Those are 90-day metrics, and they are evaluated on the 20th of each month and then you need to evaluate at that level or better for another month. Then on the 1st of the following month, you should get a change.
Example: You get evaluated on Sept 20th and have shown improvement. You must maintain that level of metrics or above until Oct 20th when you will be evaluated again. If that one looks good, you should see any due changes on Nov 1.