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Software Engineering – Analysis Modeling

Software Engineering – Analysis Modeling. INTRODUCTION. Software Engineering – Analysis Modeling. DOMAIN ANALYSIS Sources of domain knowledge Technical literature Existing application Customer surveys Expert advice Current/future requirements. Software Engineering – Analysis Modeling.

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Software Engineering – Analysis Modeling

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  1. Software Engineering – Analysis Modeling INTRODUCTION

  2. Software Engineering – Analysis Modeling DOMAIN ANALYSIS Sources of domain knowledge Technical literature Existing application Customer surveys Expert advice Current/future requirements

  3. Software Engineering – Analysis Modeling ANALYSIS MODELING APPROACHES ELEMENTS OF THE ANALYSIS

  4. Software Engineering – Analysis Modeling DATA MODELING CONCEPTS Analysis modeling often begins with data modeling. A data object is a representation of almost any composite information (different properties or attributes) Data objects encapsulates data only, there is no reference within a data object or the operations that act on the data. Data objects can then be represented as tables:

  5. Software Engineering – Analysis Modeling DATA MODELING CONCEPTS Data attributes define properties of a data object. RELATIONSHIPS Data objects connect to one another in different ways. Arrows can provide directionality to a relationship and therefore reduce ambiguity

  6. Software Engineering – Analysis Modeling RELATIONSHIPS CARDINALITY We must understand the number of occurrences an object has related to another object. Cardinality is the specification of the number of occurrences of one object that can be related to the number of occurrences of another object. 1 : 1 relationship – one object can relate to only another object. 1 : N relationship – one object can relate to many objects. M : N relationship – a number of occurrences of an object can relate to many objects

  7. Software Engineering – Analysis Modeling SCENARIO BASED-MODELING Write Use-Cases Develop an Activity Diagram

  8. Similar to a flowchart: • Round rectangles imply specific system functions • Arrows represent flow through the system • Diamonds depict a branching decision Software Engineering – Analysis Modeling SCENARIO BASED-MODELING

  9. Swim Lane Diagram Represents flow of activities indicating which actor has responsibility for the action. Responsibilities are represented as parallel segments that divide the diamond vertically, like the lanes in a swimming pool. Software Engineering – Analysis Modeling SCENARIO BASED-MODELING

  10. Software Engineering – Analysis Modeling FLOW-ORIENTED MODELING Data Flow Diagrams show the input-process-output view of a system. DFD’s are not part of UML, but a complement to UML. There is a natural tendency to show too much detail too soon. Start at a high level and work your way down one process at a time.

  11. Software Engineering – Analysis Modeling FLOW-ORIENTED MODELING DFD for the SafeHome Security function

  12. Software Engineering – Analysis Modeling FLOW-ORIENTED MODELING Level 1 DFD for SafeHome Security Function

  13. Software Engineering – Analysis Modeling FLOW-ORIENTED MODELING Level 2 DFD that refines the monitor sensors process

  14. Software Engineering – Analysis Modeling FLOW-ORIENTED MODELING

  15. Software Engineering – Analysis Modeling CLASS-BASED MODELING Class diagram for the system class

  16. Software Engineering – Analysis Modeling CLASS-BASED MODELING Class diagram for FloorPlan

  17. Software Engineering – Analysis Modeling CLASS-BASED MODELING A composite aggregate class

  18. Software Engineering – Analysis Modeling CLASS-BASED MODELING Multiplicity

  19. Software Engineering – Analysis Modeling CLASS-BASED MODELING Dependencies

  20. Software Engineering – Analysis Modeling CLASS-BASED MODELING An important part of analysis modeling is categorization. Grouping various elements of the analysis model are done with a package.

  21. Software Engineering – Analysis Modeling CLASS-BASED MODELING State diagram for the Control Panel class

  22. Software Engineering – Analysis Modeling CLASS-BASED MODELING Sequence diagram (partial) for the SafeHome security Function

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