Untitled - Ministerstwo Rozwoju Regionalnego

connections can be made 5 . System breakdowns resulting in lack of access to the
system, often lead to high losses for customers, therefore it is important to establish,
together with the customers, two basic parameters in this respect:
1. which systems are of critical importance for the customers and their market
competitiveness;
2. the period of time after which the system must recover after a possible
breakdown.
In fact, having the shortest possible system recovery time following a breakdown
is not necessarily worth the very high costs such approach entails. The
time period should be properly balanced between possible loss level (lost opportunity
costs) and the costs necessary for system recovery.
Confidentiality means securing the information against unauthorized access,
both form the outside and inside of the company. In well protected systems
there are appropriate procedures which clearly state who (level of job position)
has access to specific information. At the same time, it is also necessary to
separate access to information from the possibility of editing it.
System integrity is connected with lack of conflicts between interconnected
sub-systems. As has previously been stated, very often companies have a set of
cooperative systems dedicated to specific company functions. If disruptions connected
with interchanging data appear as early as the sub-systems level, the risk
of their emergence at the level of integration with customer systems (usually
a few) is definitely greater.
9.5. Bibliography
1. Fricke M., Information Logistics in Supply Chain Networks. Concept, Empirical Analysis,
and Design. ibidem-Verlag, Jessica Haunschild u Christian Schon 2004.
5 In the main processing unit all equipment elements are backed up and the entire configuration does not
have a definite identifiable point of breakdown. For instance, breakdown of a single disk or damaged disk replacement
do not interfere with the continuity of matrix,and servers housing database and application work in
a cluster configuration, thus breakdown of a single server has no effect on operating continuity of production
systems. Malfunction of any network device results in its function being automatically taken over by a back-up
device, processing centre is equipped with a high capacity UPS and an automatic diesel powered generator. The
above configuration protects against hardware problems in a processing centre. In the event of damage done not
only to the hardware or when other problems with the CPU appear, its function is taken over by a back-up unit.
The time needed to start the back-up unit does not exceed one hour. Such a high degree of system availability
may be obtained through constant standby status of the hardware and the software of the back-up unit (so called
'hot backup'), data replication carried out every few minutes from the main unit to the back-up and short time of
reconfiguring the entire WAN network (based on PBI Schenker Ltd.)
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