Value is placed on the developers’ well-being. On the other hand, without collective ownership the rate of evolution of the design slows dramatically. The working product will not be available till the end of development and hence nobody will have a clue on whether the right thing is being built though it is being developed rightly. Collaboration facilitates combining different perspectives timely in implementation, defect fixes and accommodating changes. Monitor the planning game, fix any deviations, modify the rules if and when required. Hence, a set of rules with the necessary goals can initially be put in place and they can be modified as the development progresses only if required. Still unsure whether XP will fit your team’s needs, even after reading its rules and values? The customers review the system to check how best it can contribute, and give feedback in days or weeks instead of months or years. Two Programmers sit together and jointly produce one artifact (design, algorithm, code, etc. Each one keeps their partner focused and on-task with no possibility of slack off. 40-hour week helps you to be focused on the right design. ExtremePlanner concentrates on planning and tracking the progress of features (or user stories) that have actual business value to customers. A pair with code ready to integrate −. Though the customer writes the requirements on user story cards, you need to listen to, Express yourself if there are possible gaps in understanding. For each project, iterations and stories can be added by both the customers and employees. Refactoring allows the design to evolve incrementally keeping it simple, removing the duplications and complexity as you notice. It is the detailed (not the only) design activity with multiple tight feedback loops through effective implementation, testing and refactoring continuously. Automated building and continuous integration. On the other hand, a person who always agrees with the partner so as not to create tension also minimizes the benefits of collaborative work. Further, Extreme Programming is more about technique than process and hence merges well with the process-centric approaches. Combined with communication, simplicity, and concrete feedback, courage becomes extremely valuable. Extreme Programming works towards providing iterative and recurrent software releases throughout the project; instead of everything together after a single, long project development … This chapter gives an overview of Extreme Programming. Stories are the primary deliverable of this level activity. Pairs use no more man-hours than singles. Refactor the system to be the simplest possible code with the current feature set. Without design, the system can get too complicated, and the dependencies within the system may no longer be apparent. Business changes − Changes are considered to be inevitable and are accommodated at any point of time. Thus, you can write all the code in pairs. The customer is at a distance or unavailable. Estimates and plans software releases with drag and drop ease. The proponents of Extreme Programming believe that if a few tests can eliminate flaws in the program, then frequent testing can determine more defects to give better results. Runs the tests until they pass (100% correct). Writing unit tests before programming and keeping all of the tests running at all times. Developers will try to define this problem and get requirements. Problems with projects often arise due to lack of communication. lead to staff-turnover. In Pair Programming, with the ‘watch over the shoulder’ technique. Continuous integration and immediately running the tests for every set of changes made by a pair ensures −, That the new code works if 100% tests pass, or. As the development proceeds and the metaphor matures, the whole team will find new inspiration from examining the metaphor. The other XP practices support Coding Standards in the following way −. Thus, plan is a result of collaboration between the customer, businessperson and the developers. You make short releases so that any mistake in the plan would have at the most a few weeks or months of impact. The following diagram shows how Extreme Programming is woven around the Extreme Programming practices −. Differences between Extreme Programming … Within that constraint, they still tend to move business priorities earlier in the development, reducing the chance that important stories will have to be dropped towards the end of the development of a release due to time constraints. Management is forced to find real solutions. While the person who is driving is thinking about implementation, the other continuously reviews code, thinks about a possible simpler design that is possible, how the current development fits in the overall system as of date. The Extreme Programming practices, such as unit testing, pair … In a similar way, in Extreme Programming as the entire project is driven by collaboration among the team members and with the business (who represents the customer), certain rules for the project need to be laid out at the beginning itself. In the 1990’s, there were two significant influences which shaped software development, where on one hand object-oriented programming took precedence over procedural programming and was widely favored by the industry. A developer may not ask the customer the right questions, and so a critical domain decision is blown. Extreme Programming … Allow the rules to evolve for better implementation. 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