Berkeley Broadcasting Company

Database designed by:Ephrat Bitton

Calvin Chou

Shusaku Kawamoto

Abhay Mumbare

BBC in the Making: Overview

About BBC Operations Cost and revenue sources Database Requirements Queries/reports Future applications/improvements

The BBC

Privately owned TV station Airs family-oriented programs for Western

half of USA Programming includes:

News TV Series Movies

Operations

Produces own morning and evening newscast

Purchases syndicated programs from agencies Requires a fee per airing, depending on popularity

and season of episode

Purchases rights to air a movie from its producers

Operating Costs

Aside from overhead, costs include: Gratuities to producers of syndicated

programs Employee salaries Also pays membership fee for coalition of

cable broadcasting companies

Revenue

Profit is generated from: Paying viewers Advertising

Timeslots allotted in 30-second segments Cost predefined for particular blocks of time

each day

Competition

Competitors include: National cable broadcasting companies Local (free) stations

Database Requirements

Up-to-date availability of advertisement timeslots and pricing info

Tracking of customer ratings for future programming choices

Proper maintenance of employee info Ability to retrieve data for analysis or to

generate reports

Employee

NewscasterStaff/Salesperson

Subscriber

TV show

Newscast

Agency

Syndicated

TV Series

Movies

Other

Time slot

Advertiser

Commercial

supervises

Makes

Purchasesfrom

gets contract

Interested

Airs

Has discount

Buys time for

has

d d

d(0,N)

(0,N)(0,N)

(0,M)

(1,N)

(1,1)

(1,1)

(1,N)

Rates

(0,N)

(0,N)

(0,1)

(1,N)

(1,M)

(1,1)

(1,N)

(0,N)

(1,1)

(1,1)

(0,N)

(0,M)

Functions of Database

Electronic Forms – for data entry into database.

Update Query – to update information on customer.

Query/Form – to retrieve important information for analysis

Electronic Forms

Data entry into specific fields in tables for easy retrieval and analysis in the future

Before: Data stored in “flat” files that violated referential integrity constraints. Data also not consistent, thus making analysis difficult and time-consuming

After: Data entered via electronic forms. Referential integrity constraints enforced through use of “Combo Boxes”

Update Query

Subscribers get a rate reduction after being a customer for 1 year

Before: a manual search and update is required to make sure the most updated “subscription rate” is invoiced to the customer and the invoice is generated.

After: an update query is used to simultaneous update all the “subscription rate” and a report is used to generate all customer invoices.

Queries/Reports

Applications1) Salesperson receives call from Advertiser who wishes to

air a commercial in a particular time slot

2) The CEO wishes to review the revenue generation by BBC through the airing of commercial

3) A customer rating report is required to update the pricing of advertisements.

Future Improvements (technical)

Impose data validation rules on the fields in the electronic form – this imposes consistency in the entered data

Implement a security system to protect data

Future Applications

Establish web interface to allow subscribers to “choose” the program they wish to view. This will boost ratings and generate more revenue from advertisements.