Being Effective V. Being Efficient

As some one who is new to the Lean and SS, I have a question.  Do you believe a process should be more effective or be more efficient?  I understand that the best of worlds would be a balance between the two, but we all know that is not always possible.

I believe that an effective process can lead to a more efficient process.  My reasoning is that effective process/procedures can lower defects and going over old ground again.

Being effective produces a desired result, where being efficient may get me where I want to be, but cause problems by sacrificing speed over quality.

Your thoughts?

J