lecture 4

Question 1

WBS

Answer 1

document where project is divided into phases, deliverables and work packages

Question 2

workflow

Answer 2

a sequence of processing steps to handle a business transaction or customer request

Question 3

activity diagram describes (3 things)

Answer 3

1) user/system activities
2) the person who does each activity
3) the sequential flow of these activities

Question 4

use case

Answer 4

an activity the system performs due to a request by user

Question 5

what do use cases define

Answer 5

functional requirements

Question 6

two techniques to identify use cases

Answer 6

1) user goal technique

2) event decomposition technique

Question 7

why is user goal technique commonly used

Answer 7

it is simple and effective

Question 8

disadvantage of user goal technique

Answer 8

it is very long to do

Question 9

how is a user goal technique done

Answer 9

1) identifying all potential users of the system e.g. customers and admin
2) interview said users and ask them to describe what they would like the system to do
3) refine the tasks into specific user goals

Question 10

left and right of a user goal technique table

Answer 10

user on the right, use cases on the left

Question 11

what are the specific steps when using a user goal technique (long af)

Answer 11

1) identify potential users
2) classify users according to their functional roles
3) further classify users according to their organizational level
4) interview users to find a list of specific goals they would like the system to perform
5) create list of preliminary uses cases and organize them by the type of user
6) look for duplicates with similar name and resolve inconsistencies
7) identify where different types of users will need to use the same use case
8) review completed list with users and stakeholders

Question 12

what is done for the event decomposition technique

Answer 12

1) identify the events that would occur which the system would respond to
2) for each event, name a use case describing what the system would do when the event happens

Question 13

advantages of event decomposition technique

Answer 13

it is comprehensive and complete

Question 14

disadvantage of event decomposition technique

Answer 14

it is challenging to choose the appropriate level of details for use cases, either too narrow or broad

Question 15

elementary business process (EBP)

Answer 15

a fundamental task in a business process that is performed by a single person in response to a business event

Question 16

advantages of elementary business process

Answer 16

adds measurable value and leaves the system and its data in a stable and consistent state

Question 17

event

Answer 17

an activity that is done in a specific time and place and can be remembered by the system

Question 18

types of event

Answer 18

external
temporal
state

Question 19

external event

Answer 19

an event that occurs outside of the system, initiated by an external somebody

Question 20

temporal event

Answer 20

an event that occurs as a result of reaching a certain point of time e.g. alarm, quiz, bill

Question 21

state event

Answer 21

an event that occurs when something happens inside of the system that triggers a certain process e.g. when theres a drop of inventory so a notification is send about reordering

Question 22

what are the specific steps when using an event decomposition technique (long af)

Answer 22

1) consider all the external events that would require a response from the system
2) for each external event, identify and name the use case
3) consider the temporal events that would require a response from the system
4) for each temporal event, identify and name the case case, and the point of time that will trigger the use case
5) consider the state events that would require a response from the system
6) for every state event, identify and name the use case which the system requires

Question 23

state events are a consequence of..

Answer 23

external events

Question 24

what does crud stand for

Answer 24

create
read/report
update
delete (archive)

Question 25

what is crud used for

Answer 25

it is a technique used to validate, refine or cross check use cases

Question 26

crud is not primarily used for..

Answer 26

identifying use cases

Question 27

use case diagram

Answer 27

a UML model which shows the use cases and their relationships with actors

Question 28

unified modeling language (UML)

Answer 28

a standard language used for diagrams and contains terminology that is used for developing information systems

Question 29

actor

Answer 29

UML name for a user that plays a role

Question 30

automation boundary

Answer 30

the separation between the computerized portion of the application and the user who handles the application

Question 31

how to draw a use case diagram UML

Answer 31

1) identify actors
2) for each category of user, identify roles played by users
3) identify what the users require the system to do to achieve goals
4) create use cases for each goal
5) structure the use cases
6) prioritize, review and validate the users

Question 32

<>

Answer 32

is used to denote a relationship between a use case and the common sequences of system-user interactions