How to set order for the plugins which share common trigger event in CRM 2011

          When we use plugins in MS Dynamics CRM, sometimes we may need to use more than one plugins with common trigger event. In order to handle this scenario, we have a property in Plugin Registration tool. Its called 'Execution Order'. So the plugins which share same trigger event could be assigned with a Execution order. Execution Order numbering starts from one. Even if all the plugins share the common trigger event, the Plugin with Execution order 1 would be executed first and then the rest. Hence we could decide this order according to our requirement.
For Instance,
Imagine that we have two plugins
1.Plugin : AssignOwner
2.Plugin : Calc
Both of these must be fired when we create a contact and also as Pre-Operational.
But as per our requirement we decide that Plugin 'Assign Owner' should be executed first and then 'Calc'
So it could be done while defining the step.