is there any limitation to thermometer chart
[…] shows us the 6 best charts to use, when you want to show your progress against a goal. There’s a sample file to download, so you can experiment on your […]
Is there any xhart is available which can show achivement percentage it may 80% or 120% means more an set target.?
Hi Chandoo,
Love your site. I have a small question regarding plotting data that contains ranking. I have 2 fields - Country, Rank. Note that i don't have the absolute values from which the rank has been calculated. So what is the best way of showing this on a graph given only the above 2 fields. Appreciate it
Regds,
Ross
@Ross
I would assign a set of simple numeric values to your ranks
Even a simple 1 to 10 makes plotting relativities easy
Dear Chandoo Sir,
Really awesome post.
Thanks.
Vignesh.V
We can always rely on Chandoo to explain to us clearly things that perhaps we already knew but weren't putting into practice the best way.
A limit I never liked about data bars was that they are monochrome - one colour for positive values, one colour for negative. So a couple of weeks ago I sat down to figure out a workaround. If anyone's interested...
http://digimac.wordpress.com/2014/06/29/multicoloured-data-bars-in-excel/
Epic fail on my part! After three months I just found out that what worked on my machine, didn't work on others.
Problem solved, more functions added.
The link above at
To hide them use ;;; custom cell formatting code (how to).
appears to be incorrect. However, using the downloaded file and selecting a cell(s) from that example provides the easy answer.
I wondered if the pies could have a color other than black and white (which, of course, would raise the color-blindness issue that you referred to with the traffic lights example).
Hi Chandoo!
Thanks for the informative post!
I have managed to understand and replicate all of the progress graphs except one, the thermo bar. I read up on the tutorial of how to create them, and I understand almost everything about the look and use of the bar, but one problem I am having is that I cannot seem to "center" the bar into the cell like you did. The reason being that even though the highest input (progress) percent is 100%, the program automatically puts in another 20%, so instead of 100% stopping at the end of the graph, it stops 20% short and I have a huge space at the end because of it.
How did you counter that problem? I have been trying for hours to fix it
@Aden
Set the Axis limits to Minimum 0 and maximum 1
Thanks. I started running a project recently, and I found your charts to be really helpful in tracking it's progress. I'm glad I found your page.
Hi Chandoo!
Great stuff for my customized project moving forward. However, when I use the blue block bars, the %ages spark up to smt like 5000% and cannot lower them nor scale them. If I input manually such as 50% without formatting a column, the bar for 50% e.g., will fill the cell completely, so that's kind of odd... what to do?
Thanks!
I guess I have the same problem. When I put 50 and click on the percentage, it is giving me 500%. Can someone help us on this. Thanks in advance
[…] http://chandoo.org/wp/2014/03/10/best-charts-to-show-progress/ […]
Hey,
Thank you for making this page. I do have one problem with the thermo graphs. Whenever I try to drag the graphs from one cell to the cell beneath it, the data remains selected on the former.
For example, if I had a thermo with a target number in A1 and an actual number in B1 with my thermo in C1, when I drag my thermo into C2, C3, etc., all of the graphs show the results from A1 and B1.
Is there a way to have these graphs update automatically as I will be regularly working in an excel file with hundred of entries?
P.S. I removed the $ symbols from 'Select Data', but that did not fix the problem.
Thanks again!
@Lisa
Not sure but it sounds like the new cells have Conditional formats applied
Select just the new cells
Select Conditional formatting, Clear Rules, Clear Rules from selected Cells
Hi Chandoo.
I am charting on some defaulter data where greater than zero is not desirable. Problem is that I have to highlight zero as target and anything above as undesirable. Seek your help
Hi Chandoo
Great post!
But I am wondering why bullet chart is not on this list. Is there a reason for its absence?
Thank you for these instructions. The bonus 5 Step Progress Meter you included would be perfect for my project. Where can I find the instructions?
Hi,
Do you know of any simple way to reduce the Data Bars padding so that they fit within the cells?
Thanks and great posy!
Regards
Appreciating the dedication you put into your website and in depth information you
provide. It's good to come across a blog every once in a while that isn't the same out of date rehashed information. Wonderful
read! I've bookmarked your site and I'm including your
RSS feeds to my Google account.
With #1 and #2, how would you also apply a red amber green to the bars (is it possible within chart formatting or would you need to utilise CF)?
I'm thinking of an in cell bar of some kind which will show against a known goal end date how far along with the goal you are (this is to be used for 'how many of the X number of people that I need to train in X timeframe, have been trained and therefore which of each training group is on track to complete on time or falling behind'.
So there would be knowns of number of people, target end date but I'd want it to reflect accurately as some groups of trainees might only have 50 in so their 50% done would be different to a group of trainees where their group had 200 people in it - but 50% would still be the same. Somewhere there'd probably need to be something which noted that there was a different volume of trainees so it could but the remaining effort to train people into context?
Hope that makes some kind of sense, I could be waffling!
[…] charts. Its got things like “Best Charts to Compare Actuals vs Targets” and “Best charts to show progress“. I love me some charts […]
Thanks a lot my dear.
very Useful it for me.
Another great post, thanks for sharing.
Chandoo, I am just starting an Excel class, and everything in the class is new to me. I am learning how to use all of these great charts but don't know what they are all used for. Thank you for your post and I think I will be able to use this down the road throughout my business career
in the above charts , Chart #2: Conditional Formatting Data Bars
->Assume if we have completed 35% of work it is showing in Blue color ,in the same cell remaining 65% of work should shows in some color , how to show?
Hi Sir,
This is Rachit and I am a big fan of you and your work. This is to request you please make a video for Beverages Sales performance data analysis in Excel.
Regards,