Thread:Mesektet/@comment-3581997-20160615160106/@comment-3581997-20170805070030

Mangas are done by a single artist most of the time. Unlike western comics, which can hire on more people, co-writers, new artists so forth, most mangas are the work of one writer and one artist and some times those are both done by one person. Because of this, mangas are done when the writer/artist is ready. Some mangas are like newspaper comics and just written panel by panel then collected later by the publisher and released as an issue, but most active writers/artists have quotas to meet and do indeed release them by the issue. The active time between those issues can vary wildly often due to how the writer/artist is getting along with the publisher.

Akira Toriyama for example would jerk his releases around solely to put pressure on his publishers if they got too pushy with him, because at the end of the day no one else could write/draw Dragonball and he did not take kindly to people giving him non-constructive criticism.

Yoshihiro Togashi stopped writing/drawing Yu Yu Hakusho because he felt the demand of each new issue was starting to drain his creativity.

Togashi's wife, Naoko Takeuchi, originally wrote on her scheduel but was given weekly quotas when Sailor Moon was picked up by a publisher.

Most famously Tite Kubo stopped writing Bleach because readers stopped liking the plots and characters which Kubo had long since given up on putting creative effort into in order to please his publisher's quotas and marketing.

So the precise work may be run in a variety of ways. Generally publishers try to keep things coming out on a reliable time table but since it comes down to one person keeping the project going on the creative end, the spacing between one issue and another is very much a matter of what is going on behind the scenes between the writer/artists and publishing representatives. This is to say nothing of things like translation or distribution.