System Analysis and Design
Assignment: 1. Describe three traditional techniques for collecting information during analysis. When might one be better than another? 2. What are the general guidelines for collecting data through observing workers?
3. What is the degree of a relationship? Give an example of each of the relationship degrees illustrated in this chapter.
Please make sure the assignment follows APA FORMAT. Also the citation and the references are two important factors of getting good grade for the assignment.
Again the deadline for this assignment is by Thursday no later than 11:59 PM IST.
For any questions and concerns please do not hesitate to contact me.
Chapter Objectives
After studying this chapter, you should be able to:
■ Concisely define each of the following key data-modeling terms: conceptual data model, entity-relationship diagram, entity type, entity instance, attribute, candidate key, multivalued attribute, relationship, degree, cardinality, and associative entity.
■ Ask the right kinds of questions to determine data requirements for an information system.
■ Draw an entity-relationship (E-R) diagram to represent common business situations.
■ Explain the role of conceptual data modeling in the overall analysis and design of an information system.
■ Distinguish between unary, binary and ternary relationships, and give an example of each.
■ Distinguish between a relationship and an associative entity, and use associative entities in a data model when appropriate.
■ Relate data modeling to process and logic modeling as different ways of describing an information system.
■ Generate at least three alternative design strategies for an information system.
■ Select the best design strategy using both qualitative and quantitative methods.
Chapter Preview …
In Chapter 6 you learned how to model and analyze the flow of data (data in motion) between manual or automated steps and how to show data stores (data at rest) in a data-flow diagram.
3. What is the degree of a relationship? Give an example of each of the relationship degrees illustrated in this chapter.
Please make sure the assignment follows APA FORMAT. Also the citation and the references are two important factors of getting good grade for the assignment.
Again the deadline for this assignment is by Thursday no later than 11:59 PM IST.
For any questions and concerns please do not hesitate to contact me.
Chapter Objectives
After studying this chapter, you should be able to:
■ Concisely define each of the following key data-modeling terms: conceptual data model, entity-relationship diagram, entity type, entity instance, attribute, candidate key, multivalued attribute, relationship, degree, cardinality, and associative entity.
■ Ask the right kinds of questions to determine data requirements for an information system.
■ Draw an entity-relationship (E-R) diagram to represent common business situations.
■ Explain the role of conceptual data modeling in the overall analysis and design of an information system.
■ Distinguish between unary, binary and ternary relationships, and give an example of each.
■ Distinguish between a relationship and an associative entity, and use associative entities in a data model when appropriate.
■ Relate data modeling to process and logic modeling as different ways of describing an information system.
■ Generate at least three alternative design strategies for an information system.
■ Select the best design strategy using both qualitative and quantitative methods.
Chapter Preview …
In Chapter 6 you learned how to model and analyze the flow of data (data in motion) between manual or automated steps and how to show data stores (data at rest) in a data-flow diagram.