Because the diagram is large, please view it here:
http://www.gliffy.com/publish/1323750/
Cells in blue are optional steps that do not need to be performed for the task to proceed.
Cells in red represent complex tasks which will require a separate HTA.
Cells in green represent steps that are executed multiple times within a task.
Cells in yellow represent conditional steps that may or may not be possible depending on choices in previous steps. A rounded orangle rectangle beside the cell explains what the conditions are.
"Or" cells represent steps that exclude each other -- only one or the other step is performed for the task/subtask to be complete.
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