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CASE 4:   
CENTRAL POWER  
Firm Style Interview Round  
McKinsey, BCG, AT Kearney 2  
Case Question:  
Our client is a regional electricity monopoly. Due to regulation, its market will be opened to 
competition next year on January 1. There are no actual competitors at this time; however, 
the client would like ideas on actions to take in the short-term in order to better prepare for   
potential competitors. They have no control over pricing and cost-cutting during this time 
period.  
Clarifying Questions & Answers  
Provide the following answers only if the interviewee asks the corresponding 
questions. ​Question Answer  
Do we know of any potential competitors? None at this time. Central Power is facing the ​threat 
of market entry.  
Do you have any information on pricing? Not really; pricing is controlled by a government, so it is 
beyond our control and will   
be the same for any competition.  
Cont·d on ne[t slide 
CENTRAL POWER  
ClaUifing QXeVWiRnV & AnVZeUV (cRnW·d)  
Provide the following answers only if the interviewee asks the corresponding 
questions. ​Question Answer  
Are there other markets Central Power can 
enter?  
None at this time. Our engagement is focused 
on their home market.  
How is Central Power organized? Central Power has three divisions: 1. Sales and 
General Administration  
2. Generation and Transmission  
3. Maintenance and Repair  
How many employees are in sales? About one for every 1000 customers.  
Does sales, customer service treat certain 
customer segments differently?  
If there is a power outage, does Maintenance 
and Repair fix industrial clients first?  
Has Central Power ever advertised or had a 
marketing campaign?  
Is Central Power undertaking any capital 
investment?  
No, they treat everyone equally.  
No, they dispatch in the order of the call they 
receive.  
Not in recent memory.  
Not in the next year. 
CENTRAL POWER  
Framework / Structure  
This case is about customer retention within the home market. Since the client is a 
monopoly, market share is 100% and customer acquisition is irrelevant.  
The analysis may include, but is not limited to, the following 
areas: ​• ​Barriers to Entry  
• ​There is no actual competition to specifically target  
• ​The government is deregulating, so there are no possible external barriers ​•
Internal barriers are possible, such as increasing switching costs and 
commercial attractiveness to customers  
• ​Anticipation of Competitive Attack - Once the candidate sees the exhibit and 
realizes how attractive the industrial clients are, they can anticipate how a 
rational competitor would enter the market.  
• ​Market Information  
• ​Revenue  
• ​Customer Segmentation  
• ​Stakeholder Reaction - How will employees, unions, or local government                   
leaders react to our changes? (There is no set answer to this, just ask the                             
candidate what they think and see if it is logical and structured.) 
CENTRAL POWER  
Note: Strong plans will anticipate the need to be competitive and draw on 
analogous companies or situations.  
Less experienced candidates gravitate towards issues of pricing and cost-cutting. 
This is not a profitability case. Weak candidates will often explore growth outside 
the home market, such as expansion into adjacent markets. While interesting, this 
does not address the primary problem of what to do in the home market before 
deregulation. Avoid these tangents.  
Steer the candidate to ​customer retention. 
CENTRAL POWER ​Phase 1  
Qualitative reaction and quantitative analysis of revenue 
data ​Purpose:  
1. Test rapid understanding of a basic chart  
• ​Most candidates ask about revenue very early. Show them the attached 
e[hibit and immediatel ask, ´What is our reaction to this data?µ Strong 
responses notice the differences between the customer segments.  
• ​The ´historical dataµ is irrelevant. If a candidate starts to ask about it or discuss 
trends, inform them that is a factor or population and government 
determined prices, which are both beyond the control of the company.  
2. Test basic arithmetic  
Test basic math b asking the candidate (if the haven·t alread done so) to 
calculate the share of total revenue per segment and each segment·s revenue 
per customer. If a candidate didn·t notice the differences between customer 
segments alread, this is a second chance. Note: I don·t have a problem if a 
candidate wants to round the total revenue to $250 MM from $258 MM to 
simplif the math« 
CENTRAL POWER ​Industrial Commercial Residential  
# of Customers ​150 10,000 100,000 ​Revenue ​$150 MM $60 MM $48 MM ​Revenue per 
Customer ​$1,000,000 $6,000 $480 ​Residential Customer Equivalents ​2083 13 1 ​Fraction of 
Total Revenue ​150/258 = 58% 60/258 = 23% 48/258 = 19%  
NOTE: the math is really basic, but there are a lot of zeros that tend to trip 
up ​candidates. Most strong candidates write out the problem to avoid 
error, even if their math is facile. Now is a good time to diagnose how well 
the handle orders of magnitude. If this is a problem, here are some 
suggestions for the candidate. 
