seqa-unit2a

8/13/2019 SEQA-Unit2A

1/45

Software Engineering & Quality Assurance

2A

Balasubba Raman Guruswamy


2/45

E A A,

E, BB

E & A, A A

16-Dec

-12

reRequirements

SE

QA-Unit2A-Softwa

2


3/45

E

C

reRequirements

16-Dec

-12

? C

3

SE

QA-Unit2A-Softwa


4/45

areRequirements

16-Dec-12

D

, ,

D , ,

, , 4

S

EQA-Unit2A-Softw


5/45

A

F

F

D reRequirements

16-Dec

-12

5

SEQA-Unit2A-Softwa


6/45

A .

. A , .

reRequirements

16-Dec

-12

6

SEQA-Unit2A-Softwa

1.

2.

3.

.

4. .


7/45

D

, , ,...

C , ,

D ,...reRequirements

16-Dec

-12

, .

7

SEQA-Unit2A-Soft

wa


8/45

reRequirements

16-Dec-12

8

SEQA-Unit2A-Soft

wa


9/45

,

A :

A / . reRequirements

16-Dec-12

9

SEQA-Unit2A-Soft

wa


10/45

reRequirements

16-Dec-12

,

,

SEQA-Unit2A-Softwa

10


11/45

()()

Building software is so compelling that we want to jump right in (before having a

clear understanding of what is needed) Things will become clear as we build the software

Project stakeholders will be able to better understand what they need only afterexamining early iterations of the software

16-D

ec-12

reRequirements

ngs c ange so rap y a requ remen s eng neer ng s a was e o me

The bottom line is producing a working program and that all else is secondary

A ,

, ,

SEQA-Unit2A-Softwa

11


12/45

12

B

B

A

16-Dec-12

reRequirements

, ,

SEQA-Unit2A-Softwa


13/45

reRequirements

16-Dec-12

13

S

EQA-Unit2A-Softwa


14/45

E

E

16-Dec-12

reRequirements

,

A

A S

EQA-Unit2A-Softwa

14


15/45

Inception

Elicitation

Elaboration

16-Dec-1

2

areRequirements

Requirements

Management

Validation

Specification

SEQA-Unit2A-So

ft

15


16/45

D ,

A

16-Dec-12

reRequirements

,

B

S

EQA-Unit2A-Softwa

16


17/45

?

These questions focus on the customer, other stakeholders, theoverall goals, and the benefits

16-Dec-12

reRequirements

?

?

S

EQA-Unit2A-Softwa

17


18/45

"" ?

These questions enable the requirements engineer to gain a betterunderstanding of the problem and allow the customer to voice his orher perceptions about a solution

16-Dec-12

reRequirements

C ( ) ?

?

S

EQA-Unit2A-Softwa

18


19/45

A ? A ""?

These questions focus on the effectiveness of the communicationactivity itself

16-Dec-12

reRequirements

A ? A ?

C ?

?S

EQA-Unit2A-Sof

twa

19


20/45

Inception

Elicitation

Elaboration

16-Dec-1

2

areRequirements

Requirements

Management

Validation

Specification

SEQA-Unit2A-S

oft

20


21/45

E

, , ( ""

16-Dec-1

2

reRequirements

Elicitationelicit requirements from all stakeholders

E

C

SEQA-Unit2A-Sof

twa

21


22/45

,,

A

A "" reRequirements

16-De

c-12

A " " , , , , ,

, ,

,

S

EQA-Unit2A-Sof

twa

22


23/45

, ,

16-Dec-12

wareRequirements

E :

E :

'

SEQA-Unit2A-Sof


24/45

A A

A , ,

The work products will vary depending on the system, butshould include one or more of the following items

reRequirements

16-De

c-12

A ' A ( )

A ( )

A

S

EQA-Unit2A-Softwa

24


25/45

Inception

Elicitation

Elaboration

16-Dec-12

areRequiremen

ts

Requirements

Management

Validation

Specification

SEQA-Unit2A-So

ftw

25


26/45

D ,

E , ,

16-Dec-1

2

reRequirements

Elaborationcreate an analysis model that identifies data, functionand behavioral requirements

D

,, S

EQA-Unit2A-Softwa

26


27/45

D

A , ,

A

D ,

16-Dec-12

reRequirements

(More on next slide)

S

EQA-Unit2A-Softwa

27


28/45

(), ()?

?

? ?

?

16-De

c-12

reRequirements

?

, , ?

?

? D ?

28

S

EQA-Unit2A-Softwa


29/45

homeowner

Arms / d isa rmssys tem

Accesses sys temvia Int ernet

sensors

16-De

c-12

reRequirements

Reconf igures sensors

and related

sys t em f eat ures

Responds t o

alarm event

Encounter s an

error condi t ion

sys tem

administ rator

29

S

EQA-Unit2A-Softwa


30/45

Inception

Elicitation

Elaboration

16-De

c-12

areRequireme

nts

Requirements

Management

Validation

Specification

30

SEQA-Unit2A-S

oft


31/45

D ,

(.., ) , ,

16-De

c-12

reRequirements

, , /

31

S

EQA-Unit2A-Softwa


32/45


33/45

F

D

16-Dec-1

2

reRequirement

s

B B

S

EQA-Unit2A-So

ftwa

33


34/45

Inception

Elicitation

Elaboration

16-Dec

-12

oftwareRequir

ements

Requirements

Management

Validation

Specification

34

SEQA-Unit2

A-


35/45

A

16-Dec-12

reRequirements

, ,

35

SEQA-Unit2A-So

ftwa

Specificationcan be any one (or more) of the following:A written document

A set of modelsA formal mathematicalA collection of user scenarios (use-cases)A prototype


36/45


37/45

C

C

C

reRequirements

16-Dec-12

37

SEQA-Unit2A-So

ftwa


38/45

Inception

Elicitation

Elaboration16-Dec-12

are

ents

Requirements

Management

Validation

Specification

38

SEQA-Unit2A-Soft

Requ

irem


39/45

D ,

, ,

,

16-Dec-12

reRequirements

,

A F

, , ,

39

SEQA-Unit2A-So

ftwa


40/45

/?

? , ?

?

?

16-Dec-12

reRequirements

D ? , (, ) ?

D ?

?

, ?

D , ? 40

SEQA-Unit2A-So

ftwa


41/45

Inception

Elicitation

Elaboration

16-Dec

-12

areRequirements

Requirements

Management

Validation

Specification

41

SEQA-Unit2A-S

oft


42/45

D , , ,

E

16-Dec-12

reRequirements

, , ,,

SEQA-Unit2A-So

ftwa

42


43/45

Inception

Elicitation

16-Dec

-12

ftwareRequirements

Requirements

Management

Validation

Negotiation

Specification SEQA-Unit2A

-So

43

2 2


44/45

2 2

? ?

?

?

F D (FD)?

D . of

twareRequirements

16-D

ec-12

?

.

44

SEQA-Unit2

A-

2 2


45/45

2 2

D . (6) ? (6)

D . (12)

C ? (6)

reRequiremen

ts

16-D

ec-12

45

SEQA-Unit2A-So

ftwa

seqa-unit2a

Documents