Multiple co-equal protagonists instead of one central lead — Altman, Safdie, Kusama master this. No hierarchy between characters; each carries narrative weight.
You need multiple stories running concurrently without one dominating the others — that's the technical challenge in an ensemble film. Not one main character carries the film, but four, five, sometimes ten characters, each with their own motivations, conflicts, and weight. The director must constantly redistribute focus without the audience feeling that one story is being shortchanged on screen time. This only works if you conceive of the dramaturgy as a web, not a line.
On set, this means: You don't plan shooting days according to classic plot chronology, but according to character clusters. A scene with character A and B is shot, even though it occurs chronologically later, because the actor is available that week. This requires precise continuity management and editing planning from the outset. Location management becomes more complex — you often need parallel settings so that multiple unit teams can work simultaneously. Classic master-scene dramaturgy only works to a limited extent here; instead, you work with isolated, telling details (faces, hands, glances) that you combine later.
In the edit, an ensemble film is constant calibration. Each scene must have its own independent energy but must not become dominant. The rhythm doesn't arise from a main plot pushing forward, but from the oscillation between narrative threads — similar to cross-cutting, but on a larger temporal scale. Some directors (Altman was a master here) work with overlapping dialogue, where multiple characters speak simultaneously, and the sound mix becomes visually equitable. This makes sound design a dramaturgical tool, not an illustration.
Practically: When planning an ensemble film, you need a visual strategy that keeps all characters identifiable. This can work through color coding (each story gets a specific palette), through locations, or through rhythmic editing patterns. Without this formal clarity, your ensemble fabric quickly becomes confusing. The audience must unconsciously understand that there is no hierarchy here — your visual language must prove this, not the dialogue.