Week 5: Usecases

Question 1

What SDLC Core process is usescase created in

Answer 1

3: investigating sys requirements

Question 2

what is a use case

Answer 2

an activity that the sys performs in response to a request by a user

Question 3

what type of requirements do use cases define

Answer 3

functional

Question 4

what is it called when analysist decompose the sys into a set of use cases

Answer 4

functional decomposition

Question 5

what are 2 techniques for identifying use cases

Answer 5

user goal technique

event decomposition technqiue

Question 6

how are usecases named

Answer 6

verb noun

Question 7

in general, how are usecases made with the user goal technique

Answer 7

identify all potential categories of users of the sys

interview and ask them to describe the tasks the comp can help them with

probe further to refine the tasks into specific user goals

Question 8

in general, how are usecases made with the event decomp

Answer 8

identify the events that occur to which the sys must respond

for each event, name a usecase (verb-noun) that describes what the sys does when the event occurs

Question 9

what are characterisitcs of an event

Answer 9

it occurs at a specific time and place, can be described, and should be remembeed by the sys

Question 10

what are 3 types of events

Answer 10

external event

temporal event

state event(internal event)

Question 11

what is an external event

Answer 11

an event that occurs outside the sys usually initated by an external agent or actor

Question 12

what is a temporal event

Answer 12

an event that occurs as a result of reaching a point in time

Question 13

what is a state event(internal event)

Answer 13

an event that occurs when something happens inside the sys that triggers the need for procesing

Question 14

what are benefits of the event decomp technique

Answer 14

events are broader than user goal, capture temporal and state events

Question 15

what is an EBP

Answer 15

elementary business process

A fundamental business provess performed by one person in one pleace in response to a business event

Question 16

what is a use case diagram

Answer 16

a UML model used to show use cases and their relationship to actors

Question 17

what is an actor in a UML

Answer 17

the end user

Question 18

are users ever inside the automation boundary of the sys

Answer 18

no, but they may be part of the manual portion of the sys

Question 19

what is the automation boundary

Answer 19

the boundary between the computerized portion of the application and the users who operate the applcation

Question 20

what is the sys boundary

Answer 20

the seperation between the sysm and its enviorment which I/O must cross

Question 21

in use case diagrams, how is an actor depicted

Answer 21

a stick fig

Question 22

in use case diagrams, what do lines from actors to usecase show

Answer 22

show which actors participate in use cases

Question 23

in use case diagrams, what is this black box

Answer 23

the automation boundary

Question 24

how many use case diagrams are drawn

Answer 24

drawn for each subsystem

drawn for each actor

Question 25

what is an actor

Answer 25

Question 26

what do associations between an actor and a use case signify

Answer 26

Question 27

what does it mean when more than one actor points to one use case

Answer 27

the use case is associated with more than one role

Question 28

can the sys clock be the primary actor of a usecase

Answer 28

Question 29

Are usecases the "what" of the system or the "how" of the sys

Answer 29

what achieves business goal, technology neutral

Question 30

must a usecase leave the sys in a stable state

Answer 30

yes

Question 31

what are 3 relationships between use cases

Answer 31

include extend generalization

Question 32

what is the include relationship

Answer 32

where one usecase is stereotypicly included within the other use case

Question 33

which way does the arrow point in an include relationship[

Answer 33

arrow points to subroutine

Question 34

should the dotted line between usecase with an include relationship indicate data or a flow

Answer 34

no

Question 35

what does a usecase extend relationship do

Answer 35

extends a use case by adding new behaviors

Question 36

can you have chains of "extends"

Answer 36

yes

Question 37

what is generalization between use cases

Answer 37

child use case inherits props and behavior of parent use cases and may ovverride the behavior of parent

Question 38

what could all these be generallized to

Answer 38

search for books

Question 39

what does a brief usecase description do

Answer 39

gives enough detail for very simple use cases

Question 40

what is a fully developed use case description

Answer 40

Question 41

what do fully developed use case descriptions include

Answer 41

use case name(verb noun) scenario(if needed) triggering event breif description actors related usecases stakeholders pre/post conditions flow of activities except concdtions

Question 42

is "user" or "admin" good actor names

Answer 42

no, too abstract

Question 43

3 magic questions when writing use cases

Answer 43

Question 44

what perspective do you write use cases from and in what tense

Answer 44

the users, present

Question 45

what does CRUD stand for

Answer 45

create read/report update delete used in DB context

Question 46

how is CRUD useful with usecases

Answer 46

look at each type of data and verify that usecases have been identified that create read/report update delete/or archive the data

Question 47

what happens when a usecase has only one pathway

Answer 47

the granularity of the usecase is much to fine

Question 48

what does functional entitlement mean

Answer 48

there is a clear mission defined for the usecase

Question 49

what does each step consist of in a use case

Answer 49

involves an event and a response: the users action and the systems reaction or vice versa

Question 50

what 2 things can a use case be triggered by

Answer 50

a sys initiated event to which the user repsonds a user initiated event that the sys has to respond to