¶ 34 To put it another way, "the concern" in a probation revocation hearing "is whether the alternatives to incarceration which have been made available to a defendant remain viable for him." People ex rel. Gallagher v. Dist. Court , 196 Colo. 499, 502, 591 P.2d 1015, 1017 (1978). "[A] probation revocation order operates not as a determination of guilt or innocence as to the question of whether the defendant violated the terms of his probation, but primarily as a reassessment of the correctness of the original sentence."