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Archive for February 2007

Pave the Pathways

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Roger von Oech provides an example of backing off the design process, to observe usage patterns.

For example, designer Christopher Williams tells a story about an architect who built a cluster of large office buildings that were set on a central green. When construction was completed, the landscape crew asked him where he wanted the pathways between the buildings.

“Not yet,” the architect said. “Just plant the grass solidly between the buildings.”

This was done, and by late summer pedestrians had worn paths across the lawn, connecting building to building. The paths turned in easy curves rather than right angles, and were sized according to traffic.

In the fall, the architect simply paved the pathways. Not only did the new pathways have a design beauty, they responded directly to user needs.

In software, this argues to release to users in iterations, incorporate their feedback, and simplify their use cases. Common use cases, added late, tend not to elegantly fit the software’s architecture, so increase the maintenance burden.

Kathy Sierra reminds us that providing what’s good for users is good business.

Ask the question we keep bringing up here, “What will this help the user do?” Not, “How can we make a great product?” Nobody cares about your company, and nobody cares about your product. Not really. They care about themselves in relation to your product. What it means to them. What it does for them. What it says about them that they use your product or believe in your company.

And that users don’t want us to pave the entire courtyard.

How much control should users have?

Obviously this is a big “it depends”, but the main point is to focus on the relationship between user control and user capability. As user capability (knowledge, skill, expertise) increases, so should control — at least for a lot of things we make, especially software, and especially when we’re aiming not just for satisfied users but potentially passionate users. The big problem is that we make our beginning users suffer just so our advanced users can tweak and tune their configurations, workflow, and output. [For the record, I’m a big fan of splitting capabilities into different products, or having a really good user-level modes–where you use wizards or simpler interfaces for new users, etc. Yes, they’re often done badly, but they don’t have to be.]

In the build systems I write, the interface tends to one shell script, whose options behave like make options (passed to the main subsidiary make process), and whose parameters are make targets (with an optional subtarget syntax). So if you know how to ask make to build what you want, then you know how to ask my build system.

There is a lot of room in this interface style for build system developers (eg, you can ask the build system to run any internal target), application developer experts (eg, custom-build individual tasks or libraries, or even single files), and application developer novices (eg: all-encompassing clean, build, and package targets; wrapper scripts which set the shell environment).

Best of all, novice features tend to form the foundation of automation. If a novice developer can easily run a use case, then the process scheduler (cron) probably can also run it.


Written by catena

18 February 2007 at 0202