system thinking

On bread recipes, maps, and intentions

[I’ve been quiet for the past three weeks–not because I have less that I want to talk about, but because I have more. Major wheels turning in my head. I’m having a hard time getting from the “intuited ideas” mode to the “crisp enough to put it in writing” mode, though. Consider this a down payment on some future discussions…]

One of my mother’s talents is bread-making. She’s been kneading and baking and pulling beautiful loaves out of the oven for as long as I can remember. Bread is one of the ways she says “I love you” to family and friends.

photo credit: treehouse1977 (Flickr)

A few years back, she created a cookbook full of family recipes, and gave one to each adult child for Christmas. I was struck by how she began the bread section. Instead of launching right into the recipes, she included a couple of pages of “bread theory”, if you will. The section about water is typical:

“Water — Just about any edible liquid could be used as the base for bread. Some that come to mind are vegetable cooking water, potato water, milk, and so on. There is no problem with substituting any of these for liquid called for in a recipe, but you should keep in mind that if the liquid is salty, the salt should be adjusted; if the liquid is sweet, the sugar should be adjusted… Fresh milk can be a problem because of enzymes that would prevent yeast action. For this reason, most old recipes that call for milk specify that the milk be scalded first. This isn’t necessary if you are using water and powdered milk, but remember that the mechanics of the recipe probably depend on at least warm milk (so use warm or even hot water).”

If you’re wondering why I am writing about bread recipes in this blog that focuses on software craftsmanship, consider how much that paragraph resembles a really high-value comment in source code.

It has to do with principles and intentions.

Software is all about recipes, right?

Recipes are a lot like software algorithms (especially in imperative programming styles): First, do this; next, do that; wait 25 minutes; return new Loaf()… We even talk about “recipes” and “cookbooks” when we make catalogs of software techniques.

How is this metaphor instructive… or worrisome?

Continue reading →

Smart Geeks Think Like Cheerleaders

Technorati code: FMUS579NQBM8

Saturday I went to a high school half an hour north of our home, to watch my 16-year-old daughter compete in a cheerleading competition. And I learned something about software.

Photo credit: neys (Flickr)

I’m not sure how many teams were there–maybe a hundred. The competition started at 9 am and was scheduled to run through 5. Every team consisted of dozens of girls, all dressed in spangles and glitter, with identical ribbons in their hair. They’d march out onto the floor, drop their heads and arms to their sides, and wait for the first blast of music to initiate the routine. Then they’d tumble and dance their hearts out, finishing out of breath with a flourish.

Every hour or so, the performances suspended so judges could announce winners in a particular division that had just fielded its last competitor.

I noticed a pattern. Even though I have no knowledge of competitive cheer scoring, I could tell who had won. Continue reading →

Metrics, Plumb Lines, and System Thinking

Friday morning I was at a seminar taught by Jason Taylor, CTO at Allegiance. We were discussing how dev team velocity and product quality can compete for our attention; sometimes we trade one for the other. Jason mentioned that he’s a fan of competing metrics, and some neurons connected in my brain.

Plumb line suspended from the center point of multiple balancing legs. Photo credit: suttonhoo (Flickr)

I’m a big believer in measurement. As the old adage goes, you can’t improve what you don’t measure. Next time someone urges you to change a behavior, or tells you she’s going to, ask what measurement of change is being proposed. If you get an unsatisfying answer, I predict you’ll also get an unsatisfying outcome.

I’m also a big believer in balance, as I’ve written about before. Good software balances many considerations.

Besides these existing predispositions, I’d recently read a blog post by Seth Godin, cautioning about the need to choose wisely what we measure. And I’ve been digesting The Fifth Discipline, by Peter Senge, which advocates wholistic, systemic thinking, where we recognize interrelationships that go well beyond simplistic, direct cause-and-effect.

All of these mental ingredients Continue reading →