 
CENTRAL POWER  
3. See if candidate grasps key insight regarding higher value of industrial 
customers and uses it for convergent logic in Phase 2.   
• ​By now, candidates should realize that losing a single industrial customer is 
similar to losing more than 2000 residential customers. Churn of industrial 
and commercial customers is lower too and it is easier to approach a few 
hundred ´B2Bµ customers than one-hundred thousand individual 
homeowners, apartment renters, etc.   
• ​If a candidate still needs help, ask them, ´Let·s turn the situation around. 
Based on this data, if you were a competitor, which segment would you 
target?µ The should reali]e industrial customers. If the candidate doesn·t 
verbalize that Central Power should target or defend the industrial 
customers, then ask, ´OK, based on our insight about a potential 
competitor, what should Central Power do to pre-empt them?​µ 
CENTRAL POWER ​Phase 2  
Generation of ideas regarding customer retention improvements. ​• ​Now that the 
candidate grasps that any action should be biased towards the smaller and higher 
value segments, it is time to generate actual ideas. This part of the case is extremely 
unstructured- there are no more data sheets or obvious answers.  
• ​Assume Central Power is decades behind the rest of the business world- they have 
no website, send out massive paper bills, treat customers with the finesse of a huge 
monopoly, etc.  
Purpose  
Test candidate·s abilit to generate their own ideas with structure and logic ​• ​The 
prime differentiator between weak and strong candidates is their ability to have 
an exploratory conversation that exchanges ideas.  
• ​Strong candidates will announce that they want to discover ways of improving 
customer attachment (or retention, stickiness, etc.) to Central Power and begin to 
explore the structure of the company looking for areas to improve. They use a 
conversational style to ask questions. They typically draw on personal experience 
as residential customers of electricity (or another utility). 
CENTRAL POWER  
• ​Also, they may ask about the organization of the company or use a 
´value chain conceptµ to structure their questions regarding the 
organization of the company. At each part of the company, they ask 
questions about behavior, customer service, etc. to see if we focus 
on industrial clients. Great candidates really have some out-of-the 
box ideas, such as energy savings, simplified billing, special websites, 
improved terms for accounts receivable, etc.  
• ​You will know you have a strong candidate when they move 
methodically through the company and use their imagination. Let 
them continue on as long as possible b asking, ´What else?µ This is 
an opportunity to test a candidate·s ability to structure their 
reasoning and demonstrate conversation skills.  
• ​For instance, they should be able to tactfully move the investigation 
to a new part of the company when they have exhausted their 
imagination. ​These meta-skills are more important than specific 
ideas​, so feel free to make up whatever you want about Central 
Power·s operations. 
CENTRAL POWER ​Here are some ideas to facilitate customer retention 
by building a stronger relationship or making switching more difficult:  
a) ​Sales and General Administration  
i. ​Sign customer contracts  
ii. ​Increasing credit terms / days allowable for accounts receivable  
iii. ​Increasing the size of the sales force  
iv. ​Allocating sales staff to specific segments, since the value proposition is different ​v. 
Allocate special personal to high-value accounts  
vi. ​Reduce or simplify the billing process  
vii. ​Create a website for customers to manage accounts online.  
b) ​Generation and Transmission  
i. ​Consider building substations or redundancy that improves reliability or quality for 
industrial clients.  
ii. ​Work with industrial clients to improve their energy efficiency  
c) ​Maintenance and Repair  
i. ​Fix outages by order of customer priority, not first-come, first serve. (Besides, Industrial 
clients are more sensitive to power outages than residential customers)  
ii. ​Preposition repair equipment near clusters of industrial clients to reduce repair time. ​iii. 
Proactively visit clients to inspect their infrastructure or provide engineering advice 
CENTRAL POWER ​Weaker candidates face typically fall in 
two groups:  
Group 1 ² Lost in the Sauce: ​Some candidates have no idea how to 
systematically generate ideas. Try and prompt them by asking about their 
own experience with a power company, or ask them to think of the value 
chain.  
Group 2 ² Lone Rangers: ​Other candidates will have a systematic approach, 
but will make assumptions and monopolize the conversation. They declare, 
instead of explore, their way through this phase. They will make up their own 
data and draw conclusions. For e[ample, the might sa, ´Our client must be 
bad at customer service, so I would consider dedicating people to high-value 
clients.µ  
A real conversation should flow like this: ´Do we know how customers feel 
about service?µ Response: ´The hate it. The number one complaint is ´ever 
time I call, I speak to someone new.µ Candidate: ´Perhaps we should 
dedicate some sales staff to high-value clients that we want to retain the 
most.µ Response: ´Good idea, what else?µ 
CENTRAL POWER ​There are two other meta-skills to 
evaluate:  
• ​First, does the candidate explain their structure and line of reasoning? 
