Building Magic Funnels, Part 1 29

Posted by tottinger Fri, 18 Apr 2008 02:38:00 GMT

The idea of a magic funnel, as you may remember, is that there is some kind of organizational structure where many ideas and proposals and issues go into the top. Through some magic, the item that emerges from the bottom of the funnel (to go to the development team) is the single most important thing they could work on next.

This is all just backlog management and prioritization, of course. But I think it can be simpler than I’ve seen it in the past, and that real people working without magic can approximate it.

Recently, I’ve been working to establish another magic funnel. One of the first things we did was to find the person who formerly handed out work to the developers and made him a single point of contact. In our case this is not the scrum master, but is another trusted line-manager type. He has been given a number of people to work with on the Customer side of the house and also works with technical people.

We have tried to establish story feeds from all the various stakeholders. Developers, operations people, technical writers, customers, sales people, marketing people, inside security consultants, and others have been feeding their ideas in to our point-of-contact man. This part of the funnel is working fairly well.

The next thing we have tried to do is to match the feed of work to the rate at which work can be done. This has created a fair amount of back-pressure on the stakeholders (which I believe to be healthy).

We have also worked on making the bottom of the funnel narrow, meaning that our guy doesn’t scatter new work to the team, but feeds it through the scrum master who protects the team’s productivity and keeps the work flow and tasks visible on the status board. He makes sure that the team is not expected to “absorb” changes, but that adding two points of work to the iteration results in two points of unstarted work coming off. This also creates a healthy back-pressure.

As a pun on “in-flight”, I named another area of the board “flying standby”. This is for stories that aren’t important enough to swap a story off the board (or for stories that are displaced by more important ones). If the developers finish more work than they expected, there are stories that can be picked up even though they’re not a scheduled part of the iteration. Stakeholders are told that there is no guarantee of these stories being picked up at all in this iteration, but there is some small chance that it could happen if the team discovers that it has overestimated some other stories.

The bottom of the funnel is working pretty well.

What’s missing is the “magic” bit.

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