There are some disadvantages of software based components
engineering.
Time and effort required for component development:
Among the factors that can weaken development available components
are the increased time and effort needed, the construction of an available unit
takes 3-5 times the effort required to build a unit for a specific purpose.
Unclear and ambiguous requirements:
Reused components can be
used differently by definition applications, some of them may not know it yet
needs that cannot be predicted. It applies to both functional and
non-functional.
Maintenance costs of components:
Maintenance of components the costs can be very high for the reason
that the components have to be responded to the different requirements of
different applications that are running different environments, with different
consistency and perhaps require a different level of sustainability support.
Reliability and sensitivity changes:
As components and applications have different life cycles and
different requirements, there is some hazard that a component does not fully
meet the application requirements or that it is possible include unrecognized
functions that are not known in the application developers. When introducing
changes at the application level, there is a risk that the change that has been
introduced will result in the system failure.
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