If your paper is accepted for publication after peer review, your article will be prepared for publication and can appear online within 5-6 weeks.
If you are publishing your research in an open access, continuous publication journal you will not need to wait for your article to be assigned to an issue. With no page count constraints, your article will be published online in a fully citable form with a DOI number as soon as it has completed the production process. At this time it will be completely free to view and download for all.
Please note that delays occur due to an unpaid article processing charge (APC), filling out the required forms, or approving proofs in a timely manner.