FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Other than Parallel Running, there are direct changeover, phased implementation and pilot running. Direct changeover is when the old system is completely removed and immediately replaced by the new system.

Detailed explanation-2: -The Implementation Methodology is broken into five stages: Prepare, Plan, Design, Validate, and Deploy. Each stage includes a series of segments that are filled with a set of inputs, tools, techniques, and deliverables all building upon one another to move to the next stage.

Detailed explanation-3: -There are three main methods used: phased implementation, direct changeover and parallel running. Phased implementation: A staged method whereby one part of the overall system that needs changing is changed. If any problems arise, they are limited in scope and therefore non-critical.

Detailed explanation-4: -Direct Changeover The old system is stopped completely, and the new system is started. All of the data that used to be input into the old system, now goes into the new one. Sometimes a direct changeover is the only way to implement a new system.