Question

Draw YOUR entity relationship diagram (ERD) using Crow's foot notation to indicate entities, relationships, connectives, and participations.

The administrators of Tiny College are so pleased with your design and implemen-
tation of their student registration and tracking system that they want you to expand
the design to include the database for their motor vehicle pool. A brief description
of operations follows:
• Faculty members may use the vehicles owned by Tiny College for officially sanc-
tioned travel. For example, the vehicles may be used by faculty members to travel
to off-campus learning centers, to travel to locations at which research papers are
presented, to transport students to officially sanctioned locations, and to travel
for public service purposes. The vehicles used for such purposes are managed by
Tiny College’s Travel Far But Slowly (TFBS) Center.
• Using reservation forms, each department can reserve vehicles for its faculty, who
are responsible for filling out the appropriate trip completion form at the end of
a trip. The reservation form includes the expected departure date, vehicle type
required, destination, and name of the authorized faculty member. The faculty
member who picks up a vehicle must sign a checkout form to log out the vehicle
and pick up a trip completion form. (The TFBS employee who releases the vehicle
for use also signs the checkout form.) The faculty member’s trip completion form
includes the faculty member’s identification code, the vehicle’s identification, the
odometer readings at the start and end of the trip, maintenance complaints (if any),
gallons of fuel purchased (if any), and the Tiny College credit card number used to
pay for the fuel. If fuel is purchased, the credit card receipt must be stapled to the
trip completion form. Upon receipt of the trip completion form, the faculty mem-
ber’s department is billed at a mileage rate based on the vehicle type used: sedan,
station wagon, panel truck, minivan, or minibus. (Hint: Do not use more entities
than are necessary. Remember the difference between attributes and entities!)

•  All vehicle maintenance is performed by TFBS. Each time a vehicle requires
maintenance, a maintenance log entry is completed on a prenumbered mainte-
nance log form. The maintenance log form includes the vehicle identification,
brief description of the type of maintenance required, initial log entry date, date
the maintenance was completed, and name of the mechanic who released the
vehicle back into service. (Only mechanics who have an inspection authorization
may release a vehicle back into service.)
• As soon as the log form has been initiated, the log form’s number is transferred to
a maintenance detail form; the log form’s number is also forwarded to the parts
department manager, who fills out a parts usage form on which the maintenance
log number is recorded. The maintenance detail form contains separate lines for
each maintenance item performed, for the parts used, and for identification of the
mechanic who performed the maintenance. When all maintenance items have
been completed, the maintenance detail form is stapled to the maintenance log
form, the maintenance log form’s completion date is filled out, and the mechanic
who releases the vehicle back into service signs the form. The stapled forms are
then filed, to be used later as the source for various maintenance reports.
• TFBS maintains a parts inventory, including oil, oil filters, air filters, and belts of
various types. The parts inventory is checked daily to monitor parts usage and to
reorder parts that reach the “minimum quantity on hand” level. To track parts
usage, the parts manager requires each mechanic to sign out the parts that are
used to perform each vehicle’s maintenance; the parts manager records the main-
tenance log number under which the part is used.
• Each month TFBS issues a set of reports. The reports include the mileage driven
by vehicle, by department, and by faculty members within a department. In addi-
tion, various revenue reports are generated by vehicle and department. A detailed
parts usage report is also filed each month. Finally, a vehicle maintenance sum-
mary is created each month.
Given that brief summary of operations, draw the appropriate (and fully labeled)
ERD. Use the Crow’s foot methodology to indicate entities, relationships, connectiv-
ities, and participations.

Answer 1

May this will help you...

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