• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Introducing a new system using the Systems Life Cycle

Extracts from this document...


Introducing a new system using the Systems Life Cycle 1. * The current system may no longer be suitable for its purpose * Technological developments may have made the current system redundant or outdated * The current system may be too inflexible or expensive to maintain 2. Information systems fail for many reasons at any stage of the systems life cycle:- Analysis Not enough time / money spent on analysis Objectives poorly defined Not enough staff / lack on continuity Users not sufficiently involved Analysts have poor communication skills / do not establish what the requirements are Design Users not involved Meets original design but not flexible for minor changes Management not involved Major changes to procedures implemented without consideration on staffing impact Programming Not enough time to complete programming / not enough computing resources Programmers have insufficient skills Not enough staff / lack on continuity Poor documentation - problems with staffing changes Testing No thorough testing plan Lack of user involvement No ...read more.


If the preliminary survey identifies a problem then the objectives of the system will be defined at this stage. Feasibility Study The existing system is looked at briefly and various alternatives (such as replacing the existing system or upgrading it or extending it) are considered. A formal report is prepared for management identifying the solution the greatest cost benefit. Management can then decide whether or not to proceed to the next stage System Investigation Information about the existing system is collected. Methods used to carry out the system investigation will include looking at existing system documents, questionnaires, interviews and direct observation.. This information will be used to determine the information requirements of the system during the design stage. As part of the system investigation the remaining stages will be described and a time scale determined. Systems Analysis At this stage the information gathered during the system investigation is used to analyse the existing system, determining exactly what functions it performs and what problems need to be overcome. ...read more.


Design will normally be structured to follow a top-down methodology. The overall problem will be broken down in to smaller and smaller sub-problems which will then be solved System Implementation The system is produced. Program code is written so that the design specified in the design stage is turned into a real system. The system is tested, staff trained and old files converted to the new system or new files set up and the existing system is changed over to the new one. Changeover may be direct - the old system is discontinued and the new one takes over or parallel - where the new system is run alongside the existing until it is bedded in. An alternative is to run the new system as a prototype. Review and maintenance The System delivered is measured against the system requirements documentation and its performance monitored. Inevitably some aspects of performance will be unsatisfactory and this will lead back to the first stage of the system life cycle which then repeats over again. ...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

    The systems development life cycle (SDLC) is a conceptual model used in project management ...

    3 star(s)

    If our project were to be painting a landscape, you might think of wireframes and paper prototypes as the early sketches on a notepad, or some under-painting. In other words, suggesting the basic shape but not saying much about the details and is can be used to design application interfaces as well.

  2. Peer reviewed

    information systems assignment 2

    4 star(s)

    both program and create a database as well as use one Storing information Databases store information in a very structured way based on the information and the data which has or is being entered into the system. Databases can store information based on the actual field it is being used in (e.g.

  1. Computing Project

    The user will first have to setup a username and password which once setup can be used to access the system. The pitfalls of this is that the login system will not have a limit on the number or passwords and usernames entered meaning that an unauthorised person may guess the username and password and enter the system.

  2. Computer systems assignment 1

    an antivirus installation and it tells me to click "Next" to start the installation. In the next window it allows me to choose the installation type whether it is local installation or central installation.

  1. Infernowear is a new company run by a self-employed creative designer aiming to producing ...

    Data flow diagram: The DFD below shows how the new computerised system will take orders and how the data will flow through out the system starting with the customer placing an order and ending with the orders being shipped to the customer.

  2. The Global Positioning System

    This is more realistic, because the earth is not flat, and navigating around it as if it was would be unhelpful. Using three satellites brings us to another set of simultaneous equations, again using Pythagoras.

  1. Computing Project

    My system for a start will store the entire student details carefully and properly in line with all data protection acts. The main thing is that these details should not get lost and the instructor has access to this all the time so that he can contact the student at any time.

  2. AQA Computing CPT3

    This will stop the customer from re-using the pump again Replace Nozzle 'Replace Nozzle' This will make the customer interface idle, until the pump has been reset by cashier Reset Pump 'Reset Pump' This will reset the current pumps transaction to 0.

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