sequenceDiagram participant D as Director participant P as Producer participant C as Full Crew participant G1 as Group 1 participant G2 as Group 2 participant M as Milestones Note over D,M: Week 1 D->>C: Pitch Story D->>M: Treatment Note over D,M: Week 2-3 G1->>M: Previs A G2->>M: Previs B Note over D,M: Week 4-7 loop Refinement D->>G1: Previs G1->>M: Previs P->>G2: Techvis G2->>M: Techvis end Note over D,M: Week 8-11 loop Refinement D->>G1: Previs G1->>M: Previs P->>G2: Techvis G2->>M: Techvis end Note over D,M: Week 12-14 D->>M: Final Production P->>M: Final Production C->>M: Final Production