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Software Construction

Software Construction. Engr. Arta Iftikhar Engr. Kanwal Yousaf. Contents. Why model ? What is UML ? Building Blocks of the UML Diagrams. Why Model?. A model is a simplified representation of a complex reality.

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Software Construction

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  1. Software Construction Engr. Arta Iftikhar Engr. Kanwal Yousaf

  2. Contents • Why model ? • What is UML ? • Building Blocks of the UML • Diagrams

  3. Why Model? • A model is a simplified representation of a complex reality. • Complex systems and software cannot be understood without properly modeling them. • Today, software are getting complex and consequently we need to understand them through modeling. • Analyse the problem-domain • simplify reality • capture requirements • visualize the system • specify the structure and/or behaviour of the system. • Design the solution • document the solution - in terms of its structure, behavior, etc.

  4. What is UML? • UML is a “Visual Modeling Language’ that enables system builders to create blueprints that capture their vision in a standard, easy to understand way, and provide a mechanism to effectively share and communicate these visions with others. [reference: UML 24 hours]

  5. More on UML... UML is a modeling language for visualising, specifying, constructing and documenting the artifacts of software systems. Visualising- a picture is worth a thousand words; a graphical notation articulates and unambiguously communicates the overall view of the system (problem-domain).

  6. More on UML... Specifying - UML provides the means to model precisely, unambiguously and completely, the system in question. Constructing - models built with UML have a “design” dimension to it; these are language independent and can be implemented in any programming language.

  7. More on UML... Documenting - every software project involves a lot of documentation - from the inception phase to the deliverables. UML provides the notations for documenting some of these artifacts Documentation is (among others) for: • Requirements • Design • Tests

  8. Unified Modeling Language UML

  9. Building Blocks of UML • Things • Relationships • Diagrams

  10. UML Building Blocks Things Relationships Diagrams • Structural • Behavioral • Class Diagram • Activity Diagram • Use Case Diagram • Sequence Diagram • Deployment Diagram etc. • Dependency • Association • Generalization • Realization

  11. Diagrams The graphical presentation of the model. Represented as a connected graph - vertices (things) connected by arcs (relationships). UML includes nine diagrams - each capturing a different dimension of a software-system architecture. • State chart Diagram • Activity Diagram • Component Diagram • Deployment Diagram • Class Diagram • Object Diagram • Use Case Diagram • Sequence Diagram • Collaboration Diagram

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