Software Process and Software Life Cycle

Learning software process with UPEDU

Slide 2
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1

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2000
École Polytechnique de Montréal & Rational Software

Software Process and Software Life Cycle

Key words:



Software life
-
cycle


Phases


Development cycle and evolution cycle



Software process


Discipline, activities, roles, and artifacts



Iterations


Milestones



UPEDU


RUP, standards and models.



Learning software process with UPEDU

Slide 2
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2



2000
École Polytechnique de Montréal & Rational Software



Software Process and Software Life Cycle



Understanding the Development and Evolution of Software




Defining the Software Life Cycle and the Software Process





Defining Elements of the Software Process



Integrating the Software Life Cycle and the Software Process



Customizing the Software Process



Summary


Learning software process with UPEDU

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3



2000
École Polytechnique de Montréal & Rational Software

Process of Building a House

Different Process

Same life cycle


Learning software process with UPEDU

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

2000
École Polytechnique de Montréal & Rational Software



Software Process and Software Life Cycle



Understanding the Development and Evolution of Software




Defining the Software Life Cycle and the Software Process



The Software lifecycle



The Software process





Defining Elements of the Software Process



Integrating the Software Life Cycle and the Software Process



Customizing the Software Process



Summary


Learning software process with UPEDU

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5



2000
École Polytechnique de Montréal & Rational Software

Phases of the Development Cycle

T I M E

Transition

Construction

Elaboration

Inception


Inception

-

Define the scope of project

Elaboration

-

Plan project, specify features, baseline system

Construction

-

Build the product

Transition

-

Transition the product into end user community


Learning software process with UPEDU

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6



2000
École Polytechnique de Montréal & Rational Software

Inception

Elaboration

Construction

Transition

Each Phase is Marked by Milestones

Development cycle


Objective

Milestone


Development cycle


Architecture

Milestone


Initial Operational

Capability

Milestone


Product

Release

time


Learning software process with UPEDU

Slide 2
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7

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2000
École Polytechnique de Montréal & Rational Software

time

Cycles are not Strictly Sequential



An
evolution cycle

includes one execution of all four phases and produces a
software
generation



Most software systems require multiple cycles


An initial development cycle leading to the initial delivery


Subsequent evolution cycles to maintain and enhance the system



Cycles may be sequential, but more commonly overlap

Inception

Elaboration

Construction

Transition

Inception

Elaboration

Construction

Transition

Inception

Elab. . .


Learning software process with UPEDU

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8



2000
École Polytechnique de Montréal & Rational Software

New or changed

requirements

New or changed

system

Software

Process

Who is doing What, When, and How



Provides guidelines for efficient development of software

Reduces risk and increases predictability

Captures and presents best practices

Promotes common vision and culture


Learning software process with UPEDU

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9



2000
École Polytechnique de Montréal & Rational Software

Engineering and Management Disciplines

Requirements

Use
-
Case Model

Implementation Model

Implementation

Test Model

Test

Analysis & Design

Design Model

Configuration & Change Mngnt

Project Mngnt

Engineering

Management

Project

Repository


Learning software process with UPEDU

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10



2000
École Polytechnique de Montréal & Rational Software



Software Process and Software Life Cycle




Understanding the Development and Evolution of Software




Defining the Software Life Cycle and the Software Process





Defining Elements of the Software Process


UPEDU Conceptual Model


Roles, Activities, Artifacts


Disciplines



Integrating the Software Life Cycle and the Software Process



Customizing the Software Process



Summary


Learning software process with UPEDU

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11



2000
École Polytechnique de Montréal & Rational Software

Diagrams Represent Process Disciplines

Role

Activity

Artifact

Describe

a


Use Case

Use
-
Case

Package

Use Case

Use
-
Case

Specifier

A unit of work an
individual may be
asked to perform

A piece of information
that is produced,
modified, or used by a
process

A role that may be
played by an
individual or a team in
the development
organization


Learning software process with UPEDU

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12

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2000
École Polytechnique de Montréal & Rational Software