It should be ´transparent thinkingµ. I use an analog of a tour-guide. 
A strong candidate tells me where we are going with their plan, 
takes me through it, keeps me from getting lost when we ​go outside 
the plan, and brings me back.  
• ​Second, due to all the ideas being generated, a candidate needs 
good note-taking skills. Strong candidates will circle ideas on their 
plan or make a list in the corner of the page. When it is time to make 
a recommendation, they can quickly cover ideas at a glance. Weak 
candidates will attempt to recall ideas off the top of their head, 
usually without total success.  
End the case when you are out of time or the candidate is out of 
steam. 
CENTRAL 
POWER  
Recommendation  
The recommendation should include the following:  
• ​The answer ² We have developed several ideas for improving customer retention; all 
priorities should be biased towards Industrial customers.  
• ​Next steps ² Analyzing costs, potential ROI, and effects on stakeholders for particular 
customer retention initiatives.  
Strong Recommendation  
´By investigating the operations of your company, we have developed several ideas for 
strengthening customer retention in the face of competition. No matter which actions are 
undertaken, there should be a bias towards industrial customers who are more valuable as 
a group and on a per-customer basis. If any of these actions seem attractive to 
management, we can undertake more detailed analysis to support  
Tepid Recommendation  
Many times, students will say the same thing as above but with too much detail, too much 
length, or without enough structure. When they are done rambling, I ask them to ​say it​ ​again 
in 30-seconds ​or in three sentences. Sometimes it takes a few attempts, but it is more 
worthwhile then telling them later during feedback that their recommendation wasn·t good 
enough. (Close only counts in horseshoes and hand-grenades.  
Weak Recommendation  
Weak recommendations are missing a unifying aspect, such as customer retention. They                       
also fail to include the key insight regarding the preferential value of industrial customers.                           
Further, they may include something totally off-base, like cost-cutting or pricing. 
CENTRAL POWER ​Questions to Further Challenge 
the Interviewee  
1. ​How do you think the employees (or another stakeholder) will feel 
about these changes?  
2. ​What do you think it will be like working for a client that lacks a 
history of customer service? 
CENTRAL POWER ​Exhibits 

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Workshop Management Consulting Case Central Power

  • 1. CASE 4:    CENTRAL POWER   Firm Style Interview Round   McKinsey, BCG, AT Kearney 2   Case Question:   Our client is a regional electricity monopoly. Due to regulation, its market will be opened to  competition next year on January 1. There are no actual competitors at this time; however,  the client would like ideas on actions to take in the short-term in order to better prepare for    potential competitors. They have no control over pricing and cost-cutting during this time  period.   Clarifying Questions & Answers   Provide the following answers only if the interviewee asks the corresponding  questions. ​Question Answer   Do we know of any potential competitors? None at this time. Central Power is facing the ​threat 
  • 2. of market entry.   Do you have any information on pricing? Not really; pricing is controlled by a government, so it is  beyond our control and will    be the same for any competition.   Cont·d on ne[t slide  CENTRAL POWER   ClaUifing QXeVWiRnV & AnVZeUV (cRnW·d)   Provide the following answers only if the interviewee asks the corresponding  questions. ​Question Answer   Are there other markets Central Power can  enter?   None at this time. Our engagement is focused  on their home market.   How is Central Power organized? Central Power has three divisions: 1. Sales and  General Administration   2. Generation and Transmission   3. Maintenance and Repair   How many employees are in sales? About one for every 1000 customers.   Does sales, customer service treat certain  customer segments differently?   If there is a power outage, does Maintenance 
  • 3. and Repair fix industrial clients first?   Has Central Power ever advertised or had a  marketing campaign?   Is Central Power undertaking any capital  investment?   No, they treat everyone equally.   No, they dispatch in the order of the call they  receive.   Not in recent memory.   Not in the next year.  CENTRAL POWER   Framework / Structure   This case is about customer retention within the home market. Since the client is a  monopoly, market share is 100% and customer acquisition is irrelevant.   The analysis may include, but is not limited to, the following  areas: ​• ​Barriers to Entry   • ​There is no actual competition to specifically target   • ​The government is deregulating, so there are no possible external barriers ​• Internal barriers are possible, such as increasing switching costs and 
