QUIZ DFD

FLOW CHART DATA

Referred as also Data of Flow Diagram ( DFD). DFD is often used to depict an system which there have or new system to be developed logically without considering physical environment of where the data of mengalir(mis: telephonic, letter and other) or physical environment of where the data of disimpan(mis: card file, microfiche, hardisk, tape, floppy disk, and other)DFD represent the appliance used at methodologies of development system which structured(structured analysis and desain). DFD represent the appliance which enough popular this time, because can depict the data current in system with the structure and clear. DFD also represent the dukumentasi from good system

DIAGRAM KONTEKS

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)

ZERO DIAGRAM

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

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

Number Level at DFD

Name Level	Name Diagram	Number Process
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 process and maximal 9, if more hence must be done composition.

SPECIFICATION PROCESS

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) Every process 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

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

SYMBOL USED BY DFD

External entitity or boundary ;

Data flow ;

Process ;

Data store ;

EXTERNAL ENTITY

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

Symbol with the notation box

External union can be given to by identify with lower case in left back part for as follows:

External 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

External union (External entity) representing union (entity) in external environment of system which can in the form of people, organizational or other system residing in external environment of nya to give the input or accept the output from system.

This External union most is one of the in the this following:

An office, departmental or division in company of but outside system which is being developed

People or a group of people in organization of but outside system which is being developed

An organization or one who is beyond organization of like for example customer, supplayer

Other System Information outside system which edang developed

Original source from an transaction

Receiver of end of an report yielded by system

DATA CURRENT

Representing place emit a stream of it information

Depicted with the connective straight line of component 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 and name gift have to mirror 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 at data stream

As possible name of data stream writed complete

DATA CURRENT(3)

Other Dissimilar rule:

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

Data Flow which step into or go out from data storage needn't be called by if:

Simple Data stream and is easy to comprehended the

Data stream depict 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 link with the data storage have to passing process

PROCESS

Process represent what done by system

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

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

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

Process often is also referred as by bubble

PROCESS (2)

Guidance of name Gift process the:

Name process consisted of by the vb. 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 the number. Number sequence as possible follow the stream or sequence process, but that way meaningless number sequence absolutely represent the sequence process chronologically

STORAGE DATA

Data Storage represent the existing data repository in system which is in the form of as follows:

a. An file or database in system computer

b. An archives or manual note

c. An box of data place in somebody desk

d. An table of manual reference

e. An agenda or book

Symbol with the couple of parallel line or 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

In depiction of data deposit in DFD require to be paid attention to by a several things that is:

1. Only just process which deal with data deposit, because using or data fox in data deposit is an process

2. Data current going to data deposit from an process menunjukan process to update to on file data in data deposit. Update to can be in the form of the process

a. Adding or keeping new record or new document into data deposit

b. Vanishing record or take the document from data deposit

c. Fox assess data in an record or in an document of exist in sinmpanan data

3. Data current coming from data deposit to an process indicate that the the process use the data of exist in data deposit

4. To an process doing the two that is use and update the data deposit

SIMBOL OF DFD

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 among 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 (2)

Data dictionary load the followings:

Name of data Current: have to be noted by reader to needing furthermore clarification about an data current can look for it easily.

Other name: other name or name ofis differ 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

BALANCE 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 at level / level of under his

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 an 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 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 at every level have to is of equal if its object is of equal

INTERDICT IN DFD

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

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

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

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

REFERENCE

HM, Jogiyanto. Analisis & Desain Sistem Informasi. Yogyakarta: ANDI,2007.