Friday, August 26, 2011
Too big to fail
Sunday, July 10, 2011
Style and substance
Leather seats are not unimportant. They are one of the first things that a person notices about a car, and have a big impact on the driver's and passengers' experience. However, car owner's experience is more than just driving and riding in that car: most car owners also have to survive an accident or a dozen while in the car, handle service and repairs for the car, and occasionally drive in adverse conditions where good handling becomes extremely important.
If a car was a piece of software, the leather seats would be a feature. Engine, handling and protection for the passengers provided by the strong body of the car would all be parts of the architecture. Many people, when thinking about software, tend to consider its features, and nothing else. When these people are product owners or project managers, the product features get a lot of thought and resources, while architecture evolves like a weed, with little care and hardly any testing.
Let me continue with the car analogy: an automobile can have the best-quality leather in the world on its seats and also be a complete lemon. The wonderful seats won't make the car run, be safe or reliable. Same goes for software projects: great features do not guarantee usefulness, user satisfaction, or return on investment. While features of an application make or break users' experience, the software, like a car, must also work, handle its load gracefully, and protect its owners and users from failures. And that takes effort: time, resources, and careful thought about software architecture.
Sunday, June 5, 2011
Ideas on software usability: power of a nudge
A nudge is a suggestion, a small incentive, but it can have big consequences on the outcome.
Placing certain products at or just above eye level in the shop is a nudge to consider these (presumably, most profitable) items first. Placing broccoli early in the lunch line-up leads people to get it more often, improving nutrition. Automatic enrollment in 401k is a strong nudge to save for retirement, since the money will go in automatically. Enrollment in a gym isn't much of a nudge, but signing up for a group exercise class or sessions with a trainer may work as a nudge and encourage attendance.
The nudge can come from a policy, from a physical environment, or from software. Mozilla Thunderbird is smart enough to nudge the user to actually attach a file if it finds the word "attachment" in the text. Amazon.com and many other online retailers learned to nudge customers to write reviews, and to rate reviews left by others. Word processors nudge users to correct the spelling and sentence syntax by visually marking unknown letter sequences.
However, there is plenty of software that is less helpful than it could be if it was to nudge the user to follow better practices.
- PowerPoint offers no nudges to produce good presentations - small font is as easy to reach as large, bullets go in indefinite layers with no suggestions to keep it simple.
- Modern IDEs have a lot of great capabilities to help write readable code, but don't yet automatically generate nudges to rename and refactor.
- Software like Infinitest nudges the developer to update unit tests regularly to keep them passing, but not to write new ones.
- Neither Wordpress nor Blogger.com nudge to limit the size of the blog post, suggest pagination, and do not remind to include pictures (but not too many pictures).
Behavioral research shows that nudges work. Yet, in order to work and improve performance, nudges need to be carefully designed and created. Software design industry is currently in the early stages of learning how.
Wednesday, April 27, 2011
A case for testing
It is hard to value the information, therefore, it is considered to be of low value. It is easy to value the results of system improvements, therefore, they are valued highly. As long as this mindset persists, the software industry will continue to under-test, and produce low-quality product that behaves unpredictably.
These thoughts are inspired by the recent news about Sony Playstation network compromised and subscribers' data possibly breached, private data of Texas employees handled unencrypted and left on publicly accessible website for months, Intuit's Quickbook service unavailable for many days earlier this spring.
Monday, February 21, 2011
Do you like to share?
The other day, I witnessed a professional instructor leading a group workshop refuse to let a person observe the class without fully participating (read: paying). The workshop was focused on active student-teacher interaction, with hands-on work and individual attention being the key elements. A person quietly listening in was not getting anything remotely close to the full benefit of the class, and there was no additional burden on the teachers. There was plenty of space in the room. Yet, that instructor felt that his work was somehow compromised by someone hearing what he had to offer for free.
It used to be the norm that people would guard their respective tools of the trade from colleagues, to prevent others from “stealing” their jobs. A database specialist would smile mysteriously when asked to please use SCM for his scripts, and a sales person would take her Rolodex home every night. Coders would get upset if others wanted to review their code, or ask permission to watch over their shoulder.
It seems that a lot of people in software industry have moved on to become more open about their work. We write blogs and produce podcasts to share hard-acquired knowledge, participate in question–answer forums to help others, and deliver talks at various user groups to all who cares to listen. Code reviews, while are not exactly industry standard just yet, are widely deployed in more progressive environments and are rarely considered disrespectful in and of themselves.
The perception of what is a skill has recently shifted from what a person owns – bits of knowledge and ideas – to what a person can do with these knowledge and ideas. The skill is what enables a person to provide value, either by applying his knowledge and ideas to creating or improving a product directly, or by sharing with others.
As for the teacher who refused to let the person observe the workshop, he is well behind the times. And he lost a potential student that day.