The review process for a research paper can vary depending on the journal or conference, but generally it involves the following steps:

1. Initial screening: The editor or conference chairs will review the paper to ensure it is relevant and adheres to the submission guidelines. If it passes this initial screening, it will be sent for peer review.
2. Peer review: The paper will be sent to two or more experts in the field for review. These reviewers will provide feedback on the paper's strengths and weaknesses, as well as suggestions for revisions.
3. Reviewer feedback: The authors will receive feedback from the reviewers and will be given an opportunity to make revisions to the paper.
4. Final decision: After revisions have been made, the editor or conference chairs will make a final decision on whether to accept the paper for publication.

The time it takes to complete this process can vary, but it typically takes several months. It can take anywhere from a few weeks to a few months for the review process to be completed, depending on the journal or conference and the number of revisions required. Some conferences have a tight deadline for reviewing process, whereas some journals can take several months.

It's important to keep in mind that the review process is an important part of the scientific process and helps to ensure that the research is of high quality and is communicated clearly.