Why are integrity controls important? Using examples, describe the four types of integrity controls i.e. field combination, value limit, completeness (existence) and data validation that is used for input data

Why are integrity controls important? Using examples, describe the four types of integrity controls i.e. field combination, value limit, completeness (existence) and data validation that is used for input data

Case Study: State Patrol Ticket Processing System– The purpose of the State Patrol ticket-processing system is to record moving violations, keep records of the fines paid by drivers when they plead guilty or are found guilty of moving violations, and notify the court that a warrant for arrest should be issued when such fines are not paid in a timely manner. A separate State Patrol system records accidents and the verification of financial responsibility (insurance). But a third system uses ticket and accident records to produce driving record reports for insurance companies. Finally, a fourth system issues, renews, or suspends driver’s licenses. These four systems are obviously integrated, in that they share access to the same database; otherwise, they are operated separately by different departments of the State Patrol. When an officer gives a ticket to a driver, a copy of the ticket is turned in and entered into the system. A new ticket record is created, and relationships to the correct driver, officer, and court are established in the database. If the driver pleads guilty, he or she mails in the fine in a preprinted envelope with the ticket number on it. In some cases, the driver claims innocence and wants a court date. When the envelope is returned without a check and the trial request box has an “X” in it, the system does the following: notes the plea on the ticket record; looks up driver, ticket, and officer information; and sends a ticket details report to the appropriate court. A trial date questionnaire form is also produced at the same time and is mailed to the driver. The instructions on the questionnaire tell the driver to fill in convenient dates and mail the questionnaire directly to the court. Upon receiving this information, the court schedules a trial date and notifies the driver of the date and time. When the trial is completed, the court sends the verdict to the ticketing system. The verdict and trial date are recorded for the ticket. If the verdict is innocent, the system that produces driving record reports for insurance companies will ignore the ticket. If the verdict is guilty, the court gives the driver another envelope with the ticket number on it for mailing in the fine. If the driver fails to pay the fine within the required period, the ticket-processing system produces a warrant request notice and sends it to the court. This happens if the driver does not return the original envelope within two weeks, or does not return the court-supplied envelope within two weeks of the trial date. What happens next is in the hands of the court. Sometimes, the court requests that the driver’s license be suspended, and the system that processes driver’s licenses handles the suspension.Realtors Multiple Listing Service (MLS) system, which supplies information that local real estate agents use to help them sell houses to their customers. During the month, agents list houses for sale (listings) by contracting with homeowners. Each agent works for a real estate office, which sends information on listings to the Multiple Listing Service. Therefore, any agent in the community can get information on the listing. Much of the information is available to potential customers on the Internet. Information on a listing includes the address, year built, square feet, number of bedrooms, number of bathrooms, owner name, owner phone number, asking price, and status code. Additionally, many pictures and videos showing features of the listing are included. It is also important to have information on the listing agent, such as name, office phone, cell phone, and e-mail address. Agents work through a real estate office, so it is important to know the office name, office manager name, office phone, and street address. Specify whether field combination, value limit, and completeness (existence) integrity controls can be used for any of the following data fields (that are attributes for the entity “Ticket”) shown in the table below. Attributes Completeness Field combination Value limit Ticket number Date of offence Time of offence Type of ticket. Location. Fine amount. Plea (Guilty or Not Guilty) Trial date Verdict (Innocent or Guilty)

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