CRYSTAL CLEAR ALISTAIR COCKBURN PDF

Introduced by Alistair Cockburn, Crystal Methods, which is a collection of Agile software development approaches, focuses primarily on people and the interaction among them while they work on a software development project. There is also a focus on business-criticality and business-priority of the system under development. However, it is not only the people or the processes that are important, rather the interaction between the two that is most important. Crystal believes that software development is essentially a human activity, so people involved in this activity are vital while the processes should be modelled to meet the requirements of the team, not the other way around. Crystal emphasizes that development teams are self-sufficient and self-organizing, so they are capable of streamlining the processes as the development process progresses and become more organized and competent. Instead, it believes in keeping things light and focusing on developing business-valued and functional software.

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They formed the Manifesto that comprises four core values and 12 principles. But did you know that one of the most represented approaches amongst them was called Crystal? From this research, he constructed a family of methodologies, along with principles for tuning them. He called this family of methodologies Crystal. All of the approaches within the Crystal family of methodologies are centred around people and communications, but the approaches vary according to three dimensions: team size, criticality, what the priority of the project is.

The basic premise is that the more people you have in the team, the more critical the project and the more regimented the project type is, the more structured and rigid the approach needs to be. Cockburn therefore named his different approaches after geological crystals, with harder stones such as diamonds representing the more structured approaches. Conversely, the most fluid approach was named Crystal Clear. Although you might start out using one approach, you should adjust it as team size, risk or project priorities change.

The 7 properties of Crystal Although there are whole books and training courses explaining the details of Crystal, I found one area particularly interesting: the 7 principles of Crystal. In short, they are: 1 Frequent Delivery The most important property in every project is to frequently deliver working, tested code to real users. And however good a team thinks it is, it can always improve.

Teams should work together to find out how they can improve their future working practices. Cockburn believes that by being co-located, information flows around team members so they pick up valuable and relevant information even when not actively involved. He believes that, with this, projects can operate with very little structure.

However, he does acknowledge that sometimes people need a bit of space and suggests co-located teams also have a private area that people can go. The key tenet to this is trust. If we trust people, then we are more open and will share information more freely. This kind of environment enables teams to work through their problems and improve performance. This suggests clear communication, prioritisation of requirements, goal setting, etc.

It also means reducing context switching. Even in the 90s he was talking about continuous integration so that errors could be caught within minutes. Is it because other approaches have done an amazing job on marketing: selling courses that certify people after a short course? Is it because other methods such as Scrum are more prescriptive? Is it because Scrum is easier to implement? Maybe it is partly to do with each of those.

So it requires people to be quite experienced in software development before they pick up Crystal.

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Alistair Cockburn

Naar navigatie springen Naar zoeken springen Crystal is een verzameling methoden en processen voor de ontwikkeling van software. In tegenstelling tot andere softwareontwikkelingsprocessen is Crystal geen softwareontwikkelmethode, maar, zoals gezegd, een verzameling methoden en processen. Deze verzameling wordt de Crystal Family genoemd. Crystal is uitgevonden en beschreven door Alistair Cockburn.

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What is Crystal Clear?

They formed the Manifesto that comprises four core values and 12 principles. But did you know that one of the most represented approaches amongst them was called Crystal? From this research, he constructed a family of methodologies, along with principles for tuning them. He called this family of methodologies Crystal. All of the approaches within the Crystal family of methodologies are centred around people and communications, but the approaches vary according to three dimensions: team size, criticality, what the priority of the project is.

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Crystal Clear Methodology

Easy access to expert users Technical environment with automated tests, configuration management, and frequent integration Frequent delivery[ edit ] Frequent Delivery is the regular releasing of iterations of the software program. This idea comes from agile methodologies. Designers and developers decide what features to include in each release and they design and test for each release. With Crystal methods, iterations are to be released weekly up to quarterly — the release times are dependant on the length of the project.

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Crystal Methods

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