aravali college of engineering and management, faridabad

Aravali College of Engineering and Management,

Faridabad

Department of Computer Science & Engineering(July – Dec 2020)

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Logical, Physical

design And IPO/HIPO

charts

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Introduction• Starts with the planning of a new system• Designing is not a single phase of SDLC• Design is always happening• You collect info, then Design, collect more info

from feedback and Design again.

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Relationship between logical and Physical Design

– The logical design defines the functions and features of the system and the relationships among its components

– Logical design done during the system analysis phase

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The Relationship between Logical and Physical Design

– The physical design of an information system is a plan for the actual implementation of the system

– The physical design is built on the system’s logical design and describes a specific implementation

– System design usually begins after completing system analysis phase

– Some overlap is possible, you might return to fact-finding if you discover that you overlooked an important issue, if user have significant new needs, or if legal or governmental requirements change

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• The systems analyst must understand the logical design of the system before beginning the physical design of any one component

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IPO/ HIPO Charts• Developed by IBM• To understand structure and

functions of systems• To provide easily understandable

description of various parts of system

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Purpose:• to define procedures and operations in a

hierarchical manner, correlating input, processing, and output steps with the integrated whole expressed in the hierarchy diagram.

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HIPO• A HIPO package consists of a hierarchy chart and IPO

overview diagram and IPO detail diagram:– Hierarchy Chart– IPO Chart– IPO detailed chart

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HIPO Diagram

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IPO overview diagram

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IPO Detailed Diagram

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Dilbert’s Boss: Lazy system Analyst

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Aravali College of Engineering And ManagementJasana, Tigoan Road, Neharpar, Faridabad, Delhi NCR

Toll Free Number : 91- 8527538785Website : www.acem.edu.in