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Topic 12 – Module Summary and Revision Guidance Agile Development

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Agile Development

Topic 12:

Module Summary and Revision Guidance

Module Summary and Revision Guidance Topic 12 - 12.2

Topic 12 Coverage

This topic will cover:• Revision of the module objectives

• Review of the key elements of the topics covered

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The Agile Development Module Scope and Coverage

The Agile Development module will:• Provide an introduction to the principles, people,

processes and practices of Agile development

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• Prepare students for future trends in software development practices

• Reinforce understanding of the information systems development process




Module Learning OutcomesBy the end of the module students will be able to:• Understand the background to Agile development

• Understand the roles within an Agile development team

• Understand the various Agile development techniques

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• Understand an Agile development lifecycle

• Understand the principles associated with an Agile development approach

• Be able to apply an Agile development approach to a particular project scenario


What is Agile?• A family of approaches:

- DSDM Atern- Lean- FDD- XP- Scrum

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- … and others

• Collectively they address:- Engineering best practices- Leadership philosophy - Project management framework- Development framework


The Agile Manifesto We are uncovering better ways of developing software by doing it and helping others do it. Through this work we have come to value:

Individuals and interactions over processes and tools Working software over comprehensive documentation

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Working software over comprehensive documentation Customer collaboration over contract negotiation

Responding to change over following a plan

That is, while there is value in the items on the right, we value the items on the left more

www.agilemanifesto.org (2001)




What is Waterfall?• Winston Royce, 1970, wrote

a paper: “Managing the Development of Large Software Systems”

• Royce did not use the term

Feasibility

Analysis

Design

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• Royce did not use the term “Waterfall” at all

• Royce acknowledged prototyping, iteration and incremental delivery

Code

Test

Implement


What is DSDM Atern?• An Agile Project Delivery Framework that delivers

the right solution at the right time

- Any kind of project

- Focused on business benefit

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Focused on business benefit

- On-time and in budget

- Quality and rigour

- Incremental

- Collaborative


Flexing Requirements

Features Cost Time

Fixed

Traditional Approaches DSDM Atern

Fixed

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Cost Time

Quality?Quality

Features

Variable Variable




The Structure of DSDM Atern

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The Philosophy of Atern (1)

Any project …

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• must be aligned to clearly defined strategic goals

• must focus upon early delivery of real benefits to the business


The 8 Principles of Atern

Deliver on time Develop iteratively

Build incrementally from firm foundations

Focus on the business need

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Collaborate

Never compromise quality

Demonstrate control

Communicate continuously and clearly

© DSDM Consortium 2007




The DSDM Atern Lifecycle

Feasibility

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Team Roles and Responsibilities

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Product Overview

Business Focus

Management

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Solution Focus

Focus




Practices: DSDM Atern’s 5 Key Techniques

• MoSCoW prioritisation

• Modelling

F ilit t d k h

MMSSCC

WWMM

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• Facilitated workshops

• Iterative development

•Timeboxing


Practices: MoSCoW Prioritisation

MMust have

O

SShould haveCC

WWMM

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CCould have

O

WWon’t have this timeMM

SS


Practices: Modelling• Many industries use models (and prototypes) to:

- establish requirements

- confirm expectations

- test the achievability of objectives

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• Examples of models: - storyboards

- diagrams

- scale models (prototypes)

- working software (prototypes)




Practices: Facilitated WorkshopsA place where a specific job of work is done …

and a product produced.

A team-based information gathering

and decision making technique

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Interactive communication

Empowered personnel

Independent facilitator

views

consensusexchange

deliverables

decisions


Practices: Iterative Development• This is a key technique to evolve ...

- from a high level idea

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- to a delivered product

- incrementally


Practices: Timeboxing

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What is a Timebox?

A timebox is a fixed period of time, at the end of which an objective has been met.

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• The time available dictates work done

• The aim of a timebox is to make something useful!!

• A timebox is product-focused, not task-focused


Further Guidance: DSDM Atern

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Agile Project Management• Major Planning Issues

• Part 1:- Control

- Risk

• Part 2:

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Part 2:- Configuration Management

- Quality

- Testing

- Metrics

- Maintainability




What is Quality?

“Fitness for purpose”

Quality Control(testing and rejection offaulty products)

Quality Assurance(definition of productsand quality criteria)

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Quality Management and a QM system(the feedback from QC & QA to improvethe process using a system of tools, techniquesand standards etc)

SolutionQuality

Process Quality


What is a Requirement?• In simple terms, a requirement is a:

- feature

- function

service

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- service

- Constraint

• that the solution needs to perform or exhibit.


Agree to what you believe you can do

Estimating

Set realistic objectives!

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Then honour your commitments!




Summary• The Agile Development module will:

- Provide an introduction to the principles, people, processes and practices of Agile development

- Prepare students for future trends in software

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Prepare students for future trends in software development practices

- Reinforce understanding of the information systems development process


Module Learning OutcomesBy the end of the module students will be able to:• Understand the background to Agile development

• Understand the roles within an Agile development team

• Understand the various Agile development techniques

U d t d A il d l t lif l

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• Understand an Agile development lifecycle

• Understand the principles associated with an Agile development approach

• Be able to apply an Agile development approach to a particular project scenario


Topic 12 – Module Summary and Revision Guidance

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