676743
Descrição
Mapa Mental por Lauren Pickett, atualizado more than 1 year ago
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Criado por Lauren Pickett
quase 11 anos atrás
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|
Capabilities and limitations of ICT
- Advantages of ICT over
manual systems:
- Speed of the
processing
inculding
faster
searches.
- Repetitive
processing
done to
consistent
standard.
- Savings
on
storage.
- Ease of
updating
data.
- Accuracy &
speed of data
communication.
- Speed of the
processing
inculding
faster
searches.
- Factors affectomg efficiency of data
processing:
- Suitability
of
software
for the
task.
- Ease of use
of software
and HCI.
- Compatibilty
with other
hardware
and software
systems.
- Suitability
of
software
for the
task.
- What could cause problems?
- Changes in
requirments
during the
implemtation
- Insufficent
testing a
system may
crash when
unexpected
input is
recieved.
- Poor maintence prodedures.
- Changes in
requirments
during the
implemtation
- Maintence procedure:
- Perfective maintenance -
Documentation kept up to date,
Continual improvement of the system.
- Adaptive maintence: It may
need to expand in some
areas, add new development.
- Corrective
maintenace - Errors
which have been
corrected e.g. wrong
headers.
- Perfective maintenance -
Documentation kept up to date,
Continual improvement of the system.
- Factors affecting the
efficency of data processing
systems:
- Hardware: The more RAM avaliable
the more program instructions &
data can be held and speeds up
processing.
- Input GIGO : this
shows that the
output info is
dependent on the
accuracy of the
input data.
- Software: Errors and bugs are
caused due to poor software which
can cause the computer to crash
unexpectdally and some cases lose
work.
- Communication: People in an organisation
who will be involved in working with a new
system should be consulted in its
development there must be sufficent
communcation between the developers and
users of the system through all stages.
- Operating system:
OS need to be up to
date for new system
software if it is not up
to date it may not be
capable of running
the new system and
vice versa.
- Hardware: The more RAM avaliable
the more program instructions &
data can be held and speeds up
processing.
- How to avoid post implemenation costs?
- Make sure your initial
systems analysis was
thorough and you have
identified all the data
flows and stores fully
understand what the
user wants.
- A detailed design
is needed before
the
implemenantion
which should be
agreed by the user.
- Consult with unions
to avoid strikes and
delays.
- Make sure your initial
systems analysis was
thorough and you have
identified all the data
flows and stores fully
understand what the
user wants.
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