McKinsey Problem Solving Game (Solve): Full Game Reveal
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- เผยแพร่เมื่อ 11 พ.ค. 2024
- We're thrilled to present the first-ever complete walkthrough of the McKinsey Problem Solving Game!
This video takes you through the full assessment, including Ecosystem Creation, Redrock Study, and Plant Defense. As you watch, you're invited to solve the game along with us, offering a practical experience like no other.
We highly encourage you to visit our website to access the interactive game, where you can explore more scenarios: prepmatter.com/online/mckinse....
You'll find it's a cost-effective way to practice, priced significantly lower than similar simulations available, and offers the closest experience to the real-life assessment.
In this video, we start with ecosystem creation, choose a suitable location, and select 8 species to sustain an ecosystem. We show just one of the many possible strategies. You'll pick up techniques for effective note-taking and time management as we go.
Moving on, we tackle the Redrock Study, a newer segment of McKinsey Solve, where we delve into the study and case sections of the Nolotiles scenario, available on Prepmatter.
We wrap up with a dive into Plant Defense, offering strategies on allocating animals and barriers to protect the native plant.
[00:00]: Introduction
[01:48]: Ecosystem Creation
[13:40]: Redrock Study
[43:34]: Plant Defense
We hope you'll find this solve-along video helpful. If you have any questions or need further information, please drop a comment below, and don't forget to access the full game simulation here: prepmatter.com/online/mckinse....
Access McKinsey Problem Solving Game (Solve) Simulation now: prepmatter.com/online/mckinsey-problem-solving-game
Amazing video! Passed the McKinsey PSG this week thanks to Deniz's approach. Don't waste time on Excel Solver, just follow Deniz's method!
Did you solve the Redrock lab or Plante defense?
@@ibrahimmahmoud12 Ecosystem + Redrock lab + Case
Congratulations! Just got the test will be doing it soon too!
Hi
@@ibrahimmahmoud12 redrock lab
This is just great, I haven't come across any video that helped to solve the MSG this well, really appreciate these videos Deniz ,
Hey! One question with regards to Question 2 (Redrock Study): You have calculated the percentage change. However, the question was about the percentage POINT change.
My approach:
for summit depth --> (47-10)/10 = 370%
for base depth --> (35-8)/8 = 337.5%
Therefore, the percentage POINT difference is 370% - 337.5% = 32.5%
Well spotted! To avoid confusion, we'll remove 'point' from Prepmatter's simulation.
Thank you for this ❤
Thank you a lot!
I have waited for this for days😊😊
This could not have come at the best time. Thank you for this video!
You're welcome!
Many thanks
cant say anything but thank you so much for this video! i hope you’re having a great day too!
Thank you very much for your video. I did a good test. Your explanation was tremendously helpful!
Thank you for this, couldn't have been more timely 🎉🎉
Minor correction: Timestamp 8:52 Shrimp also consumes Red Moss. Not in the graphic drawn with the arrows.
Thanks for pointing this out. Indeed, shrimp also consumes red moss. As I was drawing the ecosystem, I forgot to draw the arrow from shrimp to red moss. Yet, I've factored this into our calculations.
Great video! Studied it twice and the assessment went very smoothly 👍🏻
Is this the Actual test?
Hi, love your videos. Could you please share some case studies link for digital transformation...thanks!
You can find digital transformation cases alongside over 40 cases in the Get the Offer course: prepmatter.com/get-the-offer
Are the answers automatically stored in the research journal or do we need to drag them after answering each question? Also, the description for each answer is added automatically or do we need to add it ourselves for reference?
Yes, your answers are automatically dragged (thankfully!), but you are expected to manually drag other data points into the research journal on your own.
Hello! Fantastic and informative video; thank you so much! Question for you: Is it important to show all calculations on the calculator in order to get the highest score? For me, doing 170-150 is easy mental math, as is converting .39 to a percentage. Is it ok to just do that in my head, or do you advise using the calculator for everything? Thank you!
In this video, we wanted to play it safe and use the calculator every time since the assessment evaluates the candidate’s behaviour. However, we don’t think it would be an issue to perform simple calculations mentally or by pen and paper.
