McKinsey & Company Interview Questions, Process, and Tips

Round: Case Study Interview
Experience: Case
Client is a philanthropic foundation with a corpus of $ X million. It wants to invest in India with a view to help curb AIDS spreading (Patient Care was ruled out). Help it decide: HOW + WHERE + HOW MUCH

Facts provided when asked:
- Estimate of population afflicted on a Pan India basis
- Main Source of infection was STD and hence for the purpose of the case I was to concentrate on this alone
- Estimate of segment sizes ( Sex Workers, Wives and Migrant Labor/Clients of Sex Workers) and the percentage afflicted
- Which Indian states is it concentrated in?
- What is the cost of a detection test?

Analysis
Stuck to the structure provided by the question of How, Where and How Much?

It was more of a discussion where I suggested different plans for 2 of the segments (Sex Workers and the Clients, Wives ignored as it was agreed that using protection after marriage was not acceptable by most men in this strata).

Testing in the ‘Sex Workers’ was to be shelved for the first part of the plan as the incremental benefits were small given that they had a very high percentage of affliction.

Suggested that the plan be rolled out 5 states to begin with and in areas having brothels near construction sites (migrant labor) and highways (truck drivers were a major part of the clientele)
How much?

To be tackled by setting milestones that the foundation set to achieve in terms of ‘slowing down spreading of AIDS’ in terms of spread after program introduced vs. spread with natural rate) using some publically available estimates of expenditure involved in such programs.
Tips: Take your time. Don't rush.

Round: Case Study Interview
Experience: Case
Client is a PSU Bank; savings account opening takes 60 mins.
(Entire Chain of Activities was given as an Exhibit with time and sequence involved) Reduce this to 15 mins.
It was a 10 mins case.

Analysis
1. Identify Critical Path
2. See which activities can be moved off/performed simultaneously/ performed by customer (perhaps at home)/performed beforehand (printing of cheque books)/performed by others (outsourced)
3. See which activities can be simplified, e.g. Form filling took 15 mins (It was a 15 page form, so simplify and shorten form)

NA: Why do we need the teller? Why can’t the officer do the work for the teller? (This would mean slashing off 6 mins of the process as the officer would not need to verify again)
Tips: Be honest in all your PI answers, as the inconsistencies are very apparent on the other side of the table even if you have rehearsed
your answers to perfection.

Round: Case Study Interview
Experience: Case
Client is a bank looking to set up a 100 ATM network or operate it on a contract. What would be your advice to the CEO?

Additional facts provided when asked: Real Estate + Machine + IT Network + Utility Costs on a monthly basis when owned and run by the bank as well as the annual management contract fee when outsourced.

Analysis
To study the differences in Costs between ‘Owned and run’ and
‘Outsourced’ (Owned and then leased out to different banks was not an option)
It was just a numbers case after the basic costs were identified, from the costs angle alone ‘Owned and Run’ was a better option.
Interviewer: Other than the compelling numbers, what might be the advantage of ‘owned and run’ over ‘outsourced’
Me: Maintenance and service levels can be controlled more effectively.
Interviewer: For what reasons would you favor outsourcing over owned and run?
Me:
a. Fact that cost estimates are current and these could be revised downwards as the outsourcing vendor acquires scale
b. Not a core function/the usual outsourcing arguments.
Tips: Take your time. Don't rush.

Round: Case Study Interview
Experience: Case
Estimate Gasoline Consumption of Cars in Mumbai in one year.

Estimation involved:
- Population of Mumbai
- Average Income
- Number of Cars ( This was estimated using an ‘affordability ratio’ –-> using the average price of a car, average life of a car and fuel and service expense required, an average operating expenditure p.a. on a vehicle was found. And this operating expenditure would be less than 20% of Household Income, hence assuming a normal distribution of Income, an estimate of number of cars was found)
- Average Distance Traveled per vehicle
- Average Mileage

Skills:
College Name: Indian School Of Business (ISB)