Predictive analysis ability to add another dimension for time series forecasting

What is the problem or goal the end user is trying to solve or accomplish?

Ability to add another dimension in the same table(or another referential table) as a dependent variable for the time series forecasting.

How are they solving it currently?

No workaround

What is the recommended solution by the Customer?

Ability to add another dimension in the same table(or another referential table) as a dependent variable for the time series forecasting.