Agile Development Blog

The other day, I noticed that the water is draining rather slowly out of my bathtub at home. That is annoying…

It means that I haven’t really kept my drain as clean as I should. Or perhaps I should be “snaking” the pipes more regularly.  One thing for sure, if I don’t get this fixed, eventually my tub will stop flowing entirely. If I try to add water, my bathtub will just overflow and I won’t be able to use it without a major plumbing expense. Ugh!

What does this have to do with my latest topic of cutting costs with Agile development? Well, I’ve been reading a great little book by Linda Booth Sweeney, When a Butterfly Sneezes. It’s a sweet, simple way to learn about systems thinking by using children’s stories for examples of various systems’ archetypes. To kick things off she uses a bathtub analogy to explain stocks and flows and how they impact one another.

Aha! That is what I care about when I am developing software!

Imagine that the faucet to my tub is all the features I am putting into my product. My bathtub is my product stock. As I add features, my bathwater level goes up. Now think of the drain as the “flow” by which I get the “stock” out to my customers.

If my drain is clogged up even a little, I can’t get the flow of features, my value, out to my customers as quickly as I’d like. And if I have a really bad situation, then I actually can’t keep adding features into my stock (my bathtub) because it will just overflow. Features (value) will never get to my customers. They’ll just end up as a major mop up for me, lots of work that doesn’t deliver anything but frustration.

So what are the clogs in my software bathtub? Defects.

A few defects unattended to will just slow down my value delivery. Not too bad. But if I allow defects to accumulate, that technical debt can bring my value delivery to a crawl. I’ve got lots of stock and yet my inattention to defects has cut off flow to my customers. Crumb.

Agile cuts costs because it requires us to keep our drain clean, not let defects accumulate. Agile guides us to not over-emphasize adding features to our tub while disregarding accumulating defect residue. Rather, we are guided to add high-quality features with a zero-defect mentality. Think of it this way -

Adding a little Scrum will help you eliminate the scum.

Now, whenever you are ready to open the drain for a release of software, there are no last minute plumbing repairs necessary to let the value flow. Keeping the drain defect-free means I can keep adding features into my stock and let them flow out anytime I want. I can even have sustainable, even continuous, inflows and outflows to and from my stock. The cost of delivery of value slowly goes down, I have sustainable and reliable flow, and all because I was willing to do a little continuous bathtub maintenance.

Don’t let defects clog your feature bathwater. Use Agile to stop the defect clogs and keep the value water flowing!

Further Reading:

• Sustainable and Successful – Top 10 Characteristics of an Agile Organization
  
• Agile Cuts Costs Through Time to Market Improvements
• Testing, Scaling and Tooling Agile – Open Space Topics from Denver