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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