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What you MUST know before a database system
development
New Denver airport• Twice the size of Manhattan, NY• 10 times wider than London airport• Big enough to land three jets simultaneously-in
bad weather– 3 parallel North-South runways, 2 parallel East-West
runways, and room for a total of 12 runways.• Baggage Logistics information system
– One of kind…– Expensive: $1.7 billion (original price in early 1990s) – Very large size….– The most advanced and sophisticated automated
baggage handling system
Scale of the system• 21 miles of steel track
– Tearing like intelligent coal-mine cars• 4,000 independent "telecars" route and deliver
luggage between the counters, gates and claim areas of 20 different airlines.
• Size of the system– 100 computers are networked to one another and to
5,000 electric eyes– 400 radio receivers– 56 bar-code scanners orchestrates the safe and timely
arrival of every valise and ski bag.
Result
• Scheduled to open Oct 1993• Delayed 16 months because of system glitches…
one of the database problem:– DB problem: incorrect data (incorrect system program)– Garbage in, Garbage out
• Original price: $1.7 billion• Final cost: more than $ 5 billion
Importance of Database in Logistics and Supply Chain Mgmt.
• Federal Express and UPS
• Wal-Mart
• War in middle east
System OwnersSystem owners – an information system’s sponsor and executive advocate, usually responsible for funding the project of developing, operating, and maintaining the information system.
– Top Management (CEO, CFO, CIO…)Primary Concerns - how much will the system cost? - how much value or what benefits will the system return to the business?
System Users
System users – a “customer” who will use or is affected by a system on a
regular basis • Primary concern: get the job done
using the system– Internal users
• Clerical and service workers, technical and professional staff, supervisors, middle managers, and executive managers
– External users• Internet EC consumers, suppliers, partners…
System Designers and System Builders
System designer – a technical specialist who translates system users’ business requirements and constraints into technical solution.
– DBAs, Network architects, web designers, security experts…System builders – a technical specialist who constructs information systems and components based on the design specifications generated by the system designers.
– Programmers (applications, systems, and DB), network administrators, web masters..
Systems Analysts
Systems analyst – a specialist who studies the problems and needs of an organization to determine how people, data, processes, and information technology can best accomplish improvements for the business.
Roles:− Bridge (facilitator: next slide) between
management and technical specialist− Understand both business and computing− Initiate change within an organization− Ultimately, a problem solver
The Systems Analyst as a Facilitator
Where Do Systems Analysts Work?
Skills Needed by the Systems Analyst• Good interpersonal communication skills
– Business writing class– Technical business skill class
• Good interpersonal relation skills• Flexibility and adaptability• Working knowledge of (existing and emerging) IT• Computer programming experience and expertise• General business problem-solving skills• Character and ethics