Hi rizmustafa,
While you do not necessarily need your wife's ECA to be able to create your own profile (and become part of the pool) with you as the primary applicant, it certainly does help the score if you are able to get one.
Essentially, when creating the Express Entry profile, the form asks you to fill out both a.) If your wife has a post secondary degree & b.) If the Non-Canadian post-seondary degree has an ECA. If you answer 'Yes' to the second, then it will further ask you for the ECA reference number, thus you need to have the ECA before you answer a 'Yes' to the second question.
Personally, I just created my profile and submitted it to be part of the pool recently. My spouse got the ECA after my application became part of the pool, so I went in and edited my application to indicate the updated ECA details (I answered No to the first question earlier, and after geeting the ECA, went in and edited the profile to say 'Yes' for the second question).
I myself am expecting that the CRS score will go up by 8 points, I know which may not be a lot, but can also be a deciding difference sometimes.
One thing to note, is, if you make edits to your profile, it may take up to 1 full business day for your score to get updated (eg. I updated my profile Friday night and am expecting my score to get updated Monday night, i.e. Sat & Sun not counted).
Hope that helps (thumbs up if it did
)
-S.