As you probably are aware, the IES2008 format allows for a relatively large number of papers to be presented within a short period of time. The papers are restricted to 15 minutes (nominally). With discretion, your session chairpersons may enable somewhat longer presentations, if there are no-shows and/or if some incursion into the break intervals seems appropriate. Therefore it is important for authors to go through their oral remarks carefully, timing them to be several minutes less than 15 to allow for transition from one speaker to the next, a few questions, etc. Since, in most cases, the full papers are available to the audience, a full exposition is not very critical anyway. Therefore it would be wise to stress the main points made in the paper and not dwell on details. Please time your talk, taking into account that times moves faster when you are in front of a live audience.
Thanks for your consideration,
John Goodman
P.S. Leo McNamara had some excellent ideas that I append below:
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1. Paper title, authors, affiliations
2. Summary of main points.
3. Future directions
4. Assumptions, restrictions, caveats, reason for work
5. Sample observations
6. Conclusion (e.g., errors, differences from before, new features)
The main point is that the number of slides should be restricted. Two minutes per slide x 6 = 12 minutes, a good time to wrap up and endure a question or two.