  • 4. commercial attractiveness to customers   • ​Anticipation of Competitive Attack - Once the candidate sees the exhibit and  realizes how attractive the industrial clients are, they can anticipate how a  rational competitor would enter the market.   • ​Market Information   • ​Revenue   • ​Customer Segmentation   • ​Stakeholder Reaction - How will employees, unions, or local government                    leaders react to our changes? (There is no set answer to this, just ask the                              candidate what they think and see if it is logical and structured.)  CENTRAL POWER   Note: Strong plans will anticipate the need to be competitive and draw on  analogous companies or situations.   Less experienced candidates gravitate towards issues of pricing and cost-cutting.  This is not a profitability case. Weak candidates will often explore growth outside  the home market, such as expansion into adjacent markets. While interesting, this  does not address the primary problem of what to do in the home market before 
  • 5. deregulation. Avoid these tangents.   Steer the candidate to ​customer retention.  CENTRAL POWER ​Phase 1   Qualitative reaction and quantitative analysis of revenue  data ​Purpose:   1. Test rapid understanding of a basic chart   • ​Most candidates ask about revenue very early. Show them the attached  e[hibit and immediatel ask, ´What is our reaction to this data?µ Strong  responses notice the differences between the customer segments.   • ​The ´historical dataµ is irrelevant. If a candidate starts to ask about it or discuss  trends, inform them that is a factor or population and government  determined prices, which are both beyond the control of the company.   2. Test basic arithmetic   Test basic math b asking the candidate (if the haven·t alread done so) to  calculate the share of total revenue per segment and each segment·s revenue 
  • 6. per customer. If a candidate didn·t notice the differences between customer  segments alread, this is a second chance. Note: I don·t have a problem if a  candidate wants to round the total revenue to $250 MM from $258 MM to  simplif the math«  CENTRAL POWER ​Industrial Commercial Residential   # of Customers ​150 10,000 100,000 ​Revenue ​$150 MM $60 MM $48 MM ​Revenue per  Customer ​$1,000,000 $6,000 $480 ​Residential Customer Equivalents ​2083 13 1 ​Fraction of  Total Revenue ​150/258 = 58% 60/258 = 23% 48/258 = 19%   NOTE: the math is really basic, but there are a lot of zeros that tend to trip  up ​candidates. Most strong candidates write out the problem to avoid  error, even if their math is facile. Now is a good time to diagnose how well  the handle orders of magnitude. If this is a problem, here are some  suggestions for the candidate. 
  • 7.   CENTRAL POWER   3. See if candidate grasps key insight regarding higher value of industrial  customers and uses it for convergent logic in Phase 2.    • ​By now, candidates should realize that losing a single industrial customer is  similar to losing more than 2000 residential customers. Churn of industrial  and commercial customers is lower too and it is easier to approach a few  hundred ´B2Bµ customers than one-hundred thousand individual  homeowners, apartment renters, etc.    • ​If a candidate still needs help, ask them, ´Let·s turn the situation around. 
  • 8. Based on this data, if you were a competitor, which segment would you  target?µ The should reali]e industrial customers. If the candidate doesn·t  verbalize that Central Power should target or defend the industrial  customers, then ask, ´OK, based on our insight about a potential  competitor, what should Central Power do to pre-empt them?​µ  CENTRAL POWER ​Phase 2   Generation of ideas regarding customer retention improvements. ​• ​Now that the  candidate grasps that any action should be biased towards the smaller and higher  value segments, it is time to generate actual ideas. This part of the case is extremely  unstructured- there are no more data sheets or obvious answers.   • ​Assume Central Power is decades behind the rest of the business world- they have  no website, send out massive paper bills, treat customers with the finesse of a huge  monopoly, etc.   Purpose   Test candidate·s abilit to generate their own ideas with structure and logic ​• ​The  prime differentiator between weak and strong candidates is their ability to have  an exploratory conversation that exchanges ideas.  
  • 9. • ​Strong candidates will announce that they want to discover ways of improving  customer attachment (or retention, stickiness, etc.) to Central Power and begin to  explore the structure of the company looking for areas to improve. They use a  conversational style to ask questions. They typically draw on personal experience  as residential customers of electricity (or another utility).  CENTRAL POWER   • ​Also, they may ask about the organization of the company or use a  ´value chain conceptµ to structure their questions regarding the  organization of the company. At each part of the company, they ask  questions about behavior, customer service, etc. to see if we focus  on industrial clients. Great candidates really have some out-of-the  box ideas, such as energy savings, simplified billing, special websites,  improved terms for accounts receivable, etc.   • ​You will know you have a strong candidate when they move  methodically through the company and use their imagination. Let  them continue on as long as possible b asking, ´What else?µ This is  an opportunity to test a candidate·s ability to structure their  reasoning and demonstrate conversation skills.  
