You need to implement the aggregation designs for the cube. What should you do?

The CREATE CACHE statement pre-loads dimension data into memory for faster dimension queries but does not design or create measure aggregations.

The Aggregation Design Wizard guides you through selecting which dimension attribute combinations to pre-aggregate in an SSAS multidimensional cube, balancing storage cost against query performance gains. It uses a performance goal slider or explicit design options to generate an aggregation design that SSAS uses to answer MDX queries without scanning full fact data.

Relational indexes optimize queries against the underlying source tables in the relational database, not the aggregations within the SSAS cube itself.

The Usage-Based Optimization Wizard tunes an existing aggregation design by analyzing logged query workloads - it requires an existing design and query log, making it unsuitable for initial aggregation design.