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FYP Final Report v1.0.0
Copyright and All Rights Reserved To: Pee-Lo Team @2003/04
14
For management purposes, we can group all data in one area, say all patients’ x-ray data is stored
in Site A and all patients’ personal data is stored in Site B. The drawback comes when one of
these sites break down, the whole network breaks down. It is recommended to have the patients’
database localized to the first site he visited in the past and updates are done in the current site
where the patient is geographically at. Security of site is enhanced and availability of data is
greatly upheld in such implementation.
But such method is very hard to implement if we are to use today’s technique of how database is
managed. Ease of management and site security do not make good couple if married. A new set
of solution has to be devised to meet such a challenge.
2.2.3 Accessibility of Data
In a WAN implementation, data within the organization is available to all the staffs of the
organization for as long as the staffs have some access to the WAN in general. They can use
Virtual Private Network (VPN) if they are out of the coverage of the WAN. They can resort to the
use of GPRS if they are at a very remote place.
Now, there does not seem to have any issue of accessing the data up to now but consider this:
“How these data are is accessed?” Many a time these data is accessed using a desktop computer
or laptop if the employee is at an off site environment without the WAN influence. This means that
data can only be accessed with a certain device.
Many a time, we do not bring laptops or bulky equipment with us all the time. A physician is not
expected to bring a laptop everywhere he goes since that laptop could hinder his mobility. He
might prefer bringing something small – a ‘laptop replacement’ perhaps. He decides to bring a
small personal digital assistance (PDA).
PDA is a mobile devices and it is a new trend by the current standard. Programming PDA is a
rather new thing. PDA’s architecture is very different to that of a laptop or desktop. It has smaller
screen and no keypad for keystrokes. From just one glance, most of us will think that this is a bad
replacement for a laptop and thus conclude that to access these data I have either need to have a
laptop or a desktop.
To make the assumption that one needs a laptop or a desktop to access one’s enterprise database
is a myth by today’s standard. PDA, though small, they are as powerful as a laptop or desktop
given proper software or design. Implementation of PDA as a ‘laptop replacement’ has make data
accessible anywhere; the true concept of mobile workers.
Accessibility of data is all about ways of how user accesses data using any devices regardless of
users’ location. This is easier be said than done when we consider that each devices run on
different platforms and operating systems.
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