Vijaya Kittu Manda Good question. In general, the Editor will arrange the articles within a journal issue from what he/she perceives to be the most interesting down to the least interesting to the readers. Naturally, this perception is a rough estimate. In addition, any two articles which deal with a similar theme will be grouped together, to encourage readers to read the article before or the article after the one they are really interested in. Finally, any articles coming back very late from the referees may be added in at the end of the issue, so as not to impact too much on the existing index and the editorial. So as a reader, do not pay too much attention to the position in the issue.
I would say that if there is a survey paper published in a journal issue, then it is often placed first, as it is expected to have a larger audience - and it will also be described on the front page as such. For the rest of the issue, there are several possibilities: either the papers are grouped - roughly - by topic; or they are ordered based on the date in which the journal type-setting was done, and corrected by the authors.
Let me state my position respecting the publication order of my research. I for one do not give one damned about what publishers think. Heck, I do not even care what the reviewers think. I publish my material as I please, and most specifically for the express purpose of pleasing me.
The proceedings are often divided into thematic sections. Within each section papers go in an alphabetic order (by the author's family names). It may vary, however.