Extreme Programming: Short Cycles

cyclesIn our world of digital technologies, things move fast and so do the needs of our customers. Thus, as professional software developers, we have to adapt our way of working on a project, being responsive to change is key.

For this kind of development environment, some project management models are no longer up to the task, like the Waterfall of the V-Model for example. To follow the Agile Software Development Manifesto, Extreme Programming (X.P.) is based on short development cycles.

By doing so, the development teams are able to produce new features for their products at a regular interval. The short cycles of X.P. are all about feedbacks, with them you can focus on the tasks/improvements that will provide the most value for your customers and for your company.

X.P. defines two “high-level” cycles for the development process, the iteration plan and the release plan.

The Iteration plan

An iteration is a period of time (1 to 3 weeks) during which the development team work on a set of user stories defined during an iteration planning.

The features to work on during an iteration are picked by the business analysts depending on the budget the team has. In this case the budget represent the amount of work the team can achieve for the given period.

When the next iteration is defined, the feature to produce should not change nor the priority of them. This way the developers can cut the user stories into different tasks and focus on them.

The Release plan

The user stories completed by the development teams have to be released in order to improve the products and to add value. This is defined during a release plan.

A release contains the work of several iterations, the user stories are chosen during the release planning and as the iteration planning the amount of work to achieve should not exceed the budget the teams have. The order of implementation of the user stories is defined for the release at this moment.

Once a release plan is defined the first iteration of it can be planned as well. The content of a release can change, some user stories might be cancelled, others might be introduced or the priority for some might change. Yet this should not have impact on the current iteration.

Extreme Programming like others “agile” methodologies is focused on delivering value at regular interval. To do so it requires short development cycles to allow feedbacks to happen regularly by releasing new features quickly. This is achieved by defining a release plan and several iteration plans in it.

See you next time!

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