Hey, I have a quick question on 21:37. The question is asking us to analyze BETWEEN December and April, but you include december in your analysis. I'm just a bit confused bcs I initially thought that the word 'between' means that we need to exclude December and April on our calculation (i think it'll be more suitable if the questions ask us to analyze FROM December TO April).. looking forward to your answer.. thanks
Is it possible to copy and paste text in the REAL Redrock test? Can you select and copy text from the questions and paste it elsewhere, or is the screen locked down to prevent copying?
Thank you for this! Could you please tell me why we use 27 as the division base instead of 37 (22:50 time stamp) for the snowfall percentage difference question? Would appreciate a prompt response!
I have the same question if you figured why please do tell me
Sure, because the question asked summit to base ratio. So it should be (summit-base)/base. Let me illustrate with an example. If I ask how much higher 12 is compared to 10 in percentage, you'd do (12-10)/10, so 20% higher. I know it's trickly, but hope that helps!
Thank you so much for your response. So in essence, if the question asked was based on to summit ratio, it would have been summit- base/ summit??
Thank you so much for your response. So in essence, if the question asked was based on to summit ratio, it would have been summit- base/ summit??
In the report why did you fill november as the lowest rainfall month when may had the 0 lowest rainfall days AND 0 Lowest average rainfall
Nice video! How you calculate the percentage difference?
((Last value - First value) / First value) - 1
But if you need more clarity on a specific section in the video, let us know!
@@Prepmatter "Calculate the difference between the two values, divide by the average of the two values, show that as a percentage", which is what I got when google it. Seems not as the way as you did. Please let me know if I am wrong.
When doing the "solve" test, what is recorded?
Do they record everything that goes on your computer and do you need to have a webcam on?
No you don’t have to. They only record the screen of your game, so You can use excel, etc. Later You will be asked to answer some questions in survey and there is a question about other things that you’ve used to complete the test.
We understand that certain activities, such as mouse movements, navigating back and forth between pages, and the time taken to answer questions, are evaluated. However, we don't have complete clarity on their significance in the overall performance assessment. Also, you are not required to turn on your webcam at all.
Hi, did the PSG present the same questions like this video and also the same problems in the game? As you already did it. Btw, I'm the one from the other video ^^ @@Pac-yr5zv
I have 3 questions. 1. if we finish ecosystem early, will the saved time translate to redrock? 2. Do you have to finish the whole redrock in order to pass PSG? if yes but I am running low on time which I should prioritize during redrock? finishing anyway or just be correct but its fine not to finish 3. Do we have to use calculator?
1. No, each section has a dedicated time.
2. We had trainees who passed the assessment without completing all the mini-cases. Hence, they are still testing whether six mini-cases are optimal or not; previously, it was ten. We cannot say what to prioritize because we do not have clarity on the grading system for each question.
3. You should use the calculator provided in the assessment, as McK is also testing this.
Why did you do 47-10 and 35-8 instead of 47-0 and 35-0 for the second question in the Redrock study even though the lowest points were 0?
The question requires data between December and April, May and November are not part of it
In the ecosystem game, what do you recommend to do if we already formed a food web but one of our animals doesn’t comply with the region we selected (ie. different salinity level, different current level, etc)
The actual game shouldn't be too tricky. Typically, if species meet 1 or 2 criteria in the chosen location, they almost always fulfill the other requirements.
Timestamp 37:24 The question asks, “… if the realistic scenario is realised for all 3 activities”. If this was the case, the likelihood would be irrelevant altogether and a total of 8 + 5 + 4 = 17 species would have been saved.
The question should have put the Likelihood percentages given below each graphs into context and how it relates to the animals saved.
I completely agree... was scrolling through the comments hoping someone would have pointed it out.
Please is there anything we need to consider before choosing any location or we can just choose randomly?
You may want to briefly scan the species cards first.
Often times, more than one location will have a viable solution. In case you cannot find a sustainable ecosystem in your chosen location, it is fine to start from scratch in a different location.
This is the best solved game ever. Thank you so much prepmatter. However, I have a question. Why were you subtracting 1 from the decimal when converting to percentage? E.G. 1.1842 -1 Could you pls explain why?
