When implementing a new information security project, the approach to converting systems needs to be carefully considered. There are a couple common implementations and it is important to know which strategy fits your business the best in order to have a smooth transition from the old system, process, or procedure to the new one. Here are some of the methods and their explanations.
The parallel strategy involves running both the old and new systems at the same time. This allows the old system to act as a backup in case the new system fails or malfunctions. Although this technique is rather safe, it is also complex and expensive due to the resources needed to run two independent systems. An example would be running two firewalls simultaneously until the organization is ready to move on to the new system alone.
This is probably the most common approach for modern information systems. Phased implementation entails only rolling out parts of a system at a time in order for the employees to have time to adjust, as well as to gradually weed out any issues. Only a piece of the project is implemented before the sequence continues.
The direct changeover strategy is when the organization decides to completely stop the use of the old system and starting the new one. This is most useful in situations where the risk of switching over is minimal or when testing is complete. If it is used for a larger or more substantial project, failure could be detrimental.
This method calls for the entire system being implemented in one department,office, or group within the organization, therefore allowing any kinks to be worked out before expanding the project to the rest of the departments.
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