2.7 what ict can provide

2.7 What ICT Can Provide

 Tweet your responses #ictdbs12

1. ICT provides what 6 features?2. Discuss ‘Fast, repetitive processing’3. Discuss ‘Vast storage capacity’4. Discuss ‘Improved search facilities’5. Discuss ‘Improved presentation of information’6. Discuss ‘Improved accessibility of information and services’7. Discuss ‘Improved security of data and processes’8. What limitations are there for what ICT can be used for?9. What limitations are there for what ICT systems can produce in terms of information?10. Why else might ICT not provide the appropriate solution?11. What 3 types of processing exist?12. Explain Batch Processing and give an appropriate example of when it might be used.13. Explain interactive Processing and give an appropriate example of when it might be used.14. Explain transaction Processing and give an appropriate example of when it might be used.15. What words could be used to distinguish between the 3 types of processing?

1. Fast, repetitive processing2. Vast storage capacity3. Improved search facilities4. Improved presentation of information5. Improved accessibility of information and services6. Improved security of data and processes

 Can perform calculations quickly Process repetitive calculations  Mapping DNA  Financial management  Rendering 3D

 Smaller storage space required Shared access to digital storage

 Search on multiple criteria Speed of search results

 Multimedia ◦ Animations ◦ Video ◦ Audio ◦ Images Websites Podcasts Online polls

 World Wide Web provides us with access to up-to-date, world wide news and information Blogs Social Networks Micro-blogging Instant messaging Chat rooms Forums Podcasts

 Encryption Biometrics Usernames and Passwords Privileges

 Issues with over spending, failure to produce solution, lateness Humans can still do many things better: ◦ Reasoning ◦ Opinions ◦ Speech

 GIGO Validation Verification Valued Judgments Digital from analogue

 Personal touch might be needed Quick pencil and paper notes might be more accessible than logging on setting up a document etc. Interpersonal communication (see doctor instead of NHS Direct)

INPUT PROCESS OUTPUTWhat do we know What do we know What do we know about this? about this? about this? ENTER PRESENT DATA INFORMATION

 All computers work on a basis of INPUT, PROCESS, OUTPUT The PROCESSING element can be treated differently depending on the circumstances. There are 3 modes of processing to consider ◦ Batch ◦ Transaction ◦ Interactive (Real Time) NOTE: There is some overlap between them; most transaction processing applications are also interactive

 What is it? ◦ Where data is collected together in a group (batch) before processing takes place. Characteristics ◦ When processing takes place there is no interaction between computer and user ◦ Usually performed overnight ◦ Large volumes of data can be processed efficiently ◦ Backing up is simple and can be done after each new job ◦ Tends to have strong error checking features built in (information produced is often accurate) ◦ Uses fewer system resources Appropriate contexts for use: ◦ Suited to regular jobs that happen at scheduled times and involve large quantities of data e.g.  A payroll system  Power Supply bills for customers  Processing cheques

Each time one person requires a parcel to be delivered to anothercountry it is not processed.You wait until several people require postals to that countryYou then get all the packages together, organise them and deliverthem on one plane journey

STEP 1 STEP 2Single transactions Each transaction is collected andare made stored in a transaction file. Transactions are sorted into same order as the records in the master file STEP 3Transaction Cheque Ac No. BATCH When the processing is 124 scheduled to run e.g. Cheque overnight. Each recordTransaction Ac No. Transaction File in the transaction file is 123 Cheque read with the Cheque Ac No. corresponding record of 123Transaction Ac No. the master file. An Cheque 127 Ac No. updated Master file is 124 then created Cheque Ac No. 127 Master File (e.g. All customers details including name, add. Balance etc.)

 What is it? ◦ There is interaction between the ICT system and the user. The user reacts to prompts from the system and system uses these prompts to process the data Characteristics ◦ Real time (immediate) ◦ input-, process, output controlled by the user Appropriate contexts for use: ◦ Flight control – automatic pilot using sensors to control the plane ◦ Games – high speed action games where an immediate response is needed

 What is it? ◦ Allows many users to access and update a system at apparently the same time. Each transaction must be completed before the next transaction begins. Characteristics ◦ Aims to work quickly with a large amount of different transactions ◦ Works with multiple users ◦ Master file is updates immediately ◦ Only one record of the master file is accessed ◦ Master file is always kept up-to-date ◦ Backing up is a problem Appropriate contexts for use ◦ Booking a flight  Requires multi-access as many travel agents need access to the same file but must be up-to-date as transactions are made so as not to double book ◦ Booking seats at a cinema ◦ Buying a shirt at a till in Topman  Many tills updating the same system but a new transaction at your till can not take place until your transaction has been completed

 Page 99 and 100 of the McNee and Spencer Text Book. Read both Case Studies and answer the ‘End of sub-Topic Questions’ 4, 5 and 6 (Page 100) For tomorrow’s lesson (This must be printed out prior to lesson NOT on your arrival to the lesson) ◦ Thursday detention if failure to complete OR failure to have printed out before the lesson

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2.7 what ict can provide

by mrmwood on Dec 13, 2011

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2.7 what ict can provide — Presentation Transcript