System Analysis & Design - PART 6 - Systems Design and Modelling

Oct 25, 2026

System Analysis & Design introduces Part 6 with a focus on Systems Design and Modelling. It defines systems design as specifying or constructing technical, computer-based solutions aligned with business requirements, often through working prototypes, and explains the role of system designers as information systems technology specialists. The content outlines three methods—Modern Structured Design, Prototyping, and Object-Oriented Design—then transitions to process modelling by defining models (logical vs physical) and describing process modelling and data flow diagrams (DFD).

LanguageEnglish

CategoryTechnology

FormatPDF

Pages37

Reading Time1 h 33 min

AccessFree to download

Systems Design

Systems Design (1)

Systems Design (2)

Process Modelling

Model

Logical Model

Physical Model

Process Modelling

Data Flow Diagrams (DFD)

System Analysis & Design PART 6 – Systems Design and Modelling BY D R A B D U L LA H A L ZA H RA N I د . ﻋ ﺒ ﺪ ﷲ ﺑ ﻦ ﻋ ﺒ ﺪ ا ﻟ ﺮ ﺣ ﻤ ﻦ ا ﻟ ﺰ ھ ﺮ ا ﻧ ﻲ AA H ZA H RA N I @ U QU . E D U . SA DR ABDULLAH ALZAHRANI. AAHZAHRANI@UQU.EDU.SA 1 Systems Design and Modelling 􀀁Systems Design 􀀁 Process Modelling 􀀁 Data Flow Diagrams 􀀁Database Design Systems Design (1) Systems Design (2) DR ABDULLAH ALZAHRANI. AAHZAHRANI@UQU.EDU.SA 4 Systems Design (3) 􀀂 SYSTEM DESIGN the specification or construction of a technical, computer-based solution for the business requirements identified in a system analysis . (Note: Increasingly, the design takes the form of a working prototype.) 􀀂 DESIGNER System designers are technology specialists for Information systems 􀀂system designers are interested In information technology choices and in the design of systems that use chosen technologies. Today's system designers tend to focus on technical specialities . SysDetsemign 􀀂 METHODS: 1. Modern Structured Design 􀀃Structured design techniques help developers deal with the size and complexity of programs 􀀃A system design technique that focuses on processes and decomposes the system's processes into manageable components. DR ABDULLAH ALZAHRANI. AAHZAHRANI@UQU.EDU.SA 6 Systems Design (5) 􀀂 METHODS: 2. Prototyping 􀀃The prototyping approach is an iterative process involving a close working relationship between the designer and the users . 􀀃doesn't necessarily fulfil all design requirements. Systems Design (4) 􀀂 METHODS: 3. Object-Oriented Design 􀀃 an approach used to specify the software solution in terms of collaborating objects, their attributes, and their methods 􀀃 the newest design strategy. DR ABDULLAH ALZAHRANI. AAHZAHRANI@UQU.EDU.SA 8 Process Modelling 􀀂 MODEL 􀀂 a graphic representation of reality. 􀀂 LOGICAL MODEL 􀀂 a non-technical pictorial representation that depicts what a system is or does . Synonyms are essential model, conceptual model and business model 􀀂 PHYSICAL MODEL 􀀂 a technical pictorial representation that depicts what a system is or does and how the system is implemented. Synonyms are implementation model and technical model. 􀀂 PROCESS MODELLING 􀀂involves graphically representing the functions, or processes that capture, manipulate, store and distribute data between a system and its environment and among system components Data Flow Diagrams (DFD) 􀀂 Data flow diagrams (DFD) 􀀂 A common and traditional form of process modelling technique 􀀂Graphically illustrate movement of data between external entities and the processes and data stores within a system 􀀂 DFD’s are not as good as flowcharts to depict details of physical systems DR ABDULLAH ALZAHRANI. AAHZAHRANI@UQU.EDU.SA 10

FAQs

What does systems design mean in this document?

Systems design refers to specifying or constructing a technical, computer-based solution that satisfies business requirements, increasingly in the form of a working prototype.

What are the three design methods covered?

The document lists Modern Structured Design, Prototyping, and Object-Oriented Design as the core methods.

How does process modelling relate to data and system components?

Process modelling graphically represents functions and processes that capture, manipulate, store, and distribute data between a system, its environment, and its components.

Oct 25, 2026

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