Waiting times. Intending authors should be aware that an accepted article does not immediately go to online publication. Every article published undergoes a detailed editing by the Journal. This means that there is a delay between acceptance and online publication. There is then a shorter delay to hard-copy publication.
The current wait from acceptance to editing by the journal and online publication is about 9 months. By the end of December 2018, all articles accepted during 2017 had been edited and almost all have been published online. In addition, a number of papers accepted in 2018 have also been edited and published (mostly as articles in special issues).
Update: In mid-August 2019, only two papers accepted in 2018 await editing.