System Analysis and Design: System Design and it’s Classification-System Pyramid 3 level or 4 level Architecture of System
System Analysis and Design: System Design and it’s Classification-System Pyramid 3 level or 4 level Architecture of System.
Sure! Here’s a clear and simple explanation of System Design and its Classification, along with the System Pyramid Architecture used in System Analysis and Design:
Contents [hide]
Subject: System Analysis and Design
Topic: System Design & Its Classification
Focus: System Pyramid – 3-Level or 4-Level Architecture
What is System Design?
System Design is the process of defining the architecture, components, modules, interfaces, and data for a system to satisfy specific requirements.
It comes after system analysis and aims to convert business requirements into technical solutions.
Types (Classification) of System Design
System design is broadly classified into:
1. Logical Design
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Focus: What the system must do
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Includes:
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Inputs & outputs
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Data flow diagrams (DFDs)
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Logical relationships
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2. Physical Design
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Focus: How the system will perform tasks
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Includes:
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Hardware/software specification
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Database design
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Screen layouts & reports
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System Pyramid Architecture (3 or 4 Levels)
A System Pyramid shows the hierarchy of information systems in an organization.
Option A: 3-Level Architecture
| Level | Type of System | User Level | Purpose |
|---|---|---|---|
| Top | Strategic Level (EIS) | Executives (CEO) | Long-term planning & forecasting |
| Middle | Tactical Level (MIS/DSS) | Managers | Medium-term decisions & analysis |
| Bottom | Operational Level (TPS) | Staff/Workers | Day-to-day transaction processing |
Option B: 4-Level Architecture (more detailed)
| Level | System Type | User | Example |
|---|---|---|---|
| 1. Strategic | Executive Information System (EIS) | Top Executives | Annual reports, Forecasting |
| 2. Tactical | Decision Support System (DSS) / MIS | Middle Managers | Sales trends, Budget planning |
| 3. Knowledge | Knowledge Work System (KWS) / Office Automation | Knowledge workers | CAD, Word Processing |
| 4. Operational | Transaction Processing System (TPS) | Front-line staff | Billing, Payroll, Order Entry |
Visual Summary: System Pyramid (4-Level)
Relationship Between the Levels:
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Lower-level systems (TPS) feed data upwards to MIS, DSS, and EIS.
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Upper-level systems help in making informed decisions based on data processed at lower levels.
Summary Points
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System Design = Logical + Physical Design
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Pyramid Architecture helps organize systems by user level
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3-Level = TPS, MIS/DSS, EIS
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4-Level = TPS, KWS/OAS, MIS/DSS, EIS
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A diagram of the system pyramid?
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