Chapter 7 Structuring System Process Requirements Modern Systems Analysis and Design Seventh Edition Jeffrey A. Hoffer Joey F. George Joseph S. Valacich Chapter 7 Structuring System Process Requirements

Systems Analysis & Design I. Foundations 1. SD Environment 2. Origins of Software 3. Manage IS Project II. Planning 4. Identify & Select SD Projects 5. Initiate & Plan SD Projects III. Analysis 6. Determine Systems Req’s 7. Structure Systems Process Req’s 8. Structure Systems Data Req’s IV. Design 9. Design DB 10. Design Forms & Reports 11. Design Interfaces & Dialogues 12. Design Dist & Internet Systems V. Implementation & Maintenance 13. System Implementation 14. Maintaining IS

Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall Learning Objectives Understand the logical modeling of processes by studying examples of data flow diagrams (DFDs). Draw data flow diagrams following specific rules and guidelines that lead to accurate and well-structured process models. Decompose data flow diagrams into lower-level diagrams. Balance higher-level and lower-level data flow diagrams. Use data flow diagrams as a tool to support the analysis of IS. Discuss process modeling for EC applications. Use decision tables to represent the logic of choice in conditional statements. Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall

Key Terms Action stubs Balancing Condition stubs Context diagram Data flow diagram (DFD) Data store Decision table DFD completeness DFD consistency Functional decomposition Gap analysis Indifferent condition Level-0 diagram Level-n diagram Primitive DFD Process Rules Source / sink

Project, Inc. Hiring System Problems and Exercises #9 p. 214 DFD Exercise Project, Inc. Hiring System Problems and Exercises #9 p. 214 Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall

Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall Narratives Project, Inc., is an engineering firm with approximately 500 engineers of different types. The company keeps records on all employees, their skills, projects assigned, and departments worked in. New employees are hired by the personnel manager based on data in an application form and evaluations collected from other managers who interview the job candidates. Prospective employees may apply at any time. Engineering mangers notify the personnel manager when a job opens and list the characteristics necessary to be eligible for the job. Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall

Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall Narratives The personnel manager compares the qualifications of the available pool of applicants with the characteristics of an open job and then schedules interviews between the manager in charge of the open position and the three best candidates from the pool. After receiving evaluations on each interview from the manager, the personnel manager makes the hiring decision based upon the evaluations and applications of the candidates and the characteristics of the job and then notifies the interviewees and the manager about the decision. Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall

Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall Narratives Application of rejected applicants are retained for one year, after which time the application is purged. When hired, a new engineer completes a nondisclosure agreement, which is filed with other information about the employee. Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall

Context Diagram What is this system about? Who (what) is the external entities – sources and sinks? What data flows between the entities and the system?

Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall Problems and Exercises Chapter 7 #9 on p. 214 TEXT SOLUTION (IRM) Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall

Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall