Discuss the different methods of implementing a new database in an organization. What are the benefits and draw backs to each method?

What will be an ideal response?

In a cold turkey implementation, the new system is deployed all at once as a replacement for the older system. This creates a quick change to the new system and potentially reduces costs as only one system is in use at a given time. However, if the new system contains faults, there will not be an alternate system in place as a workaround.
In a piloted implementation, small groups begin using the new system first. Once the system is perfected, additional groups begin using the new system until it is fully implemented. In the event of an error in the new system, the number of users affected is small. This implementation style requires at least two systems to be in use at the same time and increases the time to full implementation of the new system.
In a parallel implementation, the full system is deployed concurrently with the older system that it is replacing. This provides redundancy in that, if the new system contains errors, the older system can serve as a backup. Conversely, managing two complete systems at the same time can be costly.
In a phased implementation, the new system is deployed in small pieces. This allows each piece to be perfected before the next piece is deployed. This process can increase the time of a full implementation and requires the old system to be running concurrently with the new implementation.