Fundamental Conceptual Model


Role

Activity

0..*

1

0..*

1

Performs

Artifact

0..*

1

0..*

1

IsResponsibleFor

0..*

0..*

0..*

input

0..*

Consumes

0..*

0..*

0..*

0..*

Produces


Learning software process with UPEDU

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13



2000
École Polytechnique de Montréal & Rational Software

Dividing the Work by Activities

Find Actors

and Use Cases

Capture a

Common

Vocabulary

System

Analyst

Develop

Vision

Manage

Dependencies

UPEDU Guideline: Process Discriminant


Learning software process with UPEDU

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14



2000
École Polytechnique de Montréal & Rational Software



Software Process and Software Life Cycle




Understanding the Development and Evolution of Software




Defining the Software Life Cycle and the Software Process





Defining Elements of the Software Process



Integrating the Software Life cycle and the Software Process


Disciplines and Phases


Iterations


Opportunistic and Systematic Activities



Customizing the Software Process



Summary


Learning software process with UPEDU

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15



2000
École Polytechnique de Montréal & Rational Software

2D Model of Process and Life Cycle

Project Management

Implementation

Test

Analysis & Design

Life Cycle Phases

Engineering Disciplines

Supporting Disciplines

Configuration & Change Mgmt

Requirements

Elaboration

Transition

Inception

Construction


Learning software process with UPEDU

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16



2000
École Polytechnique de Montréal & Rational Software

Weight of Disciplines in Iteration Varies

Project Management

Implementation

Test

Analysis & Design

Life Cycle Phases

Engineering Workflows

Supporting Workflows

Configuration & Change Mgmt

Requirements

Elaboration

Transition

Inception

Construction

ITERATION A


ITERATION E



Learning software process with UPEDU

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17



2000
École Polytechnique de Montréal & Rational Software

Artifacts Evolve in the Development Cycle

Management artifacts

Requirements artifacts

Design artifacts

Implementation artifacts

M

R

D

I



:

:

:

:

Inception

R

D

I

M

Construction

R

D

I

M

Transition

R

D

I

M

Elaboration

R

D

I

M

An
iteration

is a distinct sequence of activities with an
established plan and evaluation criteria resulting in an
modified artifacts


Learning software process with UPEDU

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18



2000
École Polytechnique de Montréal & Rational Software

Systematic or Opportunistic Iterations

O
p
p
0
r
t
u
n
i
s
t
i
c

M

R

D

I

D

D

M

R

M

I

R

R

D

I

I

M

M

D

I

D

M

Possible opportunistic sequences

D

M R D I

Systematic sequences


Learning software process with UPEDU

Slide 2
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19



2000
École Polytechnique de Montréal & Rational Software



Software Process and Software Life Cycle




Understanding the Development and Evolution of Software




Defining the Software Life Cycle and the Software Process





Defining Elements of the Software Process



Integrating the Software Life cycle and the Software Process



Customizing the Software Process


Influential Factors in Customizing Software Process


Software Process Standards and Models



Summary


Learning software process with UPEDU

Slide 2
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20



2000
École Polytechnique de Montréal & Rational Software

Four Influential Factors

People and Organization

Product Life Cycle

Process

CMM

ISO 15504


UPEDU Concept: Tailoring the Process

Application Domain


Learning software process with UPEDU

Slide 2
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21



2000
École Polytechnique de Montréal & Rational Software

Software Process Standards and Models



IEEE std 1074
-
1995 processes


Project management


Pre
-
development


Development


Post
-
development


Integral



Models


Waterfall


Spiral


Incremential


Prototyping

UPEDU Concept: Effects of implementing a Process


Learning software process with UPEDU

Slide 2
-
22



2000
École Polytechnique de Montréal & Rational Software



Software Process and Software Life Cycle



Understanding the Development and Evolution of Software




Defining the Software Life Cycle and the Software Process





Defining Elements of the Software Process



Integrating the Software Life cycle and the Software Process



Customizing the Software Process



Summary


Learning software process with UPEDU

Slide 2
-
23



2000
École Polytechnique de Montréal & Rational Software

Wrap up


Software process versus Software life
-
cycle



The phases of a software life
-
cycle



The disciplines of a software process



The components of a discipline



Development cycle vs evolution cycle



Interaction between the disciplines and the phases



Iterations and software proceses



Various models and standard on software process and software life
-
cycle