INF2004F Summary Notes.docx

Computer operators trained to use this system

Info icon This preview shows pages 6–8. Sign up to view the full content.

Computer operators trained to use this system Difficult to debug batch systems Some job takes too much time – other jobs might need to wait for a long time Real time processing - process data immediately after capture & provide updated information on real time basis - Online, real time systems (OLRS) process input immediately and provide output back to users - Transactions aren’t accumulated into batches; on input are applied immediately to update master file using random access updating - Immediate processing; direct processing- master files are always up to date and response to user inquiries are immediate Advantages: Accessible Errors are known instantly Cost savings Better sales insight – might lead to additional revenue Quick response to inquiries Disadvantages: Server must be always online and available Expensive- increased cost and complexity of system operations Not secure- susceptible to errors arising from erroneous or fraudulent input More sensitive to hardware and software errors Printed output isn’t usually produced i.e. no human verifiable evidence Components of extended supply chain systems: 3 technologies make it feasible: - POS (point of sale) systems- input sales data into computer for immediate processing - Bar coding technology- UPC bar code systems allow all participants in the real time system chain to chare and process the same basic data - EID (electronic data interchange) ordering system- direct computer to computer exchange of business documents via a communications network The output system: Can be manual or electronic or something in between Most manual batch orientated systems with sequential file processing produce very large volumes of output Online, real time electronic systems tend to produce very little reference type output Output controls are designed to check that processing results in valid output and that outputs are distributed properly
Image of page 6

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

A separate EDP control group is often established to monitor EP operations Typically, an output distribution register is maintained to control the disposition of reports ERPs Highly complex information system – integrates activities from entire organisation Information stored in centralised database – better flow of information Advantages: Easier to maintain and backup data Once updated in centralised database, outdated data no longer available Accessible by other departments Data is captured at once Improve customer service Disadvantages: Time consuming Expensive Vendor dependence Feature and complexity Module 4: Controls and audit of accounting Computer Fraud [chapter 5] Why is computer fraud important? Especially to accountants/auditors?
Image of page 7
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern