Well, it is clearly visible that its not having that much demand, but 15022 has good demand from BSB to TATA. But 15021 has not that much demand, because it is following 12875 and time difference is of around 4hrs. Even if it is focused in POV for BSB, - either its day should be changed, or increase frequency or can be transferred to SER for having any other day Departure/Arrival