UNIVERSITY OF EDUCATION, WINNEBA
COLLEGE OF TECHNOLOGY EDUCATION, KUMASI
May 22, 2013
DEPARTMENT OF INFORMATION TECHNOLOGY EDUCATION
SYSTEMS ANALYSIS & DESIGN
MAXWELL DORGBEFU JNR.
QUESTION 1 HUMAN COMPUTER INTERACTION (HCI) 1
REASONS WHY HUMAN-COMPUTER INTERACTION (HCI) IS RECOMMENDED TO SYSTEM ANALYSTS. 2
QUESTION 2 COST BENEFIT ANALYSIS (CBA) 3
TECHNIQUES USED IN PERFORMING COST BENEFIT ANALYSIS (CBA) IN INFORMATION SYSTEM DEVELOPMENT. 3
QUESTION 3 REAL WORLD SYSTEM
PAYROLL SYSTEM What the PAYROLL SYSTEM does; How the PAYROLL SYSTEM works; ENTITIES AND PROCESSES IN THE PAYROLL SYSTEM PROCESSES IN PAYROLL SYSTEM CONTEXT DIAGRAM CONTEXT DIAGRAM OF PAYROLL SYSTEM LEVEL ZERO DATA FLOW DIAGRAM LEVEL ZERO DATA FLOW DIAGRAM OF PAYROLL SYSTEM
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HUMAN COMPUTER INTERACTION (HCI)
Human Computer Interaction (HCI) is defined as the study of interaction between people (users) and computers. It is often regarded as the intersection of computer science, behavioral sciences, design and several other fields of study. (Wikipedia, 2013) HCI is a discipline concerned with the design, evaluation and implementation of interactive computer systems for human use and with study of major phenomena surrounding them. (ACM SIGCHI, 1992)
(Compter, n.d.), Human-Computer Interaction, a discipline concerned with the study, design, construction and implementation of human-centric interactive computer systems. HCI (human-computer interaction) is the study of how people interact with computers and to what extent computers are or are not developed for successful interaction with human beings. (Rouse, n.d.)
Human Computer Interaction (HCI) is an area of research and practice that emerged in the early 1980s, initially as a specialty area in computer science embracing cognitive science and human factors engineering. As computers become more and pervasive in culture, designers are increasingly looking for ways to make interfacing with devices easier, safer and more efficient. A significant number of major corporations and academic institutions now study HCI.
REASONS WHY HUMAN-COMPUTER INTERACTION (HCI) IS RECOMMENDED TO SYSTEM ANALYSTS. 1. The basic goal of HCI is to improve the interactions between users and computers by making computers more usable and receptive to the user's needs. Specifically, HCI is concerned with; ï· Methodologies and processes for designing interfaces (i.e., given a task and a class of users, design the best possible interface within given constraints, optimizing for a desired property such as learnability or efficiency of use) ï· ï· ï· ï· Methods for implementing interfaces (e.g. software toolkits and libraries; efficient algorithms) Techniques for evaluating and comparing interfaces. Developing new interfaces and interaction techniques. Developing descriptive and predictive models and theories of interaction.
2. A long term goal of HCI is to design systems that minimize the barrier between the human's cognitive model of what they want to accomplish and the computer's understanding of the user's task. ï·
Professional practitioners in HCI are usually designers concerned with the practical application of design methodologies to real-world problems. Their work often revolves around designing graphical user interfaces and web interfaces.
Researchers in HCI are interested in developing new design methodologies, experimenting with new hardware devices, prototyping new software systems, exploring new paradigms for interaction, and developing models and theories of interaction.
COST BENEFIT ANALYSIS (CBA)
Cost Benefit Analysis (CBA), sometimes called BenefitâCost Analysis (BCA), is defined in System Analysis & Design as systematic process for calculating and comparing benefits and costs of a project. Cost-Benefit Analysis is used by System Analyst...
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