Function Points and Agile Methods

Posted by Robert Merrill on September 30, 2008 under Project Set-Up | Read the First Comment

I keep getting a trickle of traffic from this post I made on an InfoQ forum back in July, so I really ought to write more on the topic (I finally did). But for now, here’s the comment that continues to spark interest.

Maybe outsiders see the lack of OUTWARD-FACING metrics, that can be compared across projects or even industry-wide. Agile thought leaders seem metrics-averse, maybe out of reaction to the way metrics have been used (and abused) in the past. As I see it, the basic four, productivity (X/effort), velocity (X/time), quality (defect/X), and value (benefit/X) still apply, and within a project, agile teams track and respond to them, in their own effective ways (measured velocity, continuous integration and automated tests, planning game). But when you need to compare projects, you need a more portable X, or what I call “an ounce of software.”

I used to do project set-up for a contracting shop that used agile methods. We needed a decent estimate before we even got the chance to establish a velocity. That estimate needed to be clearly traceable to the initial requirements, to help the client think “scope-to-budget” from the start. The estimate also needed to be tied to actual results on other projects, so it couldn’t be pressured down. Based on these requirements, I introduced Function Points. Usually dismissed with a sniff by agilists, they did just what we needed, and didn’t interfere with people and interactions at all. They also helped our initial story development by revealing gaps and implied stories

You can read the complete thread, “Agile Measurement – A Missing Practice” on InfoQ.