• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17

The Value of Data and the Use of Databases

Extracts from this document...


The Value of Data and the Use of Databases Data is valuable for a number of reasons: * It takes time to compile. * It takes time to input the data into the computer. * Its historical value * It can be analysed, accurate, and up-to-date. Data can be very valuable to an organisation providing it can be clearly analysed. An example of the value of data is the use of stock control systems. As the data about stock can be updated each time a stock item is sold, the stock situation is always up-to-date. This means that, as soon as the amount in stock falls below a reorder level, an order can be placed. Indeed, many systems trigger the reordering automatically as soon as the number in stock falls below its reorder level. This is often done by the system sending the order to the supplier using electronic data interchange (EDI). This automatic stock reordering has two cost effects. First it means that the organisation should rarely run out of stock which causes a loss of sales and, hence, loss of income. It also means that the organisation should not need to store large quantities of stock which leads to high inventory costs. If the organisation also keeps data showing the rates of sales of products, the system can recognise changes in these rates and so change its ordering patterns. Thus, data about products in stock and rates of sales is valuable as they improve the profitability of the organisation. In order for data to be of value they must be accurate and up-to-date. Often data are inaccurate due to them not being frequently updated. If the sales figures are only used once a week to update the stock database, the stock levels are soon out of date and the data have little value. These days banks offer services other than banking. ...read more.


voltage) drops as the distance increases. Repeaters can be used to connect two segments of a network. It repeats data from one segment to another, enhancing the signal, as shown below. Repeaters do not segment a network and do not partition a network into sub-networks. They simply extend a network. 2) Hub. These are used to connect many computers to one computer. For example, in a star network, all the cables from each individual computer go back and connect to a hub. The hub then connects to the server. Hubs can also boost signal strength if needs be. 3) Switch. A switch is a more 'intelligent' hub. It can set up communication paths between different clients and different servers, for example, at the same time. If a user has large files to transmit, or a large volume of data, then switches would be more appropriate than hubs. Newer technology replaces hubs with switches. This allows greater speed because each station is switched in and thus has full network speed. Switches 'learn' which connections are required and join the corresponding ends. If, at the same time, Station 1 wishes to communicate with Print Server , Station 2 with Web Server, Station 3 with File Server and Station 4 with Mail server, this is possible as the switch will set up four independent paths. This means that data can flow at maximum speed along each as the system will be treated as four independent circuits. 4) Bridge. A bridge connects two similar LANs together. Users think it is logically one LAN even though it is physically two. Bridges enable the users of one network to use the resources of the other. 5) Modem A modem provides a 'dial-up connection' for a computer. It is used typically to allow a computer (which is a digital device) to communicate with other computers using the public telephone system (which is largely an analogue system). ...read more.


This has reduced the need for paperwork, has meant that work cannot get lost; there is an audit trail of when work was handed in, marked and returned and the lecturer can retrieve, mark and return work from anywhere. Supermarkets' stock is now monitored and re-ordered automatically using computerised stock control systems. This has removed some of the tasks that used to be done by workers, for example, making a decision about when to reorder. The collection of sales information has also led to the growth of data mining and data warehousing. These industries have helped companies maximise their profits. Kitchen designers now design kitchens using sophisticated 3D design software. You take in your kitchen measurements, they tap them in to their software and you can then get a very good picture of what your final kitchen would look like from a variety of angles. This has decreased the likelihood of misunderstandings between sales staff and customer and has helped the customer to picture exactly what they will be getting. The use of automated speed traps to catch speeding motorists has helped reduce the number of police hours tackling this particular problem. Improved quality Computerised technology has not only bought about changes in the way people work but also in the quality of work produced. The flat-pack kitchen manufacturing process has improved over the years. Sophisticated computer technology has meant that self-assembly furniture is now manufactured very accurately. This means not only greater customer satisfaction but also less time and money spent. The increasing use of robots in the car manufacturing industry has meant that less time needs to be spent correcting human errors. Robots can produce work to a much higher standard than humans. They can work to finer tolerances and can produce higher quality work consistently. The quality of animation used for entertainment has improved considerably. If you compare the animation in Jurassic Park or Toy Story, for example, with that from films made a few decades ago there is a world of difference. Use of systems & Data James Leong Mook Seng 1 A2 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Computer Science section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Computer Science essays

  1. Marked by a teacher

    An introduction to Identity Theft

    4 star(s)

    In some cases the criminal will have a website set up which will require the input of banking/personal information; it will also enable the victim to view fictitious "bank accounts" with seemingly large available balances ready to transfer to him/her.

  2. Peer reviewed

    Principles of Computer Networks

    3 star(s)

    to hitchhike a connection can use the WAN connection it is not protected. WAN are slow and expensive to set-up. They also need a good firewall to stop intruders using the connection. Client/Server Network The client is a application on a workstation dependent upon a server to do the operations.

  1. Computing Project

    Rent Out Button begin Adoloans.open; if adoloans.locate('dvdid',strtoint(DBEdit1.text),[]) then showmessage('Already on loan') else begin xmem:= strtoint(dblkcbxmembers.text); adoqtoomany.Parameters[0].value:=xmem; adoqtoomany.Open; if ADOQtoomany.recordcount>=3 then showmessage ('You Can Only Borrow A Maximum of 3 DVD''s') end; This algorithm will be used to draw up and display messages if a member is trying to borrow more than 3 DVDs or the DVD he or she wants to borrow is already on loan.

  2. System Analysis The aim of the Jewellery store system is to make the work ...

    Phase 7: Implementation After having the user acceptance of the new system developed, the implementation phase begins. This stage also involves two activities as follows: 1. The user training The users are to be given training for operating a new information system.

  1. Business blue print document for the implementation of SAP R/3 (4.6B) payroll at Mastek ...

    * Housing (HRA/CLA/COA) infotype (0581) * Exemptions infotype (0582) * Car & Conveyance infotype (0583) * Income from other sources infotype (0584) * Section 80 deductions infotype (0585) * Investment details (Section 88) infotype (0586) * Provident fund contribution infotype (0587) * Other statutory deductions infotype (0588) * Long term reimbursements infotype (0590)

  2. System I designed in order to produce a promotion package for her newly formed ...

    13/10/00 - Make a statement giving reasons which hardware and software is required for my system to run effectively 14/10/00 - Check through Analysis section 15/10/00 - Start Design section and examine and evaluate alternative methods of creating my system and explain what changes will be required based on my

  1. Computing Project

    Calculate the number of lessons so far Student Number Calculate the total amount spent Student Address Add a student Lesson Code Edit a student Price Per Lesson Delete a student Date and time of next lesson Search a Student Day Booked Search Availabilities Time Booked Edit a booking File Outputs

  2. Explain the component parts of a computer system - Include both hardware, software and ...

    Ink jet printers come in colour as well as black and white and are consequently the printers that are most suitable for use within the home. Backing Store (Memory) The power of a computer is related to its ability to store and retrieve information.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work