Case Interview之 Market Sizing 破解之王

Market Sizing就是面試時問的估算問題
(ex: 請估一下台北101的food court每天多少人吃?)
昨天練習後, 覺得肯定可以練的更好些
上網找了一些資料, 發現這個Process還不賴
滿適合提醒自己哪裡miss了

1.Ask initial questions--問看看, 確認人家倒底在問什麼?
要的是人數還是營業額?
坐在food court沒買的人算不算?
有些人買了好幾攤(主餐, 飲料, 點心),那算幾個人?

2.Develop approach & Hypothesis--提出自己的算法
因為他們餐飲大部份都有叫號(除了樓上?)
根據經驗, 每一號並非一個人點
然後101大概100間吧?(不然可以去查查資料很好找)
food court裡店家數 * 每天叫號次數 * 每一號有幾份= 人數
Say:"Does it sound logical and ok ? Shall I continue?"

3. Dive into details
假設每人吃一份, 裡面有100間, 在平日時段, 每間平均一天serve 300號
approach--從供給的店鋪來算
算一算
100*300*2 = 60000

4.Summarize & Pull up
Say: "I estimate there're about 60,000 ppl dining there."
有沒有什麼辦法可以更精確呢??

Rule No.1

As we all know, the price level in Europe is higher, which is specially obvious in NL where the transportation fees are the most expensive among all countries I travelled. It costs about NT$130 to commute from my dorm to the school, VU, every day. Going to city center costs much more! (Bummer! NTD should have appreciated earlier.) That's why we developed a way to save some money. And this one is dedicated to the best friend I made in NL, Mathieu Malliot, who fought together with me in the course FBI and guided us through every path in Paris.

Many people try to "ride black" in NL without a systematic method. Maybe they do, but they hide it. Here, I would not shun discussing this topic. Moreover, I want those fellow students going to NL to know about it, 'cuz I am safe now. Haha!! We already tested it million times without a single failure. The rules are:

No.1 Always stand at the front of the first carriage whenever possible. It's easier for you to carefully 'examine' if there is a inspector(controller) coming in. If there is, be cool and get out of the carriage without any hesitation. Just pretend that this stop is the one you want to get out.

No.2 Bring a stippen card with you all the time and stand right next to the stamping machine, if any emergency happens that hinder you from getting out, stamp it immediately!!

No.3 Stamp all the time when go to down town where lots of inspectors are eager to fine you heavily.