It's just the way answer fields were organized. Since it already had % next to it, I had to deduct 1
Alright, thank you.
@@johnnationibetobou3426 please can you explain better to me I didn't quite understand
How much time do I have for the redrock research game? (both studies and cases) @Prepmatter
35 minutes in total. Feel free to check out our other video to learn more about the game structure: th-cam.com/video/xgfKxmrpiv8/w-d-xo.html&ab_channel=Prepmatter
ok thanks! how do i carry out my plan in the tutorial before starting the game? or is this not possible?@@Prepmatter
is there an excel template to be used during the assessment? please help
No, we don't recommend using an Excel template for this assessment. We actually addressed this at 12:07 of our other video: th-cam.com/video/xgfKxmrpiv8/w-d-xo.html&ab_channel=Prepmatter
At 23:43, The percentage decrease should be (19-23)/19 *100 >>> (New-old)/old* 100. Please correct me if Im wrong
no, you can calculate it like this:
23 * x% = 19
and we want to find x%, therefore:
x% = 19/23, which is ~82.6%. The reduction is 1-0.826 = 0.174
AKA (1 - 19/23) = (23-19)/23 = 4/23 = ~17.4%
Is the ecosystem sustainable with spadefish instead of sea urchin? as per my calculations it is, can you advise?
Yes, that would work well too! There are many other possible variations. Feel free to explore our interactive simulation to practice with different environments, including a coral reef and a mountain ridge scenario!
I think you can also go with lanternfish eating shrimp and shark eating lantern. seems like there are multiple options.
@@felixcristiano759 I went for the 5 animals as follows (in eating order): (1) Blue Jelly fish, (2) Loggerhead Sea Turtle, (3) Lanternfish, (4) Shrimp and (5) Sea Urchin… plus the 3 producers… (6) Red Moss, (7) Sea Fan, (8) Sea Lettuce.
Does anyone have access to excel to solve the game Ecosystem?
In the ecosystem, is it recomendend to check the calories or the environment monitors first?
Environment monitors, just like 04:06
I have two question please
1. Must we pick three producers
2, sea urchin needs more calories why not remove it instead of spade fish
Thank you for your questions.
1. You don’t have to pick three producers. Sometimes you might start with three and remove one along the way.
2. There are multiple possible variations - we simply chose sea urchin for this example. Feel free to explore our interactive simulation to practice with different environments, including a coral reef and a mountain ridge scenario!
Why do we subtraction 1 to get the percentage in question 4 under the red rock segment
Oh, that's a method we always use to calculate the percentage difference. For instance, if we want to determine how much higher 120 is compared to 100, we divide 120 by 100, which equals 1.2 or 120%. However, we can't say 120 is 120% higher than 100. Therefore, we subtract 1 (or 100%) from 1.2 (or 120%), resulting in 0.2 or 20%. Thus, 120 is 20% higher than 100. Hope this helps!
Do you know if I can take the games in other language that it is not english and if this affects the final score?
It won't have any impact. We are aware that the game can be played in English, Spanish, Portuguese, or Japanese. McKinsey advises that you should play the game in the language in which you feel most comfortable.
@@Prepmatter french is not is the list?
For the snow depth level, I can see that the average base snow depth in November is 0, how come we didn't select that as our lowest value when calculating the difference between the highest and lowest base snow depth?
I believe it was because, in the question, it said between December and April.
Sir , I want to know that after clearing this test , Is it confirmed that they will go ahead for interview??? Or still its not sure!
McKinsey sends the game invite automatically upon application submission. The team then evaluates the online assessment performance and resume together before making a decision to interview.
At 23:45 why do we do 23-19/23 ? Shouldn’t we do 23-19/19 I thought the formula was final value-initial value/initial value ?
I have a question why would shrimp consume sea lettuce and red moss equally even though they eat sea lettuce only?
Thank you
Thanks for your question; shrimp consume both sea lettuce and red moss actually (as you can see at 07:30 and 09:34). As I was drawing the ecosystem, I just forgot to draw an arrow from shrimp to red moss (thanks for pointing it out!). But I've factored this into our calculations, and hence, the ecosystem is sustainable!
