On the Woodworking show, when making flat stock, he uses the following
procedures.
1) sizes the stock on the table saw
2) joints one edge and one face on the jointer
3) with jointed face down planes the opposite face on the planer
4) passes the stock through the drum sander for final size

QUESTION? Why did he not simply go for final size in the planer? While I
am sure a drum sander would be a nice tool to have, is it necessary for the
above goal?

Thanks,
Ivan Vegvary