six entity types needed are listed in the case and in PE Figure 7-1. If you disagree‚ define additional entity types‚ explain why they are necessary‚ and modify PE Figure 7-1 accordingly. Answer will vary. Any additional entities should be properly modeled in an E-R diagram similar to Figure 7-1. 2. Again‚ review the DFDs you developed for the Petrie’s Electronics case (or those given to you by your instructor). Use these DFDs to identify the attributes of each of the six entities listed
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1. Degree versus cardinality of relationship 2. Required versus optional attributes 3. Data dependence versus data independence 4. Structured versus unstructured data (4*2.5 =10 marks) Answer 1 - Degree; cardinality. The degree (of a relationship) is the number of entity types that participate in that relationship‚ while cardinality is a constraint on the number of instances of one entity that can (or must) be associated with each instance of another entity. You may give an example of movie
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inventory will aid in the decision-making process of inventory purchases. A pivot table is a tool that can aid Kudler by sorting and sequencing the information in a database to aid the end user to see specific results of a query. Finally‚ an entity relationship diagram helps to visualize
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Rapid Application Development Model On the other hand‚ the proponent made use of the RAD (Rapid Application Development) as their methodology. RAD (Rapid Application Development) is a development lifecycle designed to give much faster development and higher-quality results than those achieved with the traditional lifecycle. RAD is used by the researchers to develop a high quality system that can both meet the needs of the customers and the call of versatility of the model that can adopt with the changes
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useful features that become especially important when the design is implemented. For example: The ASSIGN entity is shown to be optional to the PROJECT. This decision makes sense from a practical perspective‚ because it lets you create a new project record without having to create a new assignment record. (If a new project is started‚ there will not yet be any assignments.) The relationship expressed by “DEPARTMENT employs EMPLOYEE” is shown as mandatory on the EMPLOYEE side. This means that a DEPARTMENT
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on demand analysis What is the relationship between an operational data store and an analytical data store? Analytical Data Store uses reformatted operational data store info Relational Data Modeling Identify and define entities‚ relationships‚ and attributes Entity- square – a uniquely identifiable thing (person‚ order) Relationship – diamond – describes how two entities relate to one another Attribute – oval – a characteristic of an entity or relationship. Cardinality Defines the rules
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Project 4 Organization and Its Working 4 The existing system of functioning 4 The Processes Followed in the Company 5 Drawbacks of the Existing System 6 PROPOSED PROCUREMENT MANAGEMENT SYSTEM 7 Entity Relationship Diagram 7 Entities in the MIS: 8 Normalization 14 Analysis of Entity Relationship Diagram 16 The various associations with cardinalities are as follows 17 E-R Diagram of the Procurement Management System through MS-Access 20 E-R Diagram of the Procurement System through MS-Visio
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Management Info Systems QANL 3343 Management: Carrying out managerial functions to achieve a common goal Functions of Management: 1) Leading 2) Organizing 3) Planning 4) Controlling Information: Facts: Data: Facts about objects and events (color‚ weight‚ size‚ length‚ ect) measured by our senses or instruments. Information: Processed data: Methods of data processing: 1) Simple operations such as counting‚ sorting‚ categorizing‚ ect 2) Math/ Stat operations such as averages‚ sums‚ Std
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around Planned and Actual Flights‚ and the reservations made by customers of actual flights. | Contents Current Business Activities and Operations: 3 List of Business Rules: 4 Entities and Attributes: 5 Relationship Types: 6 Primary Keys: 7 Foreign Keys: 8 Normalization: 9 Entity Relationship Diagram: 10 Referencing: 11 Current Business Activities and Operations: Hotel reservation systems are used to track and maintain records of hotel schedules‚ visitor’s reservations and
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MGMT340 Chapter 7 Problems and Exercises Solutions Solution to Question 5 a. The figure shows a ‘many to many’ relationship. Therefore‚ any EMPLOYEE can work on a PROJECT and there can be several PROJECTS with several EMPLOYEES working on them. b. The degree shown in the used_on relationship is “one to many” with a minimum cardinality of zero. (The zero through the line near the ‘task’ entity means a minimum cardinality of zero‚ whereas the crow’s-foot notation means a “many” maximum cardinality‚ (George
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