@@Prepmatter thank you so much for your help, effort and the detailed reply.
I have another inqury, should shrimp also get consumed for the system to be more sustainable or is it okay if one species or two are only consuming calories but not consumed as you pointed out on the diagram? In the shrimp case, for example and to elaborate, no other species has any sort of a connection for the shrimp to be consumed unlike the sea urchin where at least it can be eaten by the sea turtle.
Thanks in advance@@Prepmatter
In 26.26 why are you doing average summit- base depth then dividing by base depth and not dividing by average summit?
Because the question asked summit to base ratio. So it should be (summit-base)/base. Let me illustrate with an example. If I ask how much higher 12 is compared to 10 in percentage, you'd do (12-10)/10, so 20% higher. I know it's trickly, but hope that helps!
There is some confusion in the Eating Rules under guidance. Timestamp 3:00
I would recommend the following changes in the wording:
Para 1:
The species with the highest “Calories Provided” eats first….
The animal eats its “Food Source” with the highest “Calories Provided” in the first instance… providing that the “Calories provided” of the prey satisfies the “Calories needed” of the respected Animal.
If the Animal is feeding on multiple sources of food, AND they ALL provide equal amount of calories (e.g. Sea Lettuce providing 3000 cal. and Red Moss providing 3000 cal.), then the Animal will eat both prey equally… e.g. 1,500 cal. from each.
Para 3:
Then the species with the next highest “Calories Provided” eats in the Ecosystem….
If there is a tie between “Calories Provided” for the Animals (e.g. Sea Urchin providing 2,100 cal. and Spadefish providing 2,100 cal.), then no Animal will take priority as the “primary eater” and will therefore split their food source equally. E.g. Sea Urchin and Spadefish both eat Sea Fan, they would fulfil their calorie need by utilising 50% of the prey’s “Calories Provided”.
This information is given at Timestamp 9:46 but not included in the Eating Rules under guidelines, or at least clear enough.
Thank you for your comment. The guidebook of our online simulation reflects of the real assessment.
Nice vid
Hello, is it going to be the same tasks in the McKinsey game, or do they change it?
Thanks for your question. If you're asking whether the tasks will be the same as those in the video, they will be different, as we're showcasing scenarios our Prepmatter team created. If you're inquiring whether McKinsey changes the questions periodically, we unfortunately don't have visibility on that.
@@Prepmatter Thank you for your reply! Do you mean we will have same games but different scenarios?
@@GeorgesElKerr That's right!
What can i do to make sure a location is going to allow me to have a sustainable ecosystem??
You can always scan the species specifications first, but there is no clear shortcut. In the unlikely case where you cannot find a sustainable ecosystem, it is ok to start from scratch in a different location.
Why do you divide divide 10/8 and not subtract 8 from 10 and then divide by the base? (time stamp 25 mins)
That's also correct, it'd give you the same number!
Shrimp only eats sea lettuce right? why did you let it consume both sea lettuce and red moss?
I have the same question too
Thanks for your question; shrimp consume both sea lettuce and red moss actually (as you can see at 07:30 and 09:34). As I was drawing the ecosystem, I just forgot to draw an arrow from shrimp to red moss (thanks for pointing it out!). But I've factored this into our calculations, and hence, the ecosystem is sustainable!
after finishing ecosystem game i had a video showing 3 species, does that mean only 3 survived?
I believe you're referring to the actual assessment. After completing the ecosystem creation game, you are presented with animations featuring 3 animals, selected at random. This does not necessarily mean that only 3 animals survived :)
@@Prepmatterthank you very much, I hope I did everything right! 🤣
@@Pac-yr5zvdid you pass the game?? Can i ask questions regarding the game because I have the game test this week😊thanks in advance!
@@putrinareswarisularno3297 I’ve taken that test and I’m currently waiting for interviews:) (If I did everything correctly) Feel free to ask about anything that comes to Your mind;)
@@Pac-yr5zv Is the game presented in the video looks the same as the actual assessment? as well as for the ecosystem game, do you recommend choosing the location monitor first or building the food chain first? Thank you
In the ecosystem, wouldn't it be safer if we removed the Sea Urchin instead of the Spadefish, considering the Spadefish requires less calories so it would eat less Sea Fan?
