Logical Design Phase

Purpose of phase is to:

1. Translates Business Requirements into System Models (Data Flow Diagrams)

• Technology independent (translate words into pictures)

Tasks: First task can be broken into 2 separate functional requirements categories: Structure & Prototype

4.1a Structure Functional Requirements

4.1b Prototype Functional Requirements

4.2 Validate Functional Requirements

4.3 Define acceptance test cases

Methodologies (Agile Modelling):

• Architected Rapid Application Development
• Extreme Programming

Models:

• Logical DATA Models = Data & Info Requirements
• Logical PROCESS Models = Business Requirements
• Logical INTERFACE Models = Business & System Interface Requirements

Participants:

• System Analysts (draw models)
• System Users (validate models)
• Project Managers

Deliverables:

• Logical System Models & Specifications

Reference: SAD pg 84, 189

FAST Phases

Framework for the

Application of

Systems

Thinking (representative systems development process).

FAST Phases are more detailsed than the classic phases:

• Scope Definition
• Problem Analysis
• Requirements Analysis
• Logical Design
• Decision Analysis
• Physical Design & Integration
• Construction & Testing
• Installation & Delivery

Reference: SAD pg 71, 79