5. DISCRETEMATH: SchedulingThe diagram below shows the activity network for a project, where activities A to G arerepresented by vertices and the duration of each activity (in hours) is represented by thenumbers beside each edge.12StartFinish13Calculate the EARLIEST start time and LATEST start time for each activity in thenetwork.(i)je(ii)Hence, determine thea)critical path of the networkb)LATEST finish time for Activity E.3.

Critical path: The network diagram shows the activities performed to complete the particular task…

Answered: 5. DISCRETEMATH: Scheduling The diagram…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Activity: Interaction Models Consider the university system. Departments offer courses. Professors teach courses. Students can declare majors and are admitted to university departments if they meet minimum requirements. Students and professors have schedules based on courses they take/teach. Courses have rosters, scheduled times, and instructors. Courses may get full. Students can request to sign up for courses, and if the course is not full and they meet pre-requisites, the course is added to their schedule and the course will have them as a student in that course. Students can also drop courses. Students should be informed of the consequences such as change of status from full-time to part-time, loss of scholarships, and delays in graduation. Perform the following: 1. Create a use-case diagram for this university. Make your use-case diagram as complete as you can. 2. Pick two use cases from your use case diagram, CourseAdd and CourseDrop, and describe these use cases in the standard…
Draw a diagram for use case for vending machine. 1. Actors: • User: Interacts with the vending machine to make a purchase. • Maintenance Personnel: Responsible for restocking the vending machine and performing maintenance tasks. 2. Use Cases: • Select Product: The user selects a product they want to purchase. • Insert Payment: The user inserts the required payment (e.g., coins, bills, or cards). • Validate Payment: The vending machine verifies the payment provided by the user. • Dispense Product: If the payment is validated, the vending machine dispenses the selected product. • Provide Change: If the user's payment exceeds the product's price, the vending machine provides change. • Refill Stock: Maintenance personnel refills the vending machine with products when they run out. • Perform Maintenance: Maintenance personnel performs routine maintenance tasks on the vending machine. 3. Relationships: • User interacts with the vending machine to perform use cases such as selecting a…
The following paragraph describes a pit stop in an FI race. Draw a process map of this activity that describes the roles of the different people and how they interact (that is a process map with "swim lanes"). An FI Pit Stop A) The pit stop starts by inflating the new tyres with nitrogen. Nitrogen is used instead of air as it copes with the temperature changes better. B) Then the tyres are placed in a heating blanket that will bring the tyres up to an optimal temperature. At this temperature they are very sticky and hold the car on the road very well. C) During the race, the pit stop activities start a few minutes before, the tyres are removed from their heating blanket, tools are manned, the pit crew take their positions.
SCENARIO A manufacturing company produce equipment and sell them. The company needs a system to manage stock operations. It is explained below. Equipments are manufactured by using parts. Name, manufacturing date, current status of manufacturing must be known. Some of the equipments must be tested. We want to define all parts with their name, description and type. Only the defined parts can be bought. Once parts are bought, they are located into shelves in warehouses. Each physical part uniquely identified with number. We want to know when each part is bought. Each bought part may have different warranty period. We have to use the bought part in manufacturing by taking this into account. Warehouses are located in different part of the company. Size, type of the warehouses may be different. Equipments are manufactured for customers. It is needed to know the equipments of customers. Some of the customers pay the transportation cost. Name, address, tax number type of the customer will…
Elaboration Deliverable #2 In elaboration #1 analysis was done, through the writing of a play. In elaboration #2 it is time to finish the analysis and do the initial design. In order to accomplish this, the following deliverables are required. 1. Create a sequence diagram showing the interactions of your play. 2. Create a class diagram from the sequence diagram created in step #2.
MAKE AN ACTIVITY DIAGRAM BASED ON THE SCENARIO ON THE ATTACHED PHOTO
Earliest Deadline First* (star) : In Given are seven tasks A,B,C,D,E, F,G with following precedence constraints described by the graph. All tasks arrive at time to = 0, have a common deadline d = 20 and the following execution times: CDEFG 2 5 1 A B C; 3 2 4 3 i. Modify the release times and deadlines so that EDF* can be used for its scheduling. ii. Assume the additional precedence constraint E > A. Is there still a feasible schedule for the above task set? Justify your answer.
I need —-> the sequence diagram for the "Request Assistance" use case.
made a case diagram
3
Rock Series: A site hosts many shows a year. Artists have a name and perform several times in a series (each is a show on a different date). Series have one or more artists and have a series name and a specified seating arrangement. A series is held in one (and only one) of several halls, each of which has a hall number. Represent this situation of shows and artists with an E-R diagram.

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