I'm not familiar with this particular developer, but a reasonably exhaustive info sheet for it can be found at the Ilford UK website:(posted 8081 days ago)http://www.ilford.com/html/us_english/bw.html
Note that there is Ilfotec DD and Ilfotech DD-X. I had a quick look at the former, and it does have a page in the PDF about processsing specific films at stated Exposure Indices. It was a couple of pages in.