I would create a controller a package, and use Execute Package Tasks to call the existing worker packages. Do not constrain the Execute Package tasks and they will execute in parallel.
|||I didn't get it.My question is how to run different packages sequentially or parallely. e.g I am loading customer dimension in one data flow(one package). Then I am loading parts dimension using one more package. Then I am loading Calendar Dimension using another package. How do I combine these in a single process flow/workflow, so that one flow can run after/with another .|||You haven't given any details of the workflow you want, so I'll just guess. If I have two dimension load packages and one fact load package I would load my dimensions in parallel, but would want my facts to load after all dimensions for example.
So I would create a new package, the controller package, and add an Execute Package Task to call my Dim 1 package. Then add a second Execute Package Task for my Dim 2 package. Then add a third Execute package task for my Fact package. Now drag and drop the workflow (green dangling lines) from the Dim 1 Exec Pkg Task to Fact Exec Pkg task. Repeat for Dim 2 to Fact.
So now the dimensions are unconstrained and will execute in parallel, but the fact will wait for both dimensions to complete successfully.
Dim1Fact
Dim2||||Thanks DarrenSQLIS, I got it|||The execute package task is working. but when I run my sequence container, which contains 3-4 execute package tasks--it opens up each and every pacakge on my screen (while running). what do I need to do, if I don't want to open them. I want to execute this sequence, without opening up each and every package..|||That's just what the debugger does. If you run it with dtexec (Ctrl-F5) that won't happen. But then you won't get them purty colors. 
