How do they decide who gets a personal bond?

Before the pandemic, there was a lengthy and complicated calculation to determine who was likely to show back up for court. For example, they were likely to give someone a personal bond if they had a job, lived in Travis County, and didn’t have too many prior arrests. Because of the virus, they are offering personal bonds much more freely. However, there are some situations (and types of cases) that they are not giving personal bonds.