It depends on the inmate. All of the inmates have a program designed for them. Once they complete it to the satisfaction of the overseeing staff, they will work their sentence down at the next designation.
https://www.inmateaid.com/ask-the-inmate/how-long-does-a-prisoner-stay-in-deuel-vocational-institution-dvi-before-he-is-sent#answer
Accepted Answer Date Created: April 23,2016