Yes you got it
Example: Your 15 RM = 100, 10 RM = 125, 5 RM = 150.
6-weeks would look like this:
--------15----------|-----------10---------------|-------------5-------------|
75,80,85,90,95,100|100,105,110,115,120,125|125,130,135,140,145,150|
Here's a couple links from FAQ to help...