Approach to move Teradata data to BW using BODS

Hi Folks,

I am working on an interface to move 3 Dimension table and one Fact table from Teradata to BW using BODS 4.2 and need your valuable inputs for following:

1.) Is it fine to have only one Workflow which includes all these 4 tables or we should use two Workflows each one for Dim tables and Fact table and then join them?

2.) What transformation type(like Query transform) shall we use to move data from these four tables  to target Template table?

3.) What Validations can we include the design?

4.) Do we need Error handling (Try and Catch) in the design as these tables are related to Master data.

You prompt response is appreciated.

Regards

Jitin Khanna