A child workflow process is a process that can be started by another workflow or dialog. If you want to apply the same logic in different workflows or in conditional branches, define that logic as a child workflow so you don’t have to replicate that logic manually in each workflow or conditional branch. This helps make your workflow easier to maintain. Instead of examining many workflows that may apply the same logic, you can just update one workflow. Read more
MSCRM With Ramandeep 