Required reviews completed vs ready for decision elsevier In elsevier journal publication process, what is the difference between "required reviews completed" and "ready for decision"?
From the outside, it's difficult to tell. Two possibilities that spring to mind are:


The journal requires two reviews, but regularly invites four (this makes sense because reviewers decline to review, never respond to the invitation, agree but don't submit a review by the deadline, etc). Two of the reviewers have completed their reviews, but as long as there's a reviewer who did not explicitly decline still invited, the status remains as "required reviews complete". However if all the reviewers have either submitted a review or have declined to review, then the status updates to "ready for decision".
The journal is set up so that the handling editor makes a recommendation which is then forwarded to the associate editor/editor-in-chief to make a decision. "Required reviews complete" would indicate that the handling editor hasn't made a recommendation, while "ready for decision" means (s)he has.


Either way there's nothing to do except wait.