XP Fundamentals: Learning and Deciding

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来自 University of Virginia 的课程

Managing an Agile Team

433 个评分

University of Virginia

Managing an Agile Team

433 个评分

课程 3（共 5 门，Specialization 敏捷开发）

Traditional development processes often lead to team frustration and poor results. Agile offers a different approach to managing the complexity of software development. This course focuses on the day-to-day jobs of running a software development program and how leading agile methodologies (Scrum, XP, kanban) can help you do them better. From transitioning a team to agile to running sprints to managing stakeholders, this course gives you the skills you need to manage an agile team in your specific operating environment. We'll show you how to: - Think through and focus on the most important aspects of your projects and sprints - Facilitate your team’s initial and ongoing adoption of the specific agile practices that work for you - Anchor your outcomes and success criteria in durable ideas about what makes for valuable products - Support your team's transition from traditional approaches to agile - Create an agile-friendly environment across functional disciplines - Identify and manage outside stakeholder needs As a Project Management Institute (PMI®) Registered Education Provider, the University of Virginia Darden School of Business has been approved by PMI to issue 20 professional development units (PDUs) for this course, which focuses on core competencies recognized by PMI. (Provider #2122) This course is supported by the Batten Institute at UVA’s Darden School of Business. The Batten Institute’s mission is to improve the world through entrepreneurship and innovation: www.batteninstitute.org.

从本节课中

The Agile Team

This week we’ll introduce the four major jobs of software development and help you think through where to focus on each of them for successful outcomes. Then we’ll step through the leading agile methodologies--Scrum, XP, and kanban. You’ll finish the week with a deeper understanding of how to pair your project’s most important facets with the best of what agile has to offer.

Scrum Fundamentals: Roles3:55

Scrum Fundamentals: Phases7:39

Scrum Fundamentals: Burndown3:35

XP Fundamentals: Learning and Deciding4:16

XP Fundamentals: Building and Managing7:51

Kanban Fundamentals7:55

与讲师见面

Alex Cowan
Faculty & Batten Fellow
Darden School of Business

In this video we're going to talk about XP, which stands for extreme programming.

XP is a full software development life cycle methodology kind of like Scrum is.

Unlike Scrum, XP actually has a bunch of practices

that specifically relate to creating and testing software.

The software itself whereas Scrum doesn't really prescribe that.

XP was formalized in 1999,

by a book called Extreme Programming Explained which was written by Kent Beck.

And here is a great diagram that Don Wells, who was another one of the early

proponents and creators, pioneers of XP techniques, he put this diagram together.

So, like Scrum, XP prescribes iterations and in the current

version of Kent Beck's book this is at one week, so the XP iteration is at one week.

And now they also have this outer loop the idea is that,

and this is quarterly at this point.

That quarterly they look at the big picture of

what do we want to do in the next quarter, how did the last quarter go,

what are the big themes, ideas that we want to focus on in the coming quarter.

And then they're in these one week iterations.

It is very test-driven, there are daily stand-ups and

you see this pair negotiation item here.

This relates to the way that developers actually work together.

So pair negotiation refers to the process of two developers discussing approach and

figuring out what they want to do together.

Another practice that we'll talk about is pair programming where the developers

actually work together simultaneously writing the code in pairs.

There is a big emphasis on unit tests.

These are small tests that test specific functions or classes, units of code.

And you probably heard me talk about the test orientation of agile quite a lot, and

this methodology, XP, really specifically prescribes

the use of these unit tests as a way to make sure that the code is up to date,

that if it's changed and XP recommends rigorous refactoring and

doing it quite a lot, you make sure with the unit test that all the code is okay.

And you can automate them to build and know that very quickly.

You see this pair programming, which is kind of part of this negotiation process.

That's the way that this is moving from the general and

the longer loops to shorter loops.

Pair programming is a way that code is created between the parties.

Now let's talk about a few of the specific practices from XP.

There are 13 primary practices.

They use stories, much like we saw with Scrum and with Agile in general,

and they use these weekly and quarterly cycles we talked about before.

So the idea here is that these are individual units of working software,

and here sort of stepping back and a little bit looking at,

more so, the big picture, how things went, how we want them to go.

Slack, which is the practice of making sure that you have enough time not

only to finish the functionality you want to execute, but also to make sure that

you've refactored the code and the test infrastructure and the overall system.

In a way where it's getting better and better and easier and

easier to add stuff, rather than harder and harder to add stuff.

That's what slack refers to and this is a specific practice of XP,

making sure that you're always leaving enough time to refactor the code and

make it better and better, easier and easier to enhance over time.

So that you don't end up with this problem of technical debt,

that we talked about before with Scrum.

So, these are the processes, learning and deciding, and

the practices and how they relate to each other.

We've talked about before these practices of learning and

deciding are very tightly linked to each other.

In the next video, we'll go through the building and managing processes for XP.

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