Chet Hendrickson is the co-author of the book Extreme Programming Installed (2001). In a paper of August 2009 he discusses the XP practices he feels that have changed over the last 10 years.
That triggered me to have a small retrospective myself.
I’ve read this book in November 2003 as research for my presentation at the BeJUG’s JavaPolis of December 2003. I presented a major project in which we (very successfully) applied eXtreme Programming (truly pioneering in Belgium at that time). I read the book after Kent Beck’s books in the same series, Extreme Programming Explained (Embrace Change, 1999) and Planning Extreme Programming (2000).
Looking back today, I still find that Extreme Programming Installed lacks structure, leaves an impression of randomness, misses a good ‘story’. I distinguish 3 main parts, without these parts being marked as such:
Introducing XP with the 4 XP values (communication-feedback-simplicity-feedback), the roles (customer-manager-programmer) and highlighting the On-site Customer and User Stories
In-depth description of the 12 XP practices (13 actually as Testing was split into Acceptance Testing and Test First)
Bonus Tracks with some of the authors’ highly personal experiences and coding insights
Although the practices are core, they are only listed at the end and the coherence is mostly neglected. Although co-author Ron Jeffries drew a perfect roadmap with his alternative to Kent Beck’s representation:
My remarks on the changes that Chet identifies, are:
Views on User Stories Size have indeed evolved. My Definition of Agile Planning mentions Mike Cohn’s influence. But in Planning Extreme Programming Kent Beck & Martin Fowler had already treated the essential topics (including sizing) surprisingly well.
The Iteration Length (originally 3 weeks) has equally been given flexibility. The same goes for Scrum (30 days Sprints), that I started applying in 2004. I mostly stick to calendar month Sprints.
I agree that the Metaphor guideline has not been well adopted, despite its potential. But did it ever stand a chance, as even Extreme Programming Installed treated it marginally?
The topic of Dispersed Teams has really grown in importance. But no method (Agile or other) has ‘the’ solution. Alistair Cockburn has at least published remarkable thoughts on the communication aspects. I still refer to his Osmotic Communication.
And… I agree that the C3 pioneers havechanged the world by the formal introduction of eXtreme Programming!
Recently Scrum godfather Ken Schwaber resigned as chairman from the ScrumAlliance, which he co-founded.
I remember Ken from turning my ScrumMaster certification course in 2004 into a great experience. Not because of the certificate, but for comprehending Scrum. I’ve since then advised people to attend the certification course, but mainly to get in touch with other people and dive into the matter.
Ken launched Scrum.org as a move from ceremony and formal organization to process and community. From certification to assessment (for self-improvement). There’s an online Scrum Assessment (note: no longer available), upon a Scrum Guide. Because… “Unlike certification, assessment makes no public claim of competence and cannot be misused to assert qualifications that may or may not exist“.
I scored 69 out of 80 (86%), which took 25 minutes (1h allowed). This feels okay but the most important aspect was that through the reflection on some missed points I could improve my insights.
“Although there’s value in certification, assessment is valued more.”
An interesting poll was posted at Scrumology asking us to indicate where we consider ‘Agile’ to be on the Hype Cycle. A little note…
The presentation of my framework My.Fragility starts with a general introduction on ‘Agile’ before diving into Scrum and going beyond. This introduction ends with a maturity assessment of Agile using Geoffrey Moore’s Technology Adoption Life Cycle. The conclusion is that Agile has Entered the Bowling Alley (so has definitely Crossed the Chasm).
In 2008 I added a comparison with Gartner’s Hype Cycle for Application Development, which puts Agile in the Trough of Disillusionment and predicts a period of 5-10 years before mainstream adoption.
However, having studied and compared both models I am convinced that Agile is -at least- on its way to the Slope of Enlightenment:
Other objections I have with Gartner are:
Agile is primarily the common denominator of a number of methods and is as such not one defined method. As a practitioner of Scrum, combining it with XP and going beyond with My.Fragility, I believe these methods to be certainly farther in adoption.
A complete Agile approach covers a number of practices and disciplines that Gartner separates (e.g. various testing levels). See my indications on the Hype Cycle.
My intuition and daily experience contradict the 5-10y expectation.
Challenge: from the TALC I expect Scrum to become the Agile Gorilla…
Scrum is also in the minds of people. My mind is set on the ability of fragility. How about you?
Are you ‘management’? Then you should not only be willing to believe that a software project can truly deliver quality and business value. You should also do (a lot) more than just gather a group of programmers with a project manager on top during a (project’s) timebox.
Okay, so far for a view the community will quickly agree upon.
What is usually less focused on is the level of commitment of the actual team members. In my experience this may turn out to be at least as difficult to achieve. Because it takes the absolute will to self-organize, not wanting to depend on other people to take decisions for you (the essence of ScrumMaster facilitation versus Project Management’s execution of control), to outweigh every (technical) choice against the (business) value and functional profit, to discuss and communicate openly, etc.
Scrum is a simple way to outperform and excel but all parties should respect its essence, that I represent on my Scrum Diamond:
Kan and Ban are Japanese for Card and Signal. A Kanban (signal card) originates from the Toyota Production System (TPS) where it is a physical card that visualizes a pull question for inventory. It serves to minimize stock in a ‘Just In Time’ strategy and is a way to ‘eliminate waste’ while assuring a continuous flow of goods.
In an Agile context, a Story Card is a Kanban. Out of eXtreme Programming it grew into an established Agile practice in describing a feature. A Kanban Board holds the active Story Cards per ‘status’, thus being an Information Radiator (term by Alistair Cockburn, also my inspiration for the Games metaphor).
My Scrum Product ànd Sprint Backlog items are User Stories. (‘Minimal Marketable Feature’ is more generic, but I stick to ‘User Story’) The Sprint Backlog is made visible by sticking a printout from my (Excel) tracking model on a wall. Around the Daily Scrum (we do it standing up) each Story Lead writes the estimated time to finish a Story on the printout and I create the Sprint Burndown. That works fine. We use a Kanban Board only for feedback from functional testing. This is generally too small to create a Story (would be ‘waste’).
Velocity is a way to optimize the inventory and the continuity of work. Traditionally ‘velocity’ equals the #Story Points (gummy bears) that can be finished in one iteration (a Sprint). However, I apply an overall Velocity as a multiplicator on Story Points (ideal time) to result in #planning days. The size of the inventory (in #Story Points) for a Sprint is determined by dividing the available #planning days of a team (minus 2 slack days) by expected Velocity (Yesterday’s weather). Note: continuity is also assured by the presence of the Product Owner. He/she makes sure that no functional issue remains unsolved, on the spot!
In many (IT) partnerships and implementations people seem to prefer to strangle each other rather than assure mutual benefits.
I’m applying Scrum (over 4 years already), in my projects and in my management. It continuously helps me to cross fences; between suppliers and customers, business and IT, analysts and developers, x-layer developers and y-layer developers, etc.
In my Scrum-based development process I use Pre-Game Staging to name the barely enough preparative phase for 1 stage of software development. The “Games” metaphor was described by Alistair Cockburn in his biblical work Agile Software Development. I strongly agree with him that software development should be a Cooperative Game.
Cooperative: a team of people works together towards a common goal, not to fight each other.
Non-zero sum: the players are not opposed and do not try to win by getting the other at zero. There are multiple winners.
Finite and goal-seeking: the game ends when the goal is achieved. The game is not meant for just staying in existence.
You will find this as well in the integrated prerequisite for supplier-customer relationships (possibly multi-tier), from Toyota’s Lean Production to Poppendieck’s Lean Software Development. It offers far more certainties than our commonly applied bidding processes. Think (read) about it!