ch 6 Flashcards
what is the prosecess model describe
business process the activities that people do
the process model are developed for…………….or……….
as is system or to be system
give example of processing model techniques
data flow diagram
we can do the data flow diagram for computerised process or not true or false
true
what is the definition of a data flow diagram
is technique that diagrams the business process and the data that pass among them
who is external entity
which is recatangle that represents individuals
what is the name of open-ended rectangle
is called data store
the destination of output flows out to
external entity and data storage
what are the elements of the data flow diagram,
processes
data flow
data stores
and external entities
every processes has
number name describtion at least one output at least one input
every date flow has
a name
a description
connection to a process
every data sore has
a number name describtion at least one output at least one input
Every external entity has
name
description
what is process
is an activity or a function that is performed for specific business reasons
what is data flow and give me another name
a data is a single piece of data
data element data flow is the glow that holds the process together
every process at least one output data flow and at least one input data flow
what is the defination of data store
is a collection of data that is stored in some way
what is the definition of an external entity
an external entity is a person organization unit or system is external to the system
the context diagram
show the overall business process as just one process and show the data flow to and from external entities
level 0 diagram
show all the processes at the first level of numbering the purpose is to show all the major high-level process of the system and how they are interlated
the context diagram hides some of the system complexity in order to make it easier to the reader to read and understand
true or false
true
process of 2.1,2.2and 2.3 are the childeren of process 2
true or false
true
level 0 dfd has no decimal points level 1 dfd has one decimal points level 2 dfd has two decimal points and so on true or false
true
what is strctured english
use short sentances that describe that a process perform s
what is decision trees
display decision logic (if statment )as set of nodes (questions )and branches (answers )
