Is there an industry standard for how many customers typically zero out of an IVR; and at what point customers zeroing out is an indicator that your IVR is not effective? If a quarter of your customers are zeroing out at some level, is an IVR worth i

Is there an industry standard for how many customers typically zero out of an IVR; and at what point customers zeroing out is an indicator that your IVR is not effective? If a quarter of your customers are zeroing out at some level, is an IVR worth it?