Object-Oriented Analysis and Design LECTURE 2: INCEPTION PHASE

Objectives  Systems Development Life Cycle  The Unified Process  UP Models  Inception Phase

The Systems Development Life Cycle  SDLC: The process of planning, analyzing, designing, building, deploying, using and updating an information system  SDLC Variations  Predictive: project planned entirely in advance  Adaptive: planning leaves room for contingencies  Pure approaches to SDLA are rare  Most projects have predictive and adaptive elements

Predictive vs. Adaptive SDLC approaches

SDLC Phases and Objectives

Predictive: The Waterfall Approach

Adaptive: The Spiral Life Cycle Model

The Unified Process SDLC

Unified Process Phases and Objectives

UP Models

UP Life Cycle Model

Business Modeling  Major Activities  Understand surroundings  Create the system vision  Create business models

Requirements  Major Activities  Gather detailed information  Define functional and nonfunctional requirements  Develop user interface dialogs  Evaluate requirements with users

Design  Major activities  Design support services architecture and deployment environment  Design the software architecture  Design the use case realizations  Design the database  Design the system and user interfaces  Design the system security and controls

The Unified Process and the Inception Phase  Inception Phase has 5 objectives:  Identify the business need for the project  Establish the vision for the solution  Identify scope of the new system and the project  Develop preliminary schedules and cost estimates  Develop the business case for the project

Inception Phase Documents  Project Charter and Business Case  Stakeholder Analysis  Essential Use Case list  Risk Analysis This is not a complete list – it focuses on the documents your team should produce

Project Charter and Business Case

Project Charter and Business Case (cont.)

Stakeholder Analysis Form

Essential Use Case list

Risk Analysis

Completing the Inception Phase  Key deliverables of inception  Project charter package  Essential use case list  Project schedule  Cost/benefit analysis  Project feasibility and risk analysis

Next Three Weeks  Next Week  Labor Day – No Class  Two Weeks  Sponsor Interview  6:30 – 7:30p: Baseball League Information Manager  7:30 – 8:30p: Degree and Certificate Auditor  Three Weeks  Requirements Discipline