Interesting, there are often multiple correct answers. If you've purchased our interactive game, please try it and let us know how it turns out!
@Prepmatter, i need to solve the forest ecosystem game, if you have a recording please send me
You can access Prepmatter's simulation here, where you can also find the Mountain Ridge game: prepmatter.com/online/mckinsey-problem-solving-game
it is exactly the same just with altitude instead of depth and oxygen instead of salt etc.
How close is this simulation to the actual game? Can anyone who has taking the test recently comment on the resemblance of the simulation for the actual game?
Hi! We’ve consistently received feedback that the simulation is a true reflection of the real game.
I confirm that the platform is very accurate.
Wouldn't it be safer if we removed the Sea Urchin instead of the Spadefish? They both provide the same calories, but the Spadefish requires less calories so it would eat less of the Sea Fan?
Interesting, there are often multiple correct answers. If you've purchased our interactive game, please try it and let us know how it turns out!
I just finished the ecosystem test and don't know if my species survived or not
Yes, there’s no live feedback in the real life game unfortunately. But how do you think you performed? Hope you took all the time you need to double check your ecosystem.
I was a bit panicky and submitted the answer even though I still had 10 minutes left for the ecosystem game :(
At 9:36, why do you subtract 4500 - 3000? Why would it not be 3000 - 3000? I thought that the amount of calories consumed was the second number in your parentheses? And that the first number "calories provided" was the amount of calories that that fish would provide another fish if it was consumed?
exactly my question it should be zero
If I understood your question, you're asking why we subtracted 1500 from Red Moss and Sea Lettuce (and not 3000 from any of these species). That's because both producers have the same amount of calories provided (3000), so Blue Jellyfish will eat both equally.
I was wondering in case 5, was it not the april data we should have added the increases to? Of 16 increses by 4 shouldn't the other numbers in April increase too ( as against the May data)?
Could you provide more details about your question so that I can help you better?
in the first activity you didn’t draw a line from shrimp to red moss fyi-confused me so much
That's right! As I was drawing the ecosystem, I forgot to draw an arrow from shrimp to red moss (thanks for pointing it out!). But I've factored this into our calculations, and hence, the ecosystem is sustainable!
impossible to play online, there's only one specie available :(
That’s the demo version so that you’re familiar with the interactive nature of the game. Once you’re enrolled in the course, you’ll have access to the full game!
The eating order is unclear in the video:
The species with the highest “Calories Provided” eats first….
The eating order is not simply sorted by organising the animals from the highest “Calories provided” to lowest at the very start of the task.
When an animal (or producer) is consumed by another animal, the remaining amount of calories left on that Animal may change the “eating order” as the reduction changes "calories provided" of the respective animal.
So in this example, if you determine the eating order right at the start by looking at the "Calories provided", you would get: (1) - Great White Shark, (2) - Blue Jellyfish, (3) - Sea Urchin, (4) - Shrimp, (5) - Loggerhead Sea Turtle, and producers do not eat.
However, if do the calculations and shuffle the eating order as you go, you will end up getting the following eating order: (1) - Great White Shark, (2) - Blue Jellyfish, (3) - Loggerhead Sea Turtle, (4) - Shrimp, (5) - Sea Urchin, and producer do not eat.
So the eating order changes progressively in the process.... This is not clear in the video.
Thank you for your comment. Indeed, it is important to keep the eating order rules in mind when building the ecosystem.
Good point but I think you are mistaken in the eating order. Considering the current calories provided as you go, the loggerhead sea turtle should eat last considering after it's been eaten by the shark has the least amount of calories provided (150). Or am I missing something?
@@astriddymling6917 No, you are not missing anything. After I left the comment here, I went back to my xls and noticed the eating order mistake I made in the comments. I carried on with my prep so forgot to go back and edit it. The eating order is as follows:
(1) - Great White Shark, (2) - Blue Jellyfish, (3) - Shrimp, (4) - Sea Urchin, (5) - Loggerhead Sea Turtle, and producer do not eat.