What is Agile Methodology? How It Works, Best Practices, Tools

Source – stackify.com

Agile Methodology is a people-focused, results-focused approach to software development that respects our rapidly changing world. It’s centered around adaptive planning, self-organization, and short delivery times. It’s flexible, fast, and aims for continuous improvements in quality, using tools like Scrum and eXtreme Programming.

How It Works

It works by first admitting that the old “waterfall” method of software development leaves a lot to be desired. The process of “plan, design, build, test, deliver,” works okay for making cars or buildings but not as well for creating software systems. In a business environment where hardware, demand, and competition are all swiftly-changing variables, agile works by walking the fine line between too much process and not enough.

Agile Methodology Overview

It abandons the risk of spending months or years on a process that ultimately fails because of some small mistake in an early phase. It relies instead on trusting employees and teams to work directly with customers to understand the goals and provide solutions in a fast and incremental way.

• Faster, smaller. Traditional software development relied on phases like outlining the requirements, planning, design, building, testing, and delivery. Agile methodology, by contrast, looks to deploy the first increment in a couple weeks and the entire piece of software in a couple months.
• Communication. Agile teams within the business work together daily at every stage of the project through face-to-face meetings. This collaboration and communication ensure the process stays on track even as conditions change.
• Feedback. Rather than waiting until the delivery phase to gauge success, teams leveraging Agile methodology track the success and speed of the development process regularly. Velocity is measured after the delivery of each increment.
• Trust. Agile teams and employees are self-organizing. Rather than following a manifesto of rules from management intended to produce the desired result, they understand the goals and create their own path to reach them.
• Adjust. Participants tune and adjust the process continually, following the KIS or Keep It Simpleprinciple.

For training purposes, there’s a comprehensive, downloadable overview here.

Examples of Agile Methodology

The most popular and common examples are Scrum, eXtreme Programming (XP), Feature Driven Development (FDD), Dynamic Systems Development Method (DSDM), Adaptive Software Development (ASD), Crystal, and Lean Software Development (LSD). Teams generally pick one or two methods. The most widely used methodologies are Scrum and XP, which dovetail nicely.

Scrum is a hands-on system consisting of simple interlocking steps and components:

• A product owner makes a prioritized wish list known as a product backlog.
• The scrum team takes one small piece of the top of the wish list called a sprint backlog and plans to implement it.
• The team completes their sprint backlog task in a sprint (a 2-4 week period). They assess progress in a meeting called a daily scrum.
• The ScrumMaster keeps the team focused on the goal.
• At the sprint’s end, the work is ready to ship or show. The team closes the sprint with a review, then starts a new sprint.

Here’s an example of how Scrum works: Bill meets with a customer to discuss her company’s needs. Those needs are the product backlog. Bill chooses the most important tasks to work on in the next two weeks. His team meets in a daily scrum to target work for the day ahead and address roadblocks. At the end of the sprint, Bill delivers the work, reviews the backlog, and sets the goal for the next sprint. The cycle repeats until the software is complete.

eXtreme Programming. Often used with scrum, XP is an example of how Agile can heighten customer satisfaction. Rather than deliver everything the customer could ever want far in the future, it gives them what they need now, fast. XP is centered on frequent releases and short development cycles. It uses code review, pair programming, unit testing, and frequent communication with the customer.

Here’s an example of how XP works: Bill builds a list of customer requirements by having the customer tell “user stories” that outline the features. From these, he builds a software release plan. The software will be delivered in iterations, with one delivered every couple weeks. The team works in programmer pairs, using daily meetings to smooth roadblocks. The customer delivers feedback in the form of more user stories. The cycle repeats until the software is delivered.

Benefits of Agile Methodology

The benefits of Agile are tied directly to its faster, lighter, more engaged mindset. The process, in a nutshell, delivers what the customer wants, when the customer wants it. There’s much less wasted time spent developing in the wrong direction, and the entire system is quicker to respond to changes. For a more comprehensive list of benefits, see this post.

• Faster. Speed is one of the biggest benefits of Agile Methodology. A faster software development life cycle means less time between paying and getting paid. That, in turn, means a more profitable business.
• Increased customer satisfaction. With Agile, customers don’t wait for months or years, only to get exactly what they didn’t want. Instead, they get iterations of something very close to what they want, very fast. The system adjusts quickly to refine the successful customer solution, adapting as it goes to changes in the overall environment.
• Values employees. Employees whose ideas are valued are vastly more productive than those who are ordered to follow a set of rules. The Agile Methodology respects employees by giving them the goal, then trusting them to reach it. Since they’re the ones with their hands on the controls and the ones who see the obstacles that crop up every day, employees are in the best position to respond to challenges and meet the goals at hand.
• Eliminates rework. By involving the customer at more than just the phases of requirements and delivery, the project remains on-task and in-tune with customer needs at every step. This means less backtracking and less “out on a limb” time between the time we do the work and the time the customer suggests revisions.

Best Practices

The list of best practices is long and involved, with dozens of tools to pick and choose. We’ve outlined a short list of the main benefits below. For a more comprehensive best practices guide, see this article.

• Set priorities. A product backlog is a list of prioritized tasks maintained by a product owner.
• Maintain small release cycles. The product should be released in increments every 2-4 weeks, with stakeholders giving feedback before proceeding.
• Use pair programming. Two programmers work side-by-side at a single computer. This technique actually results in an identical degree of productivity to separate programming but delivers higher quality.
• Refactor. Rework code regularly to achieve the same result with greater efficiency and clarity.
• Use test-driven development. Code the unit test first to keep the project on task throughout. Test-driven development as an Agile best practice also produces greater employee engagement, since it transforms testing from a boring grind to a coding challenge.

Agile Methodology Tools

The list below shows some of the best tools on offer. For a complete list, see this post.

• ActiveCollab. An affordable tool for small businesses, ActiveCollab is easy to use. This software development aid requires little training and provides excellent support.
• Agilo for Scrum. Stakeholders get updated automatically on the project’s progress with Agilo for Scrum. Features sprint reports and burn down charts for better data mining.
• Atlassian Jira + Agile. This powerful project management tool facilitates development by incorporating Scrum, Kanban, and customizable workflows.
• Pivotal Tracker. This methodology tool is geared specifically for mobile projects. A little jargon-heavy, it’s user-friendly after a brief orientation period.
• Prefix. This free tool from Stackify provides an instant feedback loop to catch and fix bugs before they can deploy.
• Retrace. For a more robust solution complete with monitoring, errors, logs, and more, Stackify’s Retrace provides app performance insights from integration to QA to production, at the code level.