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System design is a process of that plans a new business system and also replaces the existing system to satisfy all the basic requirements by defining its modules as well as its components.
To determine that how the computers or the systems can be used or can be operated in an efficient manner one should have the thorough understanding of :-
- Choose high-level strategy for solving problem and building solution
- Decide how to organize the system into subsystems
- Identify concurrency / tasks
- Allocate subsystems to hardware and software components
System design includes various architecture i.e.
- System architecture
- Software architecture
- Client-server architecture
- Closed architecture
- Open architecture
- Layered architecture
- Partitioned architecture
Some general concerns of system design are follows:-
- Information Hiding
- Abstract Data Types
- Identifying Concurrency
- Global Resources
System design is the branch of product development which helps to define the modules, architecture, interfaces, and data for a system to achieve some objective or satisfy specified requirements of the user. System design is integrated with various terms like systems analysis, systems architecture and systems engineering to design an system for a specific task.
To satisfy the specified requirement of system i.e component, modules, interface and data are defined by the process of System Design.The process of creating or altering the system is called System development.It includes the processes, practices, models, and methodologies used to develop them.
The aim of system design is to offer the relevent informations, data which are useful and important for system elements implementation.It supplement the System architecture.It developes, express, documents, and communicates the realization of the architecture of the system. It consist the complete set of design characteristics described in a form suitable for implementation.
It manages and provide help in operation and maintenance for system elements as design strategy for system descibe the search or commonalities.
Topics For System Design
- Role of the system designer, System design, Solution Delivery, Scope of Design, Component design, Data design, Input/output design, Security design, Impact of business rules on design, Architectural issues in design, Business
- Application, IT architectural considerations, Use of design patterns for software architecture, Impact of COTS, impact of legacy systems, Using requirements documentation as a basis for design activities,Requirements catalogue
- Functional models, use case diagram, Event-based models, state machine diagram, Domain models, analysis class diagram, Component Design , Use and notation of UML, Coupling, cohesion in Use Case Realisation
- Component design, Presentation, business and data layers, Interfaces between these layers, User Interface Components, Persistent Data Components, Security Components,Provided and Required Interfaces
- Design using class, activity, state transition models, Mapping Class operations, attributes from Use Case descriptions, Producing Sequence Diagrams from Class, Activity diagrams, Modelling user interfaces with state machine diagrams
- Data Design, Use and notation of Structured System Models, Logical Systems Modelling, Access Paths, Detailed definition of processes, Normalisation,Normalisation of selected inputs and outputs , Physical systems modelling
- De-normalising, Star Schemas, design of Fact and Dimension Tables, , SDT Syllabus, Input /Output Design , Identifying I/O Data Elements, selection of data capture, I/O technologies, Transmission, Data Quality, Data Entry
- Storage and Retrieval, Management Information Reports, Design of input and output interfaces, Dialogue Modelling and Design, Forms and Layout Design, Inter-system data exchange format design, Prototyping the user interface
- Types of Prototype, Prototyping Issues,Controls and Security, Verification and Validation of data, protected, private, packages, attributes and methods, Output controls, Physical and logical security, Risk assessment of controls and security
- Backup and recovery procedures, Disaster Planning, Systems Analysis and Design, Project Management, Requirements Determination, Human Computer Interaction, OOAD, Business Process, Functional Modeling, Business Process
- Functional Modeling, Business Process, Functional Modeling, Business Process, Functional Modeling, Data Modeling, Structural Modeling, Behavioral Modeling, Systems Maintenance, Testing