Workflow vs Execution Plan

[Rincy]

Recently i went through execution plans, fulfillment groups and workflows and i got confused.
In the demo site https://demo02.service-now.com/ , For the catalog item "Executive Desktop" the execution plan associated is the "PC Delivery Plan". The same catalog item is associated to two workflows - "Service Catalog Request" and "Service Catalog Item Request".
Service Catalog Request sends to approval group if the price is >1000$ and then associates with "Service Catalog Request Item".
Could you please help with answer for my question - Why do we associate the catalog item with Execution Plans and also workflows. How can a catalog item have two workflows. How does it know which one to start first ?

[NeilH2]

I don't know how it divides the time it may do it based on the number of tasks in the workflow.
I believe it recalculates the time when each task is closed.

As i said I'm not using this function yet this is just what i picked up.

[NeilH2]

The whole time (target date) for the request item is set to 10 days

As i said I'm not sure on the task points but i think - if you dont specify a time on a task then the target dates on any new task is recalulated to fit in with the workflow time.

If a workflow has a target date/expected time of 10 days and 2 tasks. If task 1 took 6 days, then Task 2 should have its target date calulated to 4 days.

It depends which method works bets for you.

Check here for the full workflow overview: http://wiki.servicenow.com/index.php?title=Workflow_Overview

http://wiki.servicenow.com/index.php?title=Defining_a_Service_Catalog_Workflow

Once you get into them they are very simple and very powerful.