# Choosing the right fuel (III): Whose perspective?

In this post, I will try to flesh out the perspective of a shipping company whose goal is to reduce its carbon footprint. Let us say there a shipping company that owns and...

# Port of LA: Storage Space is the culprit?

Recently I read about the saga at the Port of LA. According to Ryan Petersen, the chief executive of logistics company Flexport, the real bottleneck at the Port of LA was...

# Why Supply Chain Delays are Multi-faceted: A Mathematical Explanations (Without the Heavy Math)

Paul Krugman recently penned an excellent article explaining why we see the supply chain snarls in New York Times. It mentioned a number of factors: The US consumers are...

# Tesla Lease Mileage Limit and the Central Limit Theorem

I am onto my second Tesla car leases now, so I think I can define another form of range anxiety with my leased cars: Driving over the lease limit. It was actually quite...

# SHOULD I BUY OR LEASE A TESLA? PART 4: It all comes down to your apetities towards risk

Having used multiple spreadsheets to illustrate the dollars and cents around the leasing vs buying option, let me conclude. It depends on how you view uncertainty. As I said...

# SHOULD I BUY OR LEASE A TESLA? PART 2: Total loan cost (when you are sure about the depreciation)

In a previous post, I calculated the total cost of leasing a Tesla, using my own experience as an example. Before we move on to the buying option, let me mention one important...

# Should I Buy or Lease a Tesla? Part 1: Leasing Cost

Recently I read quite a bit of discussion on “Should I buy or lease a Tesla?”. I do not want to weigh in on which side I take, as I know it is not just about...

# Simulation: Is demand equal to sales? (Part II, and why is there a Loch Ness Monster?)

In an earlier post, we discussed the difference between demand and sales using a simulation exercise. Now the question is: How can we visualize the difference? To start off,...

# Simulation: Is demand equal to sales? (Part I)

Consider the following problem: Suppose at a retail store the annual demand for a toy is a random variable with a normal distribution of N(600, 100), i.e., with mean of 600...

# Modeling Driving Distances (3)

Since my last post on using NTHS dataset to fit people’s driving distances, I have made some further modifications: (1) There are some very large TRPMILE data values, in...