WorldCup 2014 Retrospective: The Magic about Mindset and Leadership

Paul Takken

This weekend preparing this bjohan-cruijff-hollande-1974logpost, I ran into a brilliant quote from Johan Cruijff. At a conference a few years ago for the Dutch local government, he told a great story about a talented blind golfer, Ronald Boef he played golf with.  Despite his handicap, Ronald Boef played his best golf in difficult mental circumstances like playing balls over a big pond or consistent putting. The conclusion of Johan Cruijff: "Ronald doesn’t “see" the problems, he is only focussing on the next target. He thinks from a positive mindset".   I couldn’t agree more.  In my opinion, this is one of the fundamentals behind eXtreme Manufacturing (XM) and the reason why the Dutch team didn’t made it through the WorldCup finals.

Like many consultants, topsport is an inspiring source for me.  Almost every day I show or tell stories from great sport coaches like Marc Lammers or Johan Cruijjff.   Like every major sports event, also this WorldCup in Brasil contained some interesting lessons for me I wanted to share with you.
 Read more

Why Little's Law Works...Always

Pieter Rijken

On the internet there is much information on Little's Law. It is described an explained in many places [Vac]. Recently, the conditions under which it is true got  attention [Ram11]. As will be explained in this blog the conditions under which the law is true are very mild. It will be shown that for teams working on backlog items virtually there are no conditions.

Why does it work? Under what conditions does it hold?

 Read more

Bootstrapping and monitoring multiple processes in Docker using monit

Mark van Holsteijn

If you have every tried to start a docker container and keep it running, you must have encountered the problem that this is no easy task. Most stuff I like to start in container are things like http servers, application servers and various other middleware components which tend to have start scripts that daemonize the program. Starting a single process is a pain, starting multiple processes becomes nasty. My advise is to use monit to start all but the most simple Docker application containers! When I found monit while delving through the inner works Cloud Foundry, I was ecstatic about it! It was so elegant, small, fast, with a beautiful DSL that I thought it was the hottest thing since sliced bread! I was determined to blog it off the roof tops. Until.... I discovered that the first release dated from somewhere in 2002. So it was not hot and new; Clearly I had been lying under a UNIX rock for quite a while. This time, the time was right to write about it!  Read more

Applying Little's Law in Agile Games

Pieter Rijken

Have you ever used Little's Law to explain that lower WiP (work in progress) limits lead to shorter cycle times? Ever tried to illustrate Little's Law in an Agile game and found it doesn't hold? Then read this blog to discover that it is exactly true in Agile games and how it really works.

Some time ago I gave a kanban workshop. Part of the workshop was a game of folding paper airplanes to illustrate flow. To illustrate Little's Law we determined the throughput, cycle time and work in progress. To my surprise the law didn't hold. Not even close. In this blog I want to share the insight into why it does work!

 Read more

Create the smallest possible Docker container

Adriaan de Jonge

When you are playing around with Docker, you quickly notice that you are downloading large numbers of megabytes as you use preconfigured containers. A simple Ubuntu container easily exceeds 200MB and as software is installed on top of it, the size increases. In some use cases, you do not need everything that comes with Ubuntu. For example, if you want to run a simple web server, written in Go, there is no need for any tool around that at all.

I have been searching for the smallest possible container to start with and found this one:

docker pull scratch

 Read more

Dockerfiles as automated installation scripts

Mark van Holsteijn

Dockerfiles are great and easily readable specifications for the installation and configuration of an application. It is terse, can be understood by anyone who understands UNIX commands, results in a testable product and can easily be turned into an automated installation script using a little awk'ward magic. Just in case you want to install the application in question on the good old fashioned way, without the Docker hassle :-)
 Read more

How architecture enables kick ass teams (1): replication considered harmful?

Gero Vermaas

At Xebia we regularly have discussions regarding Agile Architecture? What is it? What does it take? How should you organise this? Is it technical or organisational? And much more questions… which I won’t be answering today. What I will do today is kick off a blog series covering subjects that are often part of these heated debates. In general what we strive for with Agile Architecture is an architecture that enables the organisation to keep moving fast and without IT be a limiting factor for realising changes. As you read this series you’ll start noticing one theme coming back over and over again: Autonomy. Sometimes we’ll be focussing on the architecture of systems, sometimes on the architecture of the organisation or teams, but autonomy is the overarching theme. And if you’re familiar with Conways Law it should be no surprise that there is a strong correlation between team and system structure. Having a structure of teams  that is completely different from your system landscape causes friction. We are convinced that striving for optimal team and system autonomy will lead to an organisation which is able to quickly adapt and respond to changes.

The first subject is replication of data, this is more a systems (landscape) issue and less of an organisational issue and definitely not the only one, more posts will follow.

 Read more

How combined Lean- and Agile practices will change the world as we know it

Paul Takken

You might have attended this month at our presentation about eXtreme Manufacturing and the keynote of Nalden last week on XebiCon 2014. There are a few epic takeaways and additions I would like to share with you in this blogpost.

Epic TakeAway #1: The Learn, Unlearn and Relearn Cycle Like Nalden expressed in his inspiring keynote, one of the major things for him to be successful is being able to Learn, Unlearn and Relearn every time again. In my opinion, this will be the key ability for every successful company in the near future.  In fact, this is how nature evolutes: in the end, only the species who are able to adapt to changing circumstances will survive and evolute. This mechanism makes for example, most of the startups fail, but those who will survive, can be extremely disruptive for non-agile organizations.  Best example for this is of course Whatsapp.  Beating up the Telco Industry by almost destroying their whole businessmodel in only a few months. Learn more about disruptive innovation from one of my personal heroes, Harvard Professor Clayton Christensen.

 Read more

Mocking a REST backend for your AngularJS / Grunt web application

Lammert Westerhoff

Anyone who ever developed a web application will know that a lot of time is spend in a browser to check if everything works as well and looks good. And you want to make sure it looks good in all possible situations. For a single-page application, build with a framework such as AngularJS, that gets all it's data from a REST backend this means you should verify your front-end against different responses from your backend. For a small application with primarily GET requests to display data, you might get away with testing against your real (development) backend. But for large and complex applications, you need to mock your backend.

In this post I'll go in to detail how you can solve this by mocking GET requests for an AngularJS web application that's built using Grunt.

 Read more

How Agile accelerates your business

Daniel Burm

This drawing explains how agility accelerates your business. It is free to use and distribute. Should you have any questions regarding the subjects mentioned, feel free to get in touch.
Dia1