I use effectiveness for "does it do what it is supposed to do" and efficiency for "how much time / how many resources does it consume for doing what it does", but there are probably other definitions, always nice to have many to chose from 8-).
BTW I edited my comment after you replied, naughty of me, but I hadn't seen your reply yet.
no problem. I see what you mean
BTW Have you in any way responded to this reply to one of your articles? If you have, I'm going to read your responses, if not, not.
yeah..give me a second. i can't keep up lately