Why do you think IS/IT systems fails?

as the question goes "why do you think?", ill give my opinion.

for me there are some factors that can affect an IS and create failures in the system. some common personal failures can also be a major failure for the IS.

* mechanical and technical problem - if ever a company is undergoing a transaction and the physical system fails, the transaction will be interrupted, not unless there is another system that monitors the transactions and duplicates the task at the same time.

* failure to monitor transactions and tasks - an IS needs to be checked if it still is undergoing the proper procedures, if not, the basis or the backbone of the system will be violated resulting to unwanted outcome of the procedure.

* weak system security - an IS needs to be secured in order for it to undergo the right procedures of the system, if anything can permeate the system due to lack of security, the system may experience malfunction.

* failure to update the system - the IS needs to be checked if it is still able to manipulate the system along with the updates of an institution. if not, the company will not be able to dynamically step-on forward with there task. they will not be able to work continuously using there very own IS.

* human error/negligence in applying IS - the IS will be affected if even one of the participants in the system commits an error in implementing the given system. it is always important to orient the people under the system about the flow of the procedure to prevent human error.