Number of E-Rikshaws in Kolkata
Case Statement:
Guesstimate the total number of e-rickshaws in Kolkata
C: Sure. By E- Rickshaws we are referring to the typical totos that have become popular in some cities right.
I: Yes. You can imagine the usual cycle rickshaw. However, this will not be a 2-seater but a 4-seater and driven by an electric motor.
C: Alright. I’d like to go by the population approach. Considering the population of Kolkata to be around 50 lakhs. Will that be a fair start?
Okay. Go on.
C: Then I would split the population by the income in the high, medium, low categories with a 20%, 50%, 30% split respectively. In the middle-income category 50% would use public transport and in the low income 60% would use public transport. Thereof, 20% and 10% respectively might go for E- Rickshaws. Next, I’d look into the number of rides and try to arrive at a figure. I’d request you to let me know if I am missing something.
I: Don’t you think the approach is a bit linear. You can try to consider factors like the demand for this vehicle.
C: Sure. In that case, the population density can be factored in. May I proceed by taking an area of 200 km2.
I: Sure.
C: (Obtained the population density) I’d assume a larger chink to be crowded in the city so roughly 60% of the 200 km2 will be crowded and will have e – rickshaws at full capacity while the non crowded places will see roughly 3 passengers on an average. Then I would take a horizontal 10 rides per rickshaw per day assumption and calculate.
I: So what is the final number?
C: (After a calculation break) I’m getting a figure of roughly 7,500 E- rickshaws in the city.
I: Alright. That will be all. We may close now. Thank You.
C: Sure. Thank you so much.
Background Information
E – Rickshaw: Typical tuk–tuks (totos) seen in cities these days.
New replacement for cycle rickshaws in the city.
Cycle rickshaws are 2 seater and pedal-driven or hand pulled.
E rickshaws are 4 seater and driver by electric motor.
3000 + 2500 + 1100 + 900 = 7500 E-Rikshaws
Case Tips
Include the crowding factor.
No of rides / demand will be higher in areas with higher population density.
Include multiple factors and make it comprehensive (not a linear approach).
Basic BQs ( tell me about yourself and why is consulting of interest).