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 Newscaster Staff/Salesperson Subscriber TV show Newscast Agency Syndicated TV Series Movies Other Time slot Advertiser Commercial supervises Makes Purchases from gets contract Interested Airs Has discount Buys time for has d d d (0,N) (0,M) (1,N) (1,1) (1,N) Rates (0,N) (0,1) (1,N) (1,M) (1,1) (1,N) (0,N) (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 Applications 1) 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.