Systems Analysis and Design in a Changing World, Tuesday, Jan 30

2 Today’s Schedule System Requirements Test #1, Thursday, February 8 Continue Reading Chapter 4, page 120 System Stakeholders

3 Learning Objectives Describe the activities of the systems analysis life cycle phase Explain the effect of business process reengineering on activities of the analysis phase Describe the difference between functional and nonfunctional system requirements

4 Overview Analysis phase of SDLC skills needed – Fact finding for investigation of system requirements – Analyst should learn details of business processes and daily operations – Analyst should become as knowledgeable as business domain users to build credibility – Analyst brings fresh perspective to problem – Modeling of business processes based on system requirements

5 The Analysis Phase in More Detail Gather information Define system requirements – Functional and nonfunctional Prioritize requirements Prototype for feasibility and discovery Generate and evaluate alternatives Review recommendations with management

6 The Activities of the Analysis Phase

7 Activities of the Analysis Phase and Their Key Questions (Figure 4-2)

8 Business Process Reengineering and Analysis Fundamental strategic approach to organizing company Streamlines internal processes to be as efficient and effective as possible Questions basic assumptions for doing business and seeks to find a better way Uses IT as BPR enabler Systems analyst may discover opportunities for process improvement Any project may include components of BPR

9 Zachman Framework for Enterprise Architecture (Figure 4-3)

10 System Requirements New system capabilities and constraints Functional requirements – Activities system must perform (use cases) – Based on procedures and business functions – Documented in analysis models Nonfunctional requirements – Technical environment or performance objectives – Usability, reliability, and security requirements

11 For Thursday, February 1 Install Visual Paradigm, Community Edition Continue Reading Chapter 4, page 120 System Requirements