How does the SAMHSA SOAR TA Center calculate average days to decision for SOAR-assisted SSI/SSDI applications?

When reporting data in our SOAR national outcomes, we calculate days to decision from the time the application is turned in to SSA until DDS makes a decision on the application.  The receipt from the Online Disability Benefit Application will show the date the application was received by SSA and the date on the notification letter from SSA can be used as the date of decision.