Pragmatic agile model driven development using smart use cases

transcript

@aahoogendoorn

Sander HoogendoornPrincipal Technology Officer, Global Agile Thought Leader Capgemini

PRAGMATIC AGILE MODEL DRIVEN DEVELOPMENT USING SMART USE CASES

2Sander HoogendoornMe

Dad (3)

Programmer, trainer, coach, architect

Books (3)

Articles (+250)

International conferences (+100)

Capgemini

Principal technology officer

Global design authority agile

www.sanderhoogendoorn.com

www.smartusecase.com

www.speedbird9.com

@aahoogendoorn

4On being a developer...

5Agenda Agile. How does it work?

Agile requirements and modeling?

The backlog. Where does it come from?

User stories. An agile requirements anti-pattern

Smart use cases

Different levels of use cases

Standardizing and stereotypes

Estimating smart use cases

The backlog revisited. Where does it come from?

Automating test design

Generating code from agile requirements

In retrospective

6Agenda. Demo’s Agile. How does it work?

Agile requirements and modeling?

The backlog. Where does it come from?

User stories. An agile requirements anti-pattern

Smart use cases

Different levels of use cases

Standardizing and stereotypes

Estimating smart use cases

The backlog revisited. Where does it come from?

Automating test design

Generating code from agile requirements

In retrospective

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AGILE. HOW DOES IT WORK?

8Agile. Backlog

9Agile. Iterations

10Agile. In iteration

11Agile. Iteration backlog

12Agile. Working in iterations

13Agile. New work items

14Agile. Remaining work items

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WHAT ABOUT AGILE REQUIREMENTS AND MODELING?

16Scrum

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THE BACKLOG.WHERE DOES IT COME FROM?

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AND ON THE SEVENTH DAY KEN CREATED THE BACKLOG

19The automagical backlog

20The automagical backlog

21Agile. Where does the backlog come from?

22Preliminary iterations

23Preliminary iterations

24Smart

Create

project

proposal

project plan

Deliver

working

software

Stabilize

software

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An agile requirements anti-patternUSER STORIES

26User stories

27User stories. The approach

28User stories in complex system landscapes

Often too unstructured

Unsuitable in complex environments

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Part I. From scope to smart use casesSMART USE CASES

30Levels of requirements

31Agile requirements. Approach

SmartUse Cases

Project

Use Cases

Hierarchical

Processes

Hierarchical

Processes

Chronological

Processes

Cloud Level Kite Level Sea Level Fish Level

32Identifying scope at cloud level

33Cloud level

34Kite level

35Modeling smart use cases. Sea and fish level

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Modeling at different levels of granularitySMART USE CASES

37Different levels of use cases

User goal

Sub function

38Different levels of use casesTraditional

use cases

Format Textual Visual

Granularity Different Unified

Estimate Hard Easy

Unit of work Lousy Good

Reuse Incidental Normal

Traceability Possible Normal

Testability Poor Good

39Identifying sub-function level use casesGuidelines for identifying sub-function level use cases

Identify re-use

Model one form per use case

Model one use case per functional web part

Isolate unknown functionality

Identify complex functionality

Show reporting

Model complex calculations

Isolate interaction with others

Avoid low level (database) interaction

41Smart use cases. Stereotyped

42Smart use cases. Service orientation

43Identifying reuse

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Thinking in stereotypesSMART USE CASES

45Smart use case stereotypes

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Using www.speedbird9.com

DEMO THE BACKLOG REVISITED.WHERE DOES IT COME FROM?

47Filling the backlog (www.speedbird9.com)

48www.speedbird9.com

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ESTIMATING SMART USE CASES

50Estimating smart use cases

51Estimating smart use cases

52Standardizing estimationEstimating smart use cases

while modeling

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Using Enterprise Architect, Tobago MDA

DEMO GENERATINGYOUR ESTIMATES

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Part II. Implementing smart use casesSMART USE CASES

55The smart use case life cycle

Define work

on use case

test cases

Generate

and build

use case

test cases

Adjust

use case

Describe

use case

Accept

use case

56Analysis & Design. Writing use cases

57Test Design. Test scenarios for smart use cases

58Test Design. Testing smart use cases

59Test Design. Test cases for smart use cases

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Using Sparx’ Enterprise Architect

DEMO AUTOMATING SMART USE CASE TEST DESIGN

62Writing smart use cases. Using Enterprise Architect

Alternative flows

Exception flows

Basic flow

Fields on form

with smart use cases

Smart use case

specific business rules

and validations

65Test scenarios for a smart use case

66Testing a smart use case. Using Enterprise Architect

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CAN WE GENERATE CODE FROM (AGILE) REQUIREMENTS?

68Can we generate code from (agile) requirements?Why generate code?

Higher productivity?

Higher quality?

Get rid of repetitive work?

Prototyping?

Prerequisites to generating code

Standardize, standardize, standardize

A decent and pragmatic model

A simple code generator

A straightforward templating language

Templates!

Clear and present software architecture

Frameworks to back up your software architecture

Presentation

Process

Domain

Data / Services

Outside world

UserControls

Panels

Use cases

Workflow

Domain objects / Entities

Factories / Repositories

Enums / Value objects / Smart references

Data / Service gateways

Service locators

[Mapping]

Databases

Services / ESB

Exact SAP BizTalk Java

70Using Tobago MDA

71Model driven development - Templates

Use cases

Domain

objects

Data / Serviceclasses

Databases

Software Architecture

TobagoMDA

scenario’s

FrameworksSpecifications

Existing

Applications

Businessmodels

DomainModel

Smartuse cases

User interface

specification

1. Map

business processes

to smart use cases

2. Set up

domain model3. Refine

software

architecture(s)

4. Generate

code using

a text template engine

5. Finalize

application

73Generated code in ASP.NET

74Generated code Windows 8

75Generating code. Twitter Bootstrap & JSF

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Using Enterprise Architect, Tobago MDA, Visual Studio 2013

DEMO GENERATING CODE FROM SMART USE CASES

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IN RETROSPECTIVE?

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www.sanderhoogendoorn.comwww.smartusecase.comwww.speedbird9.com

sander@ditisagile.nl

@aahoogendoorn

REFERENCES AND QUESTIONS