Please Don’t Request User Input in the Middle of a Lengthy Task

Just Say No

It’s happened to everyone. You kick off a software installer, answer a few questions about how you’d like things set up, click next and you’re presented with a long progress bar. “No problem,” you think to yourself, “this is a good excuse to grab a cuppa joe.” You leave the computer to its business and hit the kitchen, maybe catching a glance at the paper. After some time has passed, it occurs to you that the installer’s probably been finished for a while, so you head back to your computer to start using your fresh new software. And then BAM! You get slapped in the face with just one last question that the installer needs you to answer. It turns out that it’s only partially complete, and when you click next again, you’re presented with another long progress bar. Now you’re faced with a decision: do you switch tasks again, or do you babysit the installer, in case it has another question?

This behavior drives me absolutely mad. I’m impatient with installers to begin with; they’re a hiccup (albeit a necessary one) between me and the software I want to use. Of course, it’s not just installers that suffer from this problem. Any piece of software that has to perform some kind of long-running task can be subject to this annoyance, simply by requiring user input anywhere except at the very beginning or end of a lengthy task.

The amount of frustration this bug causes is directly proportional to how long the task will take. I recall a recent mishap where I was installing an older Debian distro on an extremely slow ARM machine. I thought I had answered all of its questions, and left my office to do errands for several hours. I was confident that when I returned, the machine would be ready to go. Of course, you know how this story ends: upon my return, I found the installer waiting for input, and it took several more hours for the installation to complete. My work for the day was set back, and my schedule was thrown off.

Thankfully, the solution to this problem is extremely obvious: batch up and prompt for all of the necessary user input before starting a long running task. Never, ever interrupt the task to prompt for more input unless it is 100% unavoidable. If truly unforeseen circumstances do require user action, try to continue any work that can still be performed. If all of the work is dependent on the user feedback, consider continuing the work in the background by guessing the most likely user response. If the user shows up and enters a different response than the one guessed, back out the guess work and do the right thing. If the user is not present to see the prompt, at least there’s a chance that the long-running task will continue down the right path uninterrupted.


  • One word — WORD.

  • srahul wrote:

    The recent change we did to our installer that did exactly this stupidity is to provide a configuration file instead of real time input.
    The user then updates this configuration file (that already has all the default values) and runs the installer.
    Next overkill we are planning is to provide input screen to this config file.

  • This is also a peeve of mine.

    Another peeve? White text on a black background … oh, my retinas.

  • I miss the old days where you install things just by unzipping the file. Practically no work, and the application worked without issue.

    Now, practically anything requires installation.

    Another pet peeve are those who complain about white text on black backgrounds but are unable to use an extension that allows undoing this.

  • Paul Brown wrote:

    > If truly unforeseen circumstances do require user action, try to continue any work that can still be performed.

    This has got to be the most important part; nothing infuriates me more than a long copying task that stalled after twenty files because there was a potential conflict. You could still have copied the rest of the files, couldn’t you? Perhaps even (and, I know, I’m reaching for the stars here) copied everything that you could and built an ongoing list of issues requiring attention for me to deal with when I choose to do so?

  • Jmizzle wrote:

    First world problems

  • cranky troll wrote:

    @Evan@@Evan Another pet peeve of mine are those that complain about installers but are uunable to automate them.

  • cranky troll wrote:

    Also using an extension to enhance your broken blog is hardly a nice way to treat your users. Your text input field wonked on me in chrome and resulted in the above post.

  • @cranky troll

    An extension? What are you talking about? I’ll be happy to fix whatever problem you’re having in Chrome if you could be a bit more specific.

  • I agree with this completely.

    It’s happened to me before as well, extremely irritating.

  • @crank troll — odd that you ding the blogger for his extension answer, yet ding his original complaint by suggesting an equally flawed workaround.

    What if I’m installing something for the first time and have NO IDEA what will be asked of me?? How do I automate that?

  • @Jmizzle
    So because there are people who have it bad in the world, we should annoy and enrage all the others?

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