Software Engineering
Bloom Filters, Hierarchical Profiling, Synopses & One pass distinct sampling, jumping the GAPP … – feast for DBAs (considered harmful..)
It’s Monday night and a select company of DBAs and Database developers have gathered at AMIS HQ in Nieuwegein for the ‘Looking Back at Hotsos 2009′ session. It is one of those sessions that has a lot of energy, laughter and a wealth of serious content. Four very experienced speakers relate their best experiences and most important learning points from the Hotsos conference. And the audience is allowed to participate. Speakers are Marco Gralike, Toon Koppelaars, Gerwin Hendriksen and Jeroen Evers.
The evening brings us – apart from a quite good dinner – interesting topics such as Bloom Filters, Hierarchical Profiling,..
(note: the text in the title between parentheses are for insiders only)
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IETester: Develop and test your site for multiple versions of Internet Explorer
When developing or testing your web application, you often have to support different browsers and versions. On Window machines testing for different versions of Firefox, Opera and Chrome is not a real problem as these browsers all allow you to install different versions on one machine. Only Internet Explorer (IE) is always a bit more difficult, because it’s integrated in the OS (Windows) of the machine. This mostly ends up installing multiple IE versions on multiple (virtual) machines, which is not a nice way of working when developing. Can we do this different and easier? Yes, we can!
Update (4-4-2012): IETester now supports IE 5.5 up to IE 10!
Agile software development, the principles. Principle 9 : Continuous attention to technical excellence and good design enhances agility
This is the ninth of 12 posts about the principles of agile software development. Purpose is to go back to the start of the agile manifesto (http://agilemanifesto.org/principles.html) and discuss the implementation of the 12 principles in real life software engineering. Goals of agility are to go deliver software of higher quality, faster, with a higher acceptance to end-users and able to follow the changing business requirements to strive for competitive advantage.
The question is: is this going to work in practice or is this only based on a nice marketing and sales story.
Principle 9: Continuous attention to technical excellence and good design enhances agility.
The first time I looked at this principle I thought: “How is this possible”. Agility focuses on quickly delivering working software (reading: “Quick and dirty”). I experienced this is not true. Attention to technical excellence is making the agile process working better. Technical excellence can make the development process more flexible. In this context I would like to point out that there is a difference between technical excellence / good design compared to complex design and technical complexity. How many More >
Agile software development, the principles. Principle 8: Agile processes promote sustainable development. The sponsors, developers, and users should be able to maintain a constant pace indefinitely.
This is the eight of 12 posts about the principles of agile software development. Purpose is to go back to the start of the agile manifesto (http://agilemanifesto.org/principles.html) and discuss the implementation of the 12 principles in real life software engineering. Goals of agility are to go deliver software of higher quality, faster, with a higher acceptance to end-users and able to follow the changing business requirements to strive for competitive advantage.
The question is: is this going to work in practice or is this only based on a nice marketing and sales story.
Principle 8 : Agile processes promote sustainable development. The sponsors, developers, and users should be able to maintain a constant pace indefinitely
Sustainable development means constant production of softwarefeatures during a long lasting period. This is done without loss of concentration within the team or a rising amount of errors as a result of fatigue or frustration. Software development is like running a marathon and not 100 meters sprint. You have to keep up to speed but not run so fast that you exhaust yourself or your team members.
I (and many of my colleagues) recall working on More >
The influence of the experience economy on IT architecture
AMIS is puting more and more emphasis on IT architecture. That is one of the reasons why I am doing my Masters in IT architecture and why AMIS is starting a knowledge center about IT architecture. The following paper is written for one of the masterclasses (Applying Architecture) that I have followed so far.
IntroductionCompanies that are able to provide their customers an experience by providing emotionally and psychologically gratifying products perform well in the currently very competitive marketplace (Free, 2006). Companies like Apple, Disney and Starbucks are able to sell their products based on an added user experience. Customers are willing to pay more for products largely based on the emotions that these products raise to their buyers. Maybe Apple is one of the most well known companies that excel in delivering an added experience with their products. Apple customers identify themselves with the companies’ products. They want to show that they are different (European Centre for the Experience Economy, 2005).This paper describes how the experience economy influences the role of an IT architect. (more…)
Agile software development, the principles. Principle 7: Working software is the primary measure of progress.
This is the seventh of 12 posts about the principles of agile software development. Purpose is to go back to the start of the agile manifesto (http://agilemanifesto.org/principles.html) and discuss the implementation of the 12 principles in real life software engineering. Goals of agility are to go deliver software of higher quality, faster, with a higher acceptance to end-users and able to follow the changing business requirements to strive for competitive advantage.
The question is: is this going to work in practice or is this only based on a nice marketing and sales story.
Principle 7: Working software is the primary measure of progress. How do you measure progress in agile projects? The required functionality is not fixed and the planning of construction and delivery of these requirements is done by the team, in a very late stage. This is something traditional project managers have a hard time to cope with. They think it is impossible to control a project, with an unclear outcome and a planning, that is based upon a work backlog and the duration of a sprint (iteration).
The fundamental measure of progress is measuring things that are finished. Software (in our More >
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