Update of the Indian Ocean swordfish operating model

This document presents the current status of development of an Operating Model for the Indian Ocean swordfish
(Xiphias gladius) stock, with the re-condition of the models to the most recent sworsfish stock assessment, conducted
in 2020. It explores the role of 9 axis of structural uncertainty, each with 2 to 3 levels. The current grid results in
2592 alternative population trajectories and productivity estimates. To reduce the number of model runs, a partial
factorial design of 108 model runs is proposed. A set of diagnostics are then applied, and currently a set of 70 models
is considered to compose the OM.