  • 10. • ​For instance, they should be able to tactfully move the investigation  to a new part of the company when they have exhausted their  imagination. ​These meta-skills are more important than specific  ideas​, so feel free to make up whatever you want about Central  Power·s operations.  CENTRAL POWER ​Here are some ideas to facilitate customer retention  by building a stronger relationship or making switching more difficult:   a) ​Sales and General Administration   i. ​Sign customer contracts   ii. ​Increasing credit terms / days allowable for accounts receivable   iii. ​Increasing the size of the sales force   iv. ​Allocating sales staff to specific segments, since the value proposition is different ​v.  Allocate special personal to high-value accounts   vi. ​Reduce or simplify the billing process   vii. ​Create a website for customers to manage accounts online.   b) ​Generation and Transmission   i. ​Consider building substations or redundancy that improves reliability or quality for  industrial clients.  
  • 11. ii. ​Work with industrial clients to improve their energy efficiency   c) ​Maintenance and Repair   i. ​Fix outages by order of customer priority, not first-come, first serve. (Besides, Industrial  clients are more sensitive to power outages than residential customers)   ii. ​Preposition repair equipment near clusters of industrial clients to reduce repair time. ​iii.  Proactively visit clients to inspect their infrastructure or provide engineering advice  CENTRAL POWER ​Weaker candidates face typically fall in  two groups:   Group 1 ² Lost in the Sauce: ​Some candidates have no idea how to  systematically generate ideas. Try and prompt them by asking about their  own experience with a power company, or ask them to think of the value  chain.   Group 2 ² Lone Rangers: ​Other candidates will have a systematic approach,  but will make assumptions and monopolize the conversation. They declare,  instead of explore, their way through this phase. They will make up their own  data and draw conclusions. For e[ample, the might sa, ´Our client must be  bad at customer service, so I would consider dedicating people to high-value 
  • 12. clients.µ   A real conversation should flow like this: ´Do we know how customers feel  about service?µ Response: ´The hate it. The number one complaint is ´ever  time I call, I speak to someone new.µ Candidate: ´Perhaps we should  dedicate some sales staff to high-value clients that we want to retain the  most.µ Response: ´Good idea, what else?µ  CENTRAL POWER ​There are two other meta-skills to  evaluate:   • ​First, does the candidate explain their structure and line of reasoning?  It should be ´transparent thinkingµ. I use an analog of a tour-guide.  A strong candidate tells me where we are going with their plan,  takes me through it, keeps me from getting lost when we ​go outside  the plan, and brings me back.   • ​Second, due to all the ideas being generated, a candidate needs 
  • 13. good note-taking skills. Strong candidates will circle ideas on their  plan or make a list in the corner of the page. When it is time to make  a recommendation, they can quickly cover ideas at a glance. Weak  candidates will attempt to recall ideas off the top of their head,  usually without total success.   End the case when you are out of time or the candidate is out of  steam.  CENTRAL  POWER   Recommendation   The recommendation should include the following:   • ​The answer ² We have developed several ideas for improving customer retention; all  priorities should be biased towards Industrial customers.   • ​Next steps ² Analyzing costs, potential ROI, and effects on stakeholders for particular  customer retention initiatives.  
  • 14. Strong Recommendation   ´By investigating the operations of your company, we have developed several ideas for  strengthening customer retention in the face of competition. No matter which actions are  undertaken, there should be a bias towards industrial customers who are more valuable as  a group and on a per-customer basis. If any of these actions seem attractive to  management, we can undertake more detailed analysis to support   Tepid Recommendation   Many times, students will say the same thing as above but with too much detail, too much  length, or without enough structure. When they are done rambling, I ask them to ​say it​ ​again  in 30-seconds ​or in three sentences. Sometimes it takes a few attempts, but it is more  worthwhile then telling them later during feedback that their recommendation wasn·t good  enough. (Close only counts in horseshoes and hand-grenades.   Weak Recommendation   Weak recommendations are missing a unifying aspect, such as customer retention. They                        also fail to include the key insight regarding the preferential value of industrial customers.                            Further, they may include something totally off-base, like cost-cutting or pricing.  CENTRAL POWER ​Questions to Further Challenge  the Interviewee  
  • 15. 1. ​How do you think the employees (or another stakeholder) will feel  about these changes?   2. ​What do you think it will be like working for a client that lacks a  history of customer service?  CENTRAL POWER ​Exhibits