I personally think that if users have to think too hard about what an icon (or status indicator) means, then something's not right with it and you need some other visualization for conveying whatever message it is you're trying to be convey.
For me, the weather icons have never passed that test because, at this stage, I've heard multiple people on different occasions say that they find them confusing. That, to me, tells me that they don't work and a different visualization is needed.
It's easier to disambiguate shapes than colors.
http://www.informationisbeautiful.net/visualizations/colours...
- green/blue: safe/go
- (optional) yellow: caution
- red: danger/stop
I don't know of any country where this convention is not in use.
There's more about why and when we use them in my other comments.
- India: http://3.imimg.com/data3/II/GU/MY-762554/danger-signs-boards...
- Asia: http://cache4.asset-cache.net/gc/152921698-warning-these-sig...
- Africa: http://www.lifeloveandsugar.com/wp-content/uploads/2015/06/d...
- Middle East: http://cache3.asset-cache.net/gc/474346969-an-israeli-sign-i...
* Rosary Pea
* Coral Snake
* Stag Beetle
* Jerusalem Cherry
* Phantasmal poison frog
* Strawberry poison dart frog
* Bittersweet nightshade berries
Instead one theory is that the mimicry is in reverse: the coral snake is mimicking the non-fatally venomous "false coral snake" which is also more numerous.
There are a variety of different theories on mimicry, and the science of the coral snake is still debated...
Except for the colourblind, who need additional ways for that information to be conveyed.
I like red/green schemes too, but there always needs to be other cues.
The simplest approach is to add a symbol for failures, to distinguish them from successes. Other colours can be chosen for other statuses that the colour-blind can distinguish without additional symbols.
And Blue Ocean accommodates both. I think this would be a good blog post :)
I wanted the status balls to be the primary focus. The weather icons should only be looked at when all the builds are blue. If they are too attention grabbing then you don't go fixing the red (didn't built) and yellow (tests failing) builds first
Not sure if I'm in the minority here or not though but it actually bothers me if, say, I misconfigured something, build breaks, I fix it but now it's showing it's cloudy. It also took me way too long to realize that cloudy meant it built but failed in the past. I remember my first experience with Jenkins trying to figure out why the build was failing before realizing it wasn't failing and cloudy somehow meant it's good.
Also, and I apologize if this is no longer how the Jenkins weather indicators work, but the last time I used Jenkins, the weather indicators were based on the number of failed builds, not the time the build wasn't green. For me, the number of failed builds is far less interesting than the amount of time that the build was failing. If a developer scrambles with three checkins in 15 minutes that attempt to fix the build and the third one succeeds, that's a better situation than a developer who takes a more measured approach that fixes the build four hours later on the first checkin. The first developer might have created a slightly messier commit history, but the second developer blocked the entire team for half a day. Taking the view that historical build information is really time series data would, to me, be much more insightful.
Way back in the way back, a colleague and I were looking to get some extra information onto the Jenkins (then Hudson) jobs screen. I had some chats with KK over IRC and at the time he did not want to open up having multiple columns in the jobs screen. His then view of the world is that the jobs screen should be somewhat opinionated and clean.
So I said, well what about if we add just a second icon beside the status ball and if you hover over it you get a tooltip that displays some detail message. KK said that didn't seem so bad... so off hacking I went.
What I wanted was a kind of health column that would tell you the worst health of your job at a glance.
The idea we had was that some jobs may have low test coverage, some jobs may have a flaky build, some jobs may have lots of TODO comments in the code, etc. So you would define the criterial levels of each metric and score jobs against those levels.
Then we would pick the worst score and display an icon for that score.
So off looking for icons I went... keeping in with the Tango theme that was used by the project at the time...
My initial idea was that you would maybe have a heart that gets into worse and worse shape as the score went from 100% to 0%... but the red colour was too distracting...
So I soon realized that - unlike the status balls - we wanted something that was not quite as high a contrast. You want to see the status balls first... if something is yellow or red, you fix that first... only when everything is blue do you want to start looking at the health (which is why the column is called "H")
What I did find is that the weather icons gave me 5 levels of "health" and were subtle enough not to distract from the red and yellow balls... plus my colleague and I thought it would be really cool to have the code coverage metric be an umbrella and as the code coverage gets worse the umbrella would loose bits of fabric so that 0% coverage would be a tattered frame.
So I had my patch and submitted it to KK and it got merged and the rest is history.
For the initial patch I wanted there to be something for every job already, so the default job health is based on the last 5 builds (because there are only 5 levels of the default icons, and scanning any more would just be pointless)
We also added contributors for the code coverage plugins and the violations plugin (which my colleague was the initial author of)
Then of course you get distracted in other things...
What disappoints me greatly is that in the 700 or so releases of Jenkins that have had the weather icons... nobody has actually gone and implemented the custom icons for job health feature that is embedded directly in the code and was available from the very first day the patch landed...
I don't know if this is because the weather icons are just enough... or if it is because nobody noticed that you can do that...
I know for the code coverage icon, neither Peter nor I are good enough artists to come up with 5 levels of umbrella in various states of disrepair... another idea was a pie chart or a small trend graph... but we always seemed to have more important things to do... and since I joined CloudBees I've been too busy to get back to that area.
So anyway, I guess my point is that the weather icons were designed to be more subtle than the build status and the API was designed to allow plugins to contribute their own health and even their own icons... but whatever about other plugins contributing to health reports... nobody has bothered to contribute the customized icons!
-Stephen (the originator of the weather icons in Jenkins)
In less disciplined environments (most likely the majority of dev environments) they help nudge people by showing that the track record is less stellar than the green icon shows.
Please keep them :)
In Jenkins 1.x and 2.x they are visible on the top level dashboard alongside the green/blue orbs and I often wonder if that's a source of distraction because I (as a user) am looking at both of these indicators now and wondering how to interpret the state based on both of them, when maybe I shouldn't.
Would it help if the top level dashboard(s) contained only one general build status indicator (vs two), and then the trend/health indicators were "down" on the pipeline details page alongside other health/metrics info (static analysis info)?
If you want to show the state of the last 5 builds, then... show the state of the last 5 builds. e.g. ynyyY (imagine unicode ticks and crosses instead)
Just my tuppence. For the record, Jenkins is amazing in how it has sparked a revolution in the CI world, and I love it, but the weather icons do wind me up somewhat.
Edit: replaced unicode ticks and crosses with y and n because they weren't showing up.
http://www.businessinsider.com/pie-charts-are-the-worst-2013...
For what you're suggesting a horizontal thermometer shape might work, as that would make the historical order more obvious
(Y)nnyyn
* the code coverage of the most recent build,
* the findbugs / violations count of the most recent build
* any other health metric that plugins decide to contribute to the build.
The icon is supposed to be the icon of whichever report is the worst health and FTR each plugin has always had the option to define their own icons (see my other reply for a more detailed background)