Structured Systems Analysis and Design (ICT2621) - Chapter 4 Actual Review Exam Questions With Well Elaborated Answers.

Requirements modeling - correct answer Fact-finding to describe the current system and identification of the requirements for the new system Output - correct answer Electronic or printed information produced by the system Input - correct answer Necessary data that enters the system, either manually or in an automated manner Process - correct answer Logical rules that are applied to transform the data into meaningful information Performance - correct answer System characteristics such as speed, volume, capacity, availability and reliability Security - correct answer Hardware, software and procedural controls that safeguard and protect the system and its data from internal or external threats JAD Disadvantages - correct answer - More expensive - Cumbersome if the group is too large JAD Advantages - correct answer - Users are more likely to feel a sense of ownership if they participate in the systems development process - More accurate statement of system requirements - Better understanding of common goals - Stronger commitment to the success of the new system Phases of RAD Development - correct answer 1. Requirements Planning 2. User Design 3. Construction 4. Cutover Requirements Planning Phase (RAD) - correct answer Combines elements of the planning and analysis phases of the SDLC. Users, managers, and IT staff members discuss business needs, project scope, constraints and requirements. User Design Phase (RAD) - correct answer Users interact with analysts and develop models and prototypes that represent all system processes, outputs and inputs. Construction Phase (RAD) - correct answer Focuses on program and application development tasks similar to SDLC, but users continue to participate and can still suggest changes or improvements Cutover Phase (RAD) - correct answer Resembles final tasks of SDLC implementation phase including data conversion, testing, changeover to new system and user training. RAD Advantage - correct answer System can be developed much more quickly with significant cost savings RAD Disadvantages - correct answer - RAD stresses the mechanics of the system itself and does not emphasize the company's strategic business needs. - Accelerated time cycle might allow less time to develop quality, consistency and design standards Functional Decomposition Diagram (FDD) - correct answer