Implementing computer-based information systems

not finished but in a rush because this is homework!

  • Created by: Charlotte
  • Created on: 21-04-13 16:25
View mindmap
  • Implementing computer-based information systems
    • client involvement during the development of a custom-written software system
      • selecting - depend on many factors
        • custom-wiritten: user will specify functions of the software and the system will be developed to incorporate those functions. User can sell the software to other companies
        • custom-written: if mistakes are found in the code, then it may take some time to find and fix them.
        • Off-the-shelf: choice of manufactururs are sometimes greaterand the software is readily available.
        • off-the-shelf: functions included which are not needed by the user, and they cannot be removed. Also a large memory footprint.
      • implementing & supporting
        • staff need to be reassured that they are not losing their jobs
        • training sessions for staff to ensure they can be confident with using hte system
        • new system may cause problems despite testing etc,this may impacet on customers e.g. incorrect invoices.
    • custom-written and off the shelf software
        • custom-written
          • developing a system custom built for the client based on the end user's specified needs
        • off-the-shelf
          • any software  that can be purchased, installed and used immediately.
    • Installation methods
      • Parallel
        • old & new system run concurrently until there is complete confidence in new system
      • phased
        • system put in place in several smaller subsystems. each introduced one at a time, ensuring that each is working before the next is commissioned.
      • direct
        • new system completely replaces the old system on a given time.
      • pilot
        • requires selected dept. to use the new system. Once confidence is high, the new system can be implemented into another dept. and so on until all are using new system.
    • factors to be considered when selecting implementation methods
      • impact on organisation, staff, data/information
    • reviews
      • scheduelling
        • using a planned, schedueled review strategy will ensure that the system continues to provide satisfactory levels of performance to the users.
        • reviews of system can be schedueled to coincide with changes in the operation of the organisation using the system.
        • external changes may be legislation changes, including tax and VAT and data protection updates,
    • maintenance
      • perfective
        • when it may be good to change to enhance system performance. Requests from the end user e.g. more shortcut keys to help carry out proccesses & more online help etc
      • adaptive
        • when organisation has a new need that the system must fulfil. For example, because of legislation etc.
      • corrective
        • if there are any errors in the software. 2 types of error: 'programming error' (programmer made a mistake) and 'logic error' (system doesn't work/produce expected output as it was meant to
        • usually resolved though the use of patches.
    • decision about upgrading/installing software and hardware may depend on expertise of staff, prices, benefits, current systems
      • cost benefit analysis should consider the costs incurred, e.g. staff training.
      • if new software is installed, then the cost of the licenses needs to be considered.
      • new software must run on old system


Mr A Gibson


Quite a useful mind map of the main considerations when deciding to implement a new ICT system. This could be used to revise this part withing the systems lifecycle or used as reference when developing a system, as a useful aid to the analysis section.





Gdzie grać w gry hazardowe



Jestem trochę hazardzista i do wyboru kasyna podszedłem odpowiedzialnie i zdecydowałem się na kasyno online który ma licencję i wszystkie automaty od najlepszych twórców i maksymalnych zysków, a także imponujące bonusy, które pomagają wygrywać więcej. To, co mi się podoba, to natychmiastowe wycofanie z minimalną prowizją.



general term, computer-based information systems (CBIS), is a constellation of a variety of information systems, such as office automation systems (OAS), transaction processing systems (TPS), management information systems (MIS), and management support systems (MSS). One can hire reactjs developers to get to know more in Details

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