A workflow scheme consists of steps and transitions.
A step represents a workflow's current status for an item. An item can exist in one step only at any point in time. Each workflow step corresponds to a linked status. Each status can be used in multiple steps or in different workflows.
There are three different types of steps:

• Start — the starting point of any workflow, where you start working on a work item.
• Intermediate — the number of intermediate steps is not limited.
• End — the end point of a workflow.

A transition connects two workflow steps thus allowing a work item to move from one step to the next.