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System Development and Analysis (Understand that a computer system…
System Development and Analysis
Explain the main factors affecting system
development: the user needs, time and cost
Cost
Old system support may be very expensive
The current system may also be too
inflexible or expensive to maintain
User Needs
Technological developments could also make the
current system outdated or redundant.
User needs may have changed so the software needs to be updated
Advances in hardware and operating systems may also necessitate a new system
Time
The system may have to be developed within a time period the analyst should give extra time in the case of hiccups as they always happen
Explain the need for software systems which meet
the needs of organisations and/or individuals
Organisations and individuals demand software to
solve problems.
In most cases software is bought as generic packages and tailored to meets the user needs such as Microsoft Office 365.
Rather than each organisation developing their own software it would save on development time and costs to purchase a payroll software package “off-the-shelf”
Understand that a computer system consists of a
user interface, processes and data
UI allows the user to interact with the computer and the software.
User interface which allows data to be entered, which is processed and outputs the results.
A process typically will take data in the form of raw facts and figures and product information typically in the form of reports.
A process carried out as part of a computer system.
Explain the impact of the ‘software crisis
Projects were
Over budget
Were delivered late
Did not meet the user’s needs
The software was very inefficient
The software crisis was created when the hardware development was growing at a much faster pace than software developments
Describe the roles of the following during system
System Development and Analysis