System Analysis And Design

Discussed by: Zernie Pugao

System Run Chart

The pictorial representation of the logical inter-relationship between

the data and the process. It can be define as pictorial representation of

logical inter-relationship bet. the procedures, input, output and their

data stores.

Standard Symbols and notation

Process

It Indicates the functions being performed

Standard Symbols and notation

Storage

A storage media, which can be temporary or permanent

Employee master

Disk

Standard Symbols and notation

Input/OutputDevice

It represent the non-processing parts of the system.

Validate Report

Printer

• Describes in outline of the events in a system

• Shows departments, functions events and responsibility of each.

• Symbols are connected by line arrows.•Plain language annotation.

System Flow Chart

Data Flow Diagram

The ff questions are course analysis.

• What are the process that make up a system?• What data is used in each of the processes?

• What and how is the data stored? • What data entered and leaves the system?

DFD Notation

Data Flow

DFD Notation

Process

DFD Notation

Source or Destination

DFD Notation

Data Source

Data Dictionary (DD)

The central depository of all the elements that are used in a system.

Data DictionaryDATA NAMES The data of the data item

DATA DESCRIPTION Brief description of data item

ALIASES Is the data name referred by another name

DATA TYPE The data type of the data item

LENGTH The size of the data item

DATA VALUES Permissible values that can be stored

USED IN Which process(es) uses it

Stock No.DATA NAMES Stock No.

DATA DESCRIPTION A unique no. that identify each stock item

ALIASES Item number

DATA TYPE Character

LENGTH 5

DATA VALUES 10000-99999

USED IN Data-entry, Update-master