DFD QUIZ

DATA FLOW DIAGRAM

FLOW CHART DATA

- Referred as also Data of Flow Diagram ( DFD)

- Depicting system division into smaller module

- Facilitating wearer which less comprehend the computer area to understand the system to be done

CONTEXT DIAGRAM

- Consist of by one process and depict the scope from an system

- Representing highest level from DFD depicting entire/all input to system and outpur from system

- System limited by boundary ( depicted by dash line)

- There may not be any depository ( storage)

DIAGRAM of ZERO

Depicting process from DFD

Opening on to by totally hit the system handled, showing existing especial process or function, stream of data and eskternal entity

At this level is enabled by the existence of data storage

For the process of which is not detailed again at level hereinafter is hence enhanced by a symbol ‘*’ or ‘ P’ by the end of number process the

balance of Input and output ( balancing) of between diagram 0 with the context diagram have to be looked after

DIAGRAM DETAILED THE

Representing Diagram elaborating process of what there is in diagram of zero or level of above his

Nama Level	Nama Diagram	Nomor Proses
0	Context
1	Diagram 0	1.0, 2.0, 3.0, ...
2	Diagram 1.0	1.1, 1.2, 1.3, ...
3	Diagram 1.1	1.1.1, 1.1.2, ...

In one level shall not there are more than 7 fruit process and maximal 9, if/when more hence must be done dekomposisi.

SPECIFICATION OF PROCESS

Each Every process of at DFD have to own the specification of process

At top level method used to depict the process earn by using descriptive sentence

At more level detailed that is at process most under ( functional primitive) requiring more specification is structure

Specification of process will become the guidance for programmer in making program ( coding)

Method used in specification of process: breakdown of process in the form of story, decision table, decision tree

EXTERNAL UNION

Something that of beyond system, but he give the data into system or give the data from system

Symbol : notation box

External of entity do not the inclusive of the part of system

Naming:

Terminal name in the form of noun

Terminal may not own the same name except its object (it) is true is of equal

DATA CURRENT

Representing place emit a stream of it information

Depicted with the connective straight line ofcomponent from system

Data current shown with the direction bow and mark with lines called by for data current emiting a stream of

Data current emit a stream of among process, data storage and show the data current from data which is in the form of input for the system of.

DATA CURRENT 2

guidance of name Gift:

name of data Stream consisted of by some word stream attributed to by a continued line

There may not be any data stream which its name is of equal, name gift have to mirror the its contents

Data stream consisted of by some element can be expressed by grup is element

Avoid the word use ‘ data’ and ‘ information’ to give the name of at data stream

name of data Stream writed complete.

DATA CURRENT 3

Rule of is other dissimilar:

name of data Stream which come into a[n process may not is equal to secretory data stream name from the process

incoming data Flow, go out from data storage needn't be called by if:

- simple Data stream, is easy to comprehended,

- Data stream depicting entire/all data item

There may not be any data stream from terminal to data storage or on the contrary because terminal of non part of system, terminal relation with the data storage have to passing process

PROCESS

Process represent what done by system

Process earn the mengolah of data or incoming data stream become the data stream go out the

Process function the mentransformasikan one or some input data become one or some output data as according to specification wanted

Each Every process own one or some input and also yield one or some output

Process is often referred as by bubble.

PROCESS 2

guidance of name Gift process the:

Name process consisted of by the verb and noun mirroring the process function

Don't use the word process as part of name of an bubble

There may not be any some process owning same name

Process have to be given by number.

DATA DEPOSIT

Data Storage represent the existing data repository in system

Symbol : a couple of parallel line / two line wrongly one side from other side opened

Process can take the data from or give the data to database

guidance of name Gift:

- Name have to mirror the data storage,

- If its name more than one word hence have to be said the word to by joint

DATA DICTIONARY

Functioning assist the system perpetrator to interpret the application in detail and organizational all data element used by a system precisely so that wearer and system analyst have the same congeniality base about input, output, depository and process

At phase analyse the, data dictionary used as by communication means of between system analyst with the wearer

At phase of system scheme, data dictionary used to design the input, report and database

Data current of at DAD have the character of global, boldness more detailed visible at data dictionary

Data dictionary load the followings:

- name of data Current: have to be noted by reader to needing furthermore clarification about a[n data current can look for it easily

- name of is differend from data can be writed by if (there are) any

- Data form: used to group the data dictionary into its use time of system scheme

- Data current: showing where from data emit a stream of and where data go to the

- Clarification: giving clarification of about meaning from data current

BALANCING of IN DFD

Data Stream which come into and go out from one process have to is equal to data stream which come into and go out from detail of process of at level / level of under.

Name of data Stream which come into and go out from one process have to is equal to incoming data stream name into and go out from detail of the process

Sum up and external name entitas from a[n process have to is equal to amount and external name entitas from detail of the process

Things which must be gave attention to by DFD owning more than one level:

- Have to there are balance of input and output of between one next level and level

- Balance of between level 0 and level 1 seen at input / output from data stream to or from terminal of at level 0, while balance of between level 1 and level 2 seen at input / output from data stream to / from pertinent process

- name of data Stream, data of storage and terminal of at every level have to is of equal if its object is of equal

INTERDICT of IN DFD

Data Current may not from direct external entitas go to the other external entitas without through an process

Data current may not from direct data deposit go to the external entitas without through an process

Data current may not from direct data deposit go to the other data deposit without through an process

Data current from one direct process go to the other process without through an data deposit better / can is possible avoided