Consistent Message/Multiple Contributors
Many presentations are produced by multiple contributors.
After the storyline has been developed, sections of the presentation are assigned for production to smaller groups or individuals within the team according to their area(s) of expertise. Each completed section is then added to the presentation. This is a very efficient way to develop a presentation with high-quality content.
What many teams fail consider and address, however, are the different presentation and writing styles of the various contributors. The presentation does not have "one voice" or "one face."
Toward the end of the production process, time must be allocated to edit the narrative and chart formats into a consistent style. This means a imposing consistent tense, use of terms, and structure, etc.
Backward schedule from the deadline and assign interim deadlines. Leave enough time at the end of the process to include this important step.