During the production stage of your projects make sure you have a list of the materials you will need to create or collect for your project.
For example, props for your characters, costumes, props for the set for your documentary. Or maybe pictures either found online, that you need scan, or you need to collect from someone else. Make sure you have DRI's for these responsibilities so the director can focus on the vision of the project and the DRI for this part of the project can focus on collecting/creating assets.
TIP: Have one list for the items you need to create and another for the items you need to collect. As the DRI goes creating/collecting have them check off the items to show progress.