BIS 310 Week 5 BIS 310 Structured Analysis

BIS 310: Week 5 BIS 310: Structured Analysis and Design Procurement Phase and Systems Design - Procurement Phase - Software Design

BIS 310: Week 5 What is Systems Design ? • Systems design is the specification of a detailed computer-based solution. It is also called physical design. • The purpose of the systems design phase is to create a blueprint that will satisfy all requirements for the system.

BIS 310: Week 5 Hardware and Software Acquisition (Procurement Phase) • Research technical criteria (if necessary) • Solicit proposals and/or quotes from vendors (a letter) • Evaluate vendor proposals and a congratulation letter

BIS 310: Week 5 Design and Integration Phase • • • Analyze and Distribute Processes Analyze and Distribute Data Design Files and Database(s) Design Computer Outputs and Inputs Design User Interfaces Present and Review Design

BIS 310: Week 5 Strategies For Software Design • • • Modern Structured Design Prototyping JAD RAD Object-Oriented Design (OOD)

BIS 310: Week 5 Modern Structured Design • Structured design seeks to factor a program into the top-down hierarchy of modules. • The software model derived from structured design is called a structure chart.

BIS 310: Week 5 Representing Design Specifications • Structure Charts – Shows how an information system is organized in hierarchical modules – Shows how parts of a system are related to one another – Shows breakdown of a system into programs and internal structures of programs written in third and fourth generation languages

BIS 310: Week 5

BIS 310: Week 5 Highly Cohesive and Loosely Coupled • Modules should be highly cohesive; that is, each module should accomplish one and only one function. • Modules should be loosely coupled; in other words, modules should be minimally dependent on one another.