Method for operating a brake system for motor vehicles, comprising a plurality of wheel brakes (8, 9, 10, 11) for which wheel-individual nominal pressures (p
n
soll ) are specified, an electrically controllable pressure supply device (5), which can provide a brake system pressure for actuating the wheel brakes (8-11), wherein the brake system pressure (P) provided by the pressure supply device (5) can be determined, and further comprising an electrically controllable inlet valve (6a-6d) and an electrically controllable outlet valve (7a-7d) per wheel brake for adjusting wheel-individual brake pressures (p
n
R ). At least one outlet valve (7a-7d) is analogized or analog-controlled and is controlled by means of an electric control variable (I
n ), wherein at least one valve-specific control characteristic (I
Ö (p
R ), I
S (p
R ), Q(I, p
R )) and/or a valve-specific parameter (Q
min , ṗ
min , Δt
Ö ) is determined for the analogized or analog-controlled outlet valve (7a) by means of the brake system, and wherein the analogized or analog-controlled outlet valve (7a) is controlled as a function of the valve-specific control characteristic and/or the valve-specific parameter for the degradation of the brake pressure (p
R ) in the wheel brake (8) associated with the outlet valve (7a). The invention also relates to a brake system.