Stands are frequently employed when complex lighting or camera movements require time-consuming adjustments, ensuring that valuable production time is not wasted waiting for the main actors. They assist the filmmakers by allowing them to meticulously refine the technical aspects of the scene without requiring the involvement of the principal actors.
Additionally, stands can be useful in situations where the principal actors are unavailable for certain shots, such as when they are involved in other parts of the production or need rest. For instance, a stand might substitute for an actor when shooting long shots or sequences that do not require the actor to deliver lines or engage in significant acting.
In essence, a stand is a valuable asset on a film set. By providing a temporary substitute for the principal actors, they contribute to efficient and effective filmmaking by allowing the crew to prepare the scene without wasting valuable shooting time.