Systems Analysis and Design (Shelly Cashman Series) (MindTap Course List)
11th Edition
ISBN: 9781305494602
Author: Scott Tilley, Harry J. Rosenblatt
Publisher: Cengage Learning
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Chapter TPC, Problem 8RQ
Program Plan Intro
Definition of present value and an example.
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Define the term present value, and provide an example
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Q : Draw an ERD from the following business rules: Use proper notations for the type of attributes.
A software system is to be developed for an educational institute. The software is intended to be used by faculty members, students and designated support staff. System administrator will also use system for system administration and management. Student’s data including names, registration number, cell numbers and address will be added and edited by Clerk. The data will be added at the time of student reporting at campus. Student can enroll into any course of their choice from the offered courses. They can also request for dropping a course. Approval of course dropping of a student will be granted or refused by academic coordinators.
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- Write the business rules that are reflected in the ERD shown in Figure P2.15. (Note that the ERD reflects some simplifying assumptions. For example, each book is written by only one author. Also, remember that the ERD is always read from the “1” to the “M” side, regardless of the orientation of the ERD components.) FIGURE P2.15 THE CROW’S FOOT ERD FOR PROBLEM 15arrow_forwardExplain the distinction between entity type and entity instance.arrow_forwardLuxury-Oriented Scenic Tours (LOST) provides guided tours to groups of visitors to the Washington, D.C. area. In recent years, LOST has grown quickly and is having difficulty keeping up with all of the various information needs of the company. The company's operations are as follows: LOST offers many different tours. For each tour, the tour name, approximate length (in hours), and fee charged is needed. Guides are identified by an employee ID, but the system should also record a guide's name, home address, and date of hire. Guides take a test to be qualified to lead specific tours. It is important to know which guides are qualified to lead which tours and the date that they completed the qualification test for each tour. A guide may be qualified to lead many different tours. A tour can have many different qualified guides. New guides may or may not be qualified to lead any tours, just as a new tour may or may not have any qualified guides. Every tour must be designed to visit at least…arrow_forward
- List the Entity-Relationship (ER) model's various characteristics.arrow_forwardA college course may have one or more scheduled sections or may not have a scheduled section. Attributes of COURSE include Course ID, Course Name, and Units. Attributes of SECTION include Section Number and Semester ID. Semester ID is composed of two parts: Semester and Year. Section Number is an integer (such as 1 or 2) that distinguishes one section from another for the same course but does not uniquely identify a section. How did you model SECTION? Why did you choose this way versus alternative ways to model SECTION?arrow_forwardDesign: An (ER) and (relational Diagram) by showing as I am an owner of a car rental company website describing the following domain: I am the owner of the website, and I see the registered customers records I have through different car types and car rental Every rental operation has a start or end by day or KM Every car has a different price depending on its year production and model We have three rental types( Per Kilometers, monthly, daily) in different prices even though it was the same car Any one can enter his 'id' which includes ( Name, age, gender, address, city, Civil id), and this 'id' is the primary ket to all entities He would proceed to register for renting a car per his choice Then he will send the registrations form that I will analyze and contact him Every customer can rent only one car This choice has one car rental type based on the available listed cars in the registration The owner of that website has the "id" records and the registration database running its…arrow_forward
- Draw a use diagram that includes the entities and methods. Use example figure 6-15 as a guide.arrow_forwardEntity Relationship Diagram of the business, as shown in the case. Completely and correctly specify all Entities, Relationships and Attributes Order: has one or many items; half by member half by anonymous member (no member number)Has: order number, each order item has total cost (with and without gst), number of store, cashier who took the order, member number (if provided), date on which the order was places, and, if the order is not picked up in-person, the date on which the order is shipped. Order-Item (one of the 1600 products):to identify: useorder number as well as a small “item sequence number” (which is unique within each order). product number, quantity ordered and the actial "unit price paid" If a valid member number is on the order, the system should use the product’s special “member price”, otherwise the product’s “regular price” is used. The average order includes 11 distinct order-items. Member (places 5 orders per month on avg):last name, given names, email…arrow_forwardEntity-Relationship Diagram (ERD) is one of the data modeling tools that provides a software engineer with the ability to represent data objects, their characteristics, and their relationships. Use an ERD to describe the following scenario. A teacher is identified by an ID number (TID), last name (LName), and first name (FName). A project is identified by a project ID (PID) and title (T). A student is identified by an ID number (SID), last name (LName), and first name (FName). A teacher can supervise zero, one, or many students and a student is supervised by one teacher. A teacher must propose one or many projects and every project is proposed by one teacher. A student must work on one project and every project is worked by only one student.arrow_forward
- A derived attribute can be stored in a table or calculated on each occasion that it is required. An example of a derived attribute is your Grade Point Average which is calculated by adding together a score for each unit (e.g., HD=4, D=3, C=2, P=1, N=0) and dividing that by the number of units you have completed. Explain how the decision as to whether the Grade Point Average would be stored in a table or calculated would be made. You are administering a database in a large retail company that records sales at each of the company’s stores. Tuning the database to improve performance by adding indexes and optimising query execution is an important ongoing aspect of the physical database design. Which attributes in a database such as this (apart from the primary key) are likely to BENEFIT from being indexed? Which attributes would you generally avoid indexing, and why?arrow_forwardThe definition of a variable is required to contain, in addition to the variable's name, the variable's "type" as well as the variable's "additional attributes." Every variable may be assigned to more than one data type. If you could describe the concept, would it be possible for us to more accurately define any variables in the future?arrow_forwardDraw the associations that are described by the following business rules. Include the multiplicities for each relationship. (4 marks) A patient must be assigned to only one doctor, and a doctor can have one or many patient: An employee has one phone extension, and a unique phone extension is assigned to an employee. A bookstore sells at least one book, and a book can be sold at up to 10 other bookstores around town.arrow_forward
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