A system comprising: a memory configured to store a relationship between a plurality of stimulation parameters, wherein values of the plurality of stimulation parameters are selectable to at least partially define electrical stimulation deliverable to a patient; and processing circuitry configured to: control a medical device to deliver a first electrical stimulation according to a first value of a first stimulation parameter of the plurality of stimulation parameters and a first value of a second stimulation parameter of the plurality of stimulation parameters; receive an input representative of an efficacy of the first electrical stimulation delivered to the patient according to the first value of the first stimulation parameter and the first value of the second parameter; select, based on the input and the relationship between the plurality of stimulation parameters, a second value of at least one of the first stimulation parameter or the second stimulation parameter; and control the medical device to deliver a second electrical stimulation according to the second value of the at least one of the first stimulation parameter or the second stimulation parameter, characterized in that the stored relationship defines changes to respective values of at least one stimulation parameter of the plurality of stimulation parameters between a first zone, a second zone, and a third zone of stimulation intensity, wherein: the first zone comprises a pulse frequency range between approximately 10 hertz (Hz) and approximately 1 kilohertz (kHz) and a pulse width range between approximately 0.01 millisecond (ms) and approximately 0.1 ms; the second zone comprises a pulse frequency range between approximately 10 Hz and approximately 1 kHz and a pulse width range between approximately 0.1 ms and approximately 1.0 ms; and the third zone comprises a pulse frequency range between approximately 5 kHz and approximately 10 kHz and a pulse width range between approximately 0.01 ms and approximately 0.1 ms. a memory configured to store a relationship between a plurality of stimulation parameters, wherein values of the plurality of stimulation parameters are selectable to at least partially define electrical stimulation deliverable to a patient; and processing circuitry configured to: control a medical device to deliver a first electrical stimulation according to a first value of a first stimulation parameter of the plurality of stimulation parameters and a first value of a second stimulation parameter of the plurality of stimulation parameters; receive an input representative of an efficacy of the first electrical stimulation delivered to the patient according to the first value of the first stimulation parameter and the first value of the second parameter; select, based on the input and the relationship between the plurality of stimulation parameters, a second value of at least one of the first stimulation parameter or the second stimulation parameter; and control the medical device to deliver a second electrical stimulation according to the second value of the at least one of the first stimulation parameter or the second stimulation parameter, control a medical device to deliver a first electrical stimulation according to a first value of a first stimulation parameter of the plurality of stimulation parameters and a first value of a second stimulation parameter of the plurality of stimulation parameters; receive an input representative of an efficacy of the first electrical stimulation delivered to the patient according to the first value of the first stimulation parameter and the first value of the second parameter; select, based on the input and the relationship between the plurality of stimulation parameters, a second value of at least one of the first stimulation parameter or the second stimulation parameter; and control the medical device to deliver a second electrical stimulation according to the second value of the at least one of the first stimulation parameter or the second stimulation parameter, the first zone comprises a pulse frequency range between approximately 10 hertz (Hz) and approximately 1 kilohertz (kHz) and a pulse width range between approximately 0.01 millisecond (ms) and approximately 0.1 ms; the second zone comprises a pulse frequency range between approximately 10 Hz and approximately 1 kHz and a pulse width range between approximately 0.1 ms and approximately 1.0 ms; and the third zone comprises a pulse frequency range between approximately 5 kHz and approximately 10 kHz and a pulse width range between approximately 0.01 ms and approximately 0.1 ms.