In these case studies, iteration - 1 of the elaboration phase emphasizes a range of fundamental and common OOA / D skills used in building object systems. Many other skills and £teps - such as database design, usability engineering, and UI design - are of course needed to build software, but they are out of scope in this introduction focusing on OOA / D and applying the UML.
The requirements for the first iteration of the NextGen POS application follow:
The design and implementation of the supporting UI, database, and so forth, would also be done, but is not covered in any detail.
The requirements for the first iteration of the Monopoly application follow:
Subsequent iterations will grow on these foundations.
In Iterative Development We Don't Implement All the Requirements at Once
Note that these requirements for iteration - 1 are subsets of the complete requirements or use cases. For example, the NextGen POS iteration - 1 requirements are a simplified version of the complete Process Sale use case; they describe one simple cash - only scenario.
Note also that we haven't done all the requirements analysis for the NextGen POS system, we've only analyzed the process Sale use case in detail; many others are not yet analyzed.
This is a key understanding in iterative lifecycle methods (such as the UP, XP, Scrum, and so forth): We start production - quality programming and testing for a subset of the requirements, and we start that development before all the requirements analysis is complete - in contrast to a waterfall process.
Incremental Development for the Same Use Case Across Iterations
Notice that not all requirements in the Process Sale use case are being implemented in iteration - 1. It is common to work on varying scenarios of the same use case over several iterations and gradually extend the system to ultimately handle all the functionality required. On the other hand, short, simple use cases may be completed within one iteration.
Use case implementation may be spread across iterations
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Object-oriented Analysis And Design
Iterative, Evolutionary, And Agile
Inception Is Not The Requirements Phase
Iteration 1 Basics
System 'sequence Diagrams
Requirements To Design-iteratively
Logical Architecture And Uml Package Diagrams
On To Object Design
Uml Interaction Diagrams
Uml Class Diagrams
Grasp: Designing Objects With Responsibilities
Object Design Examples With Grasp
Designing For Visibility
Mapping Designs To Code
Test - Driven Development And Refactoring
Uml Tools And Uml As Blueprint
Iteration 2 - More Patterns
Quick Analysis Update
Grasp: More Objects With Responsibilities
Applying Gof Design Patterns
Iteration 3 Intermediate Topics
Uml Activity Diagrams And Modeling
Uml State Machine Diagrams And Modeling
Relating Use Cases
Domain Model Refinement
More Ssds And Contracts
Logical Architecture Refinement
More Object Design With Gof Patterns
Designing A Persistence Framework With Patterns
Uml Deployment And Component Diagrams
Documenting Architecture: Uml & The N+1 View Model
More On Iterative Development And Agile Project Management
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