Basics-Software Development Methodologies- Lecture 1 Slides-Computer Engineering, Slides of Software Development Methodologies

Download Basics-Software Development Methodologies- Lecture 1 Slides-Computer Engineering and more Slides Software Development Methodologies in PDF only on Docsity!

Software Development Methodologies Lecturer:

Raman Ramsin

Lecture 1: Basics

1

Sharif University of Technology

Software Development Methodologies – Lecture 1

Software Development Methodology (SDM)Software

Development Methodology (SDM)

„

A framework for applying software engineering practices with the specificaim of providing the necessary means for developing software-intensive

p

g

y

p

g

systemsC

i ti

f t

i^

t

„

C

onsisting of two main parts:^

A set of modeling conventions comprising a

Modeling Language

(syntax and semantics)( y

)

A

Process, which „^

provides guidance as to the order of the activities, „

specifies what artifacts should be developed using the

Modeling

Language, „

directs the tasks of individual developers and the team as a whole, „

directs the tasks of individual developers and the team as a whole,and „

offers criteria for monitoring and measuring a project’s productsand a ti ities

2

Sharif University of Technology

and

activities.

Software Development Methodologies – Lecture 1

Object

- O

riented Software Development Methodology (OOSDM)

Object O e ted So t

a e

e e op

e t

et odo ogy (OOS

)

„

Specifically aimed at viewing, modeling and implementing the system as acollection of interacting objectscollection of interacting objects „

First appeared in late 1980s

pp

„

Categorized as

Seminal (First and Second Generations)

Integrated (Third Generation)

Agile

Agile

„

UML was the result of the ‘war' among seminal methodologies

g

g

„

Process has now replaced modeling language as the main contentious issue

3

Sharif University of Technology

Software Development Methodologies – Lecture 1 Genealogy: Seminal and Integrated Methodologies (until 1996)

4

Sharif University of Technology

[Webster 1996]

Software Development Methodologies – Lecture 1 UMLUML

5

Sharif University of Technology

[Graham 2001]

Software Development Methodologies – Lecture 1 Genealogy: Agile MethodologiesGenealogy:

Agile Methodologies

6

Sharif University of Technology

[Abrahamsson et al. 2003]

Software Development Methodologies – Lecture 1

Analysis: Selected Methodologies

y

g

„

Seminal Methodologies

Shlaer-Mellor (1988, 1992)

Coad-Yourdon (1989, 1991)

„

Agile Methodologies

DSDM (1995, 2003)

Scrum (1995, 2001)

RDD (1990)

Booch (1991, 1994)

OMT (1991)

XP (1996, 2004)

ASD (1997, 2000)

dX (1998)

OSA (1992)

OOSE (1992)

BON (1992, 1995)H d

M

k (1992)

Crystal (1998, 2004)

FDD (1999, 2002)

P

P tt

Hodge-Mock (1992)

Syntropy (1994)

Fusion (1994)

„

P

rocess Patterns1.

Ambler (1998)

P

M t

d l

„

Integrated Methodologies

OPM (1995, 2002)

2

Catalysis (

„

P

rocess Metamodels1.

OPF – as part of theOPEN methodology(2001)

Catalysis (1995, 1998)

OPEN (1996)

RUP (1998, 2000, 2003) /USDP (1999)

5

EUP (

(2001)

SPEM (2002)

„

MDA

7

Sharif University of Technology

EUP (2000, 2005)

FOOM (2001)

„

MDA

Software Development Methodologies – Lecture 1

ProblemsProblems „

Requirements engineering is still the weak link, and requirementst^

bilit

i^

l^

t d

traceability is rarely supported.

„

Model inconsistency is a dire problem.

„

Integrated methodologies are too complex to be effectively

„

Integrated methodologies are too complex to be effectivelymastered, configured, and enacted.

„

Agile methods are not mature enough:

g e

e

ods a e

o

a u e e oug

Unrealistic assumptions (e.g. Scrum)

Lack of scalability (All, more or less)

Lack of a specific, unambiguous process (e.g. XP, Crystal)

S

l^

d

l^

t^

i^

d b

i^

l^

th d l

i^

i^

t

„

S

eamless development, pioneered by seminal methodologies, is not

adequately appreciated and supported in modern-day methodologies.

8

Sharif University of Technology

Software Development Methodologies – Lecture 1 Methodology Development

gy

p

„

Methodologies can be categorized according to the circumstancesleading to their development, including the approach and methodapplied:

Revolutionary: novel ideas and approaches

Evolutionary: based on existing methodologies

Evolutionary: based on existing methodologies

„

Extension: adding new features to an existing methodology „

Integration: consolidating ideas from two or more methodologies

Merger

: typically carried out through a design-by-committee

procedure

Ad hoc

: features are scavenged from prominent methodologies in

order to fill the needs of the methodologist

Engineered

: based on analysis of the problem domain and

requirements thereby identified, and pre-implementation design

„

‘Software processes are software too.’

9

Sharif University of Technology

Software Development Methodologies – Lecture 1

Analysis Criteria

y

„

OOSDM Process^

Clarity, rationality, accuracy, and consistency of definition

Coverage of the generic development lifecycle activities (Analysis, Design,Implementation

Test

Maintenance)

Implementation, Test, Maintenance)

Support for umbrella activities, especially including:

„

Risk management „

Project management „

Project management „

Quality assurance

Seamlessness and smoothness of transition between phases, stages andactivities

Basis in the requirements (functional and non-functional)

Testability and Tangibility of artifacts, and traceability to requirements

Encouragement of active user involvement

g

Practicability and practicality

Manageability of complexity

Extensibility/Configurability/Flexibility/Scalability

10

Sharif University of Technology

y/

g

y/

y/

y

Application scope

Software Development Methodologies – Lecture 1

Analysis Criteria

y

„

OOSDM Modeling Language

g

g

g

Support for consistent, accurate and unambiguous object-orientedmodeling:modeling:

„

Structural – Functional – Behavioural „

Logical to Physical (business-process/problem domain to solutiondomain to implementation domain)domain to implementation domain) „

Enterprise level – System level – Subsystem/Package level – Inter-object level – Intra-object level „

Formal and Informal modeling facilities „

Formal and Informal modeling facilities

Provision of strategies and techniques for tackling model

g

q

g

inconsistency and managing model complexity

11

Sharif University of Technology

Software Development Methodologies – Lecture 1 R fR

eferences „

Webster, S., “On the evolution of OO methods”, Bournemouth University,

,^

,^

,^

y,

1996.

„

Graham, I., Object-oriented Methods: Principles and Practice (3rd Edition),

,^

,^

j^

p

(^

),

Addison-Wesley, 2001. „

Abrahamsson, P., Warsta, J., Siponen, M. T., Ronkainen, J., “New Directions

,^

,^

,^

,^

p

,^

,^

,^

,

on Agile Methods: a comparative analysis”, Proceedings of the InternationalConference on Software Engineering – ACM/ICSE 2003, 2003, pp. 244-254.

12

Sharif University of Technology