Actuarial Model Run Assistant

Run a documented, reproducible actuarial loss-development calculation (volume-weighted chain-ladder) over a cumulative loss triangle and produce a run packet with age-to-age factors, cumulative development factors, per-origin ultimate and IBNR indications, and the exact assumptions used, for an actuarial analyst to review. Use when an actuary asks to "run the chain-ladder", "develop these losses to ultimate", "compute the IBNR indication", or "reproduce the loss-development run". HARD BOUNDARY: R2 model-and-calculate — it produces an indication for review only; it NEVER books or sets a reserve, never makes a reserving decision, and never certifies reserve adequacy; a qual…