Agile Methodologies: Comparative Study and Future Direction 林佳蓁 資工 4B

Introduction Agile Methodologies: Iterative, Incremental, review 1.Extreme Programming (XP) 2.Scrum 3.Rational Unified Process (RUP)

Extreme Programming (XP) XP is an agile model which believes in continuous communication between project team members and stakeholders, continuous feedback, simplicity and respect. Simplicity helps software programmers to look for simple solutions to the problems faced in the project life. Continuous communication between customers and project team enables the developers to carry on the project on right direction to fulfill the client requirements and support reducing paper work.

SCRUM Scrum is used in organizations that are not dependent on deadlines. Scrum provides a methodology that regulates the set of best practices in such a way to work together and gain the beneficial possible outcomes of a project. This methodology is based on iteration, which is a short round or cycle of repetitive constructs in which ease cycle ends with a functional output.

Rational Unified Process “RUP” RUP is generally represented in two dimensions. The horizontal axis represents the process lifecycle based on schedule throughout the development phase of the project. On the other hand, the vertical axis represents the logical grouping of different activities depending on their nature.

Comparison (XP, SCRUM, RUP) XP (Development practices) Scrum (Management Strategy) RUP (Process Framework) Objective areaThe Customer Drives It’s all about the Code Communication and Empowerment Team/Management Interactions Well Engineered Development Management Real Motivation Customers make all business decisions. Developers make all technical decisions. Make iterations as short as possible so that Customer can drive with rapid feedback. Changes may be hard to make, so identify them as soon as possible. Developers know how to develop, so just stay out of their way and let them do it Make 30-day. Making mistakes is expensive, so make sure you know what you want to do before you do it. A good solid system has a good solid architecture. Plans and Budgets are hard to follow, things change, so be iterative and incremental.

XP (Development practices) Scrum (Management Strategy) RUP (Process Framework) Common Activities Produce User Stories Release Planning Planning Game (iteration planning) Development Spike Solution Run Acceptance Tests Sprint Planning Sprint Daily Scrum Sprint Review Consists of cycles Development phases, Project Management, analysis, requirements, Design, Code, Test Activity ． Analysis and Design ． Business Modeling ． Implementation ． Project Management ． Requirements ． Test CycleThe length of an iteration in XP is usually 1-3 weeks Each sprint (iteration) is a complete cycle. Formal Cycle is defined across 4 phases, but a few concurrent workflows are possible too Comparison (XP, SCRUM, RUP)

Discussion and Future Work Agile methodologies’ main focus is on stakeholder satisfaction and user requirements as well as on organization objectives. XP, Scrum and RUP are the most widely adapted practices of agile development methodologies.