Question 1 Characteristics of bad systems To be useful‚ the information system must possess the characteristic of reliability‚ relevance‚ understandability‚ complete‚ accurate and comparability. However‚ in order for Encik Khalid to detect problems occur with the current or new system are based on the characteristics of bad system which are unreliable‚ irrelevance‚ not understandable‚ incomplete‚ inaccurate‚ and incomparable. The first characteristic is unreliable. Encik Khalid may detect the
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Interaction Diagram:- means a situation or occurrence in which two or more objects act upon one another to produce a new effect in an understandable format. Interaction is a part of dynamic behavior of the system represented in UML by two diagrams known as Sequence diagram and Collaboration diagram. Meaning of Collaboration Diagram:- also called a communication diagram or interaction diagram‚ is an illustration of the relationships and interaction between entities or objects in the Unified Modelling
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Behavior Diagrams Definition: Behavioral models describe the internal dynamic aspects of an information system that supports the business processes in an organization. During analysis‚ behavioral models describe what the internal logic of the processes is without specifying how the processes are to be implemented. Later‚ in the design and implementation phases‚ the detailed design of the operations contained in the object is fully specified. Use case diagrams are behavior diagrams used to describe
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Class Diagram A class diagram is at the heart of UML. It represents the core purposes of UML because it separates the design elements from the coding of the system. UML was set up as a standardized model to describe an object-oriented programming approach. Since classes are the building block of objects‚ class diagrams are the building blocks of UML. The diagramming components in a class diagram can represent the classes that will actually be programmed‚ the main objects‚ or the interaction between
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the use of QPSK. Euler’s relation is used to assist analysis of multiplication of sine and cosine signals. A SPICE simulation is used to illustrate QPSK modulation of a 1MHz sine wave. A phasor diagram shows the impact of poor synchronization with the local oscillator. Digital processing is used to remove phase and frequency errors. Since the early days of electronics‚ as advances in technology were taking place‚ the boundaries of both local and global communication began eroding‚ resulting in a world
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Scatter Diagram MGT350 October 1‚ 200 Tool and Techniques Paper: Scatter Diagram When faced with a problem‚ one can utilize various tools and techniques to try to solve the said problem. Depending on the way a person process his or her thoughts would greatly affect which tools or techniques might be the best for one to use. For example‚ if a person understands better by seeing the information‚ one might use a visual tool like a pie chart‚ bar graph or perhaps a scatter diagram; which
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BAR DIAGRAMS Bar diagrams are one of easiest and the most commonly used devices of presenting most of the business and economic data. These are satisfactory for categorical data or series. They consist a group of equidistant rectangles‚ one of each group or category of the data in which the values or the magnitudes are represented by the length or height of the rectangles‚ the width of the rectangles being arbitrary and immaterial. These diagrams are called one-dimensional because in such diagrams
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Exercise 1 1. Draw an E-R diagram for each of the following situations (if you believe that you need to make additional assumptions‚ clearly state them for each situation): a. A hospital has a large number of registered physicians. Attributes of PHYSICIAN include Physician_ID (the identifier) and Specialty. Patients are admitted to the hospital by physicians. Attributes of PATIENT include Patient__ID (the identifier) and Patient_Name. Any patient who is admitted must have exactly one admitting
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Venn Diagram Tracy Powell MATH 56 1/25/2015 Lok Man Yang Venn Diagram A Venn diagram is a visual tool to help students organize complex information in a visual way. The Venn diagram comes from a branch of mathematics called a set theory. John Venn developed them in 1891 to show the relationship between sets. The information is normally presented in linear text and students make the diagram to organize the information. It makes it easier when there is a lot of information‚ because with linear text
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Ishikawa diagram From Wikipedia‚ the free encyclopedia Ishikawa diagram Cause and effect diagram for defect XXX.svg One of the Seven Basic Tools of Quality First described by Kaoru Ishikawa Purpose To break down (in successive layers of detail) root causes that potentially contribute to a particular effect Ishikawa diagrams (also called fishbone diagrams‚ or herringbone diagrams ‚ cause-and-effect diagrams‚ or Fishikawa) are causal diagrams that show the causes of a certain event -- created
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