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The OOD Process

The OOD Process. Design as a Logical Continuation of Analysis. Object-Oriented Design “Steps” of the Process?. OOA Model. OOD. Process. OOD Model. OOA. The Levels of the OOD Process - High-Level Design (1). extend the OOA Model [Coad/Yourdon] think in terms of OO model components

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The OOD Process

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  1. The OOD Process Design as a Logical Continuation of Analysis

  2. Object-Oriented Design“Steps” of the Process? OOA Model OOD Process OOD Model OOA

  3. The Levels of the OOD Process - High-Level Design (1) • extend the OOA Model [Coad/Yourdon] • think in terms of OO model components • OOA results are the basic component • problem domain component • include other components in the model • include human interface (HIC) • task management (TMC) • data management (DMC) ==> acknowledge that we develop a computer-based system around/with the analysis results

  4. The Levels of the OOD Process - High-Level Design (2) • structure your approach • decide on a general system architecture • organize the objects into a well specified system structures • organize and extend scenarios according to generally applicable patterns • reuse existing patterns • generic templates • generic architectures and frameworks

  5. The Levels of the OOD Process - Detailed Design • refine and • map the OOA Model to the infrastructure • detailed algorithms and datastructures • implementation of OO structures • implementation of states and transitions • optimization • maximize reuse • exception handling • etc.

  6. The OO Co-DesignProcessMatrix of Domain Components and Levels extend HIC TMC PDC DMC high-level Design Miniworld refine & map detailed Design

  7. Object Oriented Design means to navigate the domain/level matrix with the purpose to develop all model components on both levels in a meaningful sequence.

  8. OOD Deliverables - I • extended Static Objectmodel • Coad & Yourdon: • Problem Domain Component (PDC) • Human Interaction Component (HIC) • Task Management Component (TMC) • Data Management Component (DMC) • on the level of high-level design • basically “another analysis step” • on the level of detailed design • connect to existing class hierarchy, ...

  9. OOD Deliverables - II • completed & extended Scenarios • extend old scenarios accross domains • reflect the chosen architecture’s dynamics • build links between domain components • add new scenarios to accomodate internal organisation • e.g. data backup, rollback, load/save • on the level of high-level design • extended and new scenario diagrams (& dictionary) • on the level of detailed design • complete all details in dictionary • diagrams only if necessary (optimization, ...)

  10. Scenarios extend HIC TMC PDC DMC high-level Design refine & map detailed Design

  11. OOD Deliverables - III • Object Dictionary • document & specify the added domain components • very much like during analysis: objects, structures, ... ==> for high-level design • map and refine existing specifications • translate structures, STDs, ... • map to existing patterns and objects • document optimizations ==> for detailed design

  12. As in OOA it holds for OOD: Static Model and Scenarios are documented as graphical Views of the more complete Object Dictionary.

  13. Scenarios Dictionary Static Model The complete OOAD SpecificationThe “schoolbook scenario” HIC TMC PDC DMC high-level Design Miniworld Scenarios detailed Design Dictionary Static Model

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