# Questions tagged [operations-research]

uses mathematical and statistical methods to improve efficiency

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### Robust or Stochastic Optimization Approach for Maximizing Profit with Limited Price Information

I am tackling a linear maximization problem where I need to select the optimal product among several options over a series of weeks, given certain constraints, in order to maximize future profit. The ...
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1 vote
11 views

### Stochastic Task Processing Times in Queueing Theory

I'm struggling with an operations research problem which has 3 stations containing 3 different task processing times and different coefficients of variation (for example, station 1 has 3 tasks with ...
28 views

### What is the approximate distribution of the distance between gas stations along a highway?

Thinking it should be exponential, but I could be wrong.
1 vote
35 views

### Case study question on profit optimization

A famous restaurant selling burgers has closely studied the demand for burgers for past months including the times the customer requested a burger and it was already sold out. Further analysis of data ...
1 vote
18 views

### Estimating Joint Probability from limited data

This is probably a broad question but I am interested in getting the Joint PDF for n random variables each of which can take integer values within a finite range. I have data in the form of time ...
1 vote
102 views

### Python implementation of standard Expectation maximization algorithm to estimate position bias in LTR

Is there any Python implementation that would allow to use logs data of clicks and their ranking, and return and estimate of relative position bias as discussed in section ...
• 11
65 views

### Criteria evaluation for cluster generation in R

The code below finds the "optimal" number of clusters. In the example below, the result was 2 clusters. Quickly explaining the code: first, the Ideal Point is calculated, which has the ...
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97 views

### Can I use xboost as objective function in an optimization problem?

I am working on a marketing optimization problem, where the goal is maximize profit by optimally allocating spend to different products. Constraint is getting at least 1 Million revenue. As a first ...
• 827
1 vote
31 views

### What methods exist to identify the optimal splits in some exogenous variable, such that a dependent variable is maximized?

I've come across an interesting problem recently, and I'm wondering if I'm missing some obvious approach here. The problem statement is thus: Imagine I run an online business, and I'm interested in ...
527 views

### What are differences between industrial statistics and social science statistics/econometrics that are potential stumbling blocks?

Main question up front: what are differences between econometrics/social science statistics that and industrial statistics that people switching between the two should be are of? I got a PhD in ...
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49 views

### Statistical approach for football competition

There are 10 teams in a club. Each week, there are 3 games where each team plays another team from the same club. All games are played in the same park. The park has 5 pitches. There are 5 teams that ...
158 views

### Where can I learn the math behind how airlines dynamically price tickets?

It's easy to think of factors that airlines take into account, and how the price will vary over time. There are no shortage of articles or medium posts about that. But how can I frame this as a ...
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1 vote
128 views

### Visualising Gantt chart distribution

I perform $n$ simulations of operations planning. I can plot a gantt chart for each simulation, but I am interested in visualising the variability of the whole simulation set : I want a Gantt ...
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961 views

### Bayesian genetic algorithms?

I'm not sure that "Bayesian genetic algorithms" is a real term or even a concept in research. For a while now, I've preferred genetic algorithms as my go-to heuristic optimization technique, ...
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362 views

### How to derive a conclusion with the scatterplot that we made using the data in a quantitative research? [closed]

How can we write the result section by using the scatter plot that we made using the data in a quantitative research. Also most importantly if the scatter plot shows no correlation.
65 views

### Survival analysis with unobserved right censoring

Assume we have a tire shop and would like to build a survival curve for the lifetime of our tires.Once we know how long our tires are useful, we can send push notifications prompting customers to get ...
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2k views

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### What type of test / research design is recommended for this analysis

It is assumed that people are not seeking for help when they need to, therefore a program is implemented to teach them when to seek help. People can join the program voluntarily. I would like to study ...
1k views

### Reverse Code for Factor Analysis

I have done my survey, and now I need to do the data analysis. However, I am not sure whether or not I need to do the reverse code at the first step before I can do the remaining analysis. There are ...
1 vote
90 views

### Modeling worker performance parameters for optimum allocation of tasks to workers

Lets say we have an English to French translation task in a company and there are 100s of workers who are proficient in doing this task but each worker has its own unique attributes which allow them ...
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89 views

### Sample size for clinical research

I determined the sample size already (25), but I want to know if it has to be increased because of a minor change. Our study consists of two groups - one will be sedated and the other will not. For ...
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1 vote
318 views

### online bin packing and machine learning

I am trying to optimize scheduling disk allocation in data centers. In nature it is an online bin packing problem. But, since each customer has it's own behavior or kind of workload I was wondering, ...
137 views

### A YouTube View Estimator [closed]

Here's a thought experiment that I can't come up with a good answer for. Imagine you have 5 YouTube videos that you want to reach 50,000 views (10,000 views per video) by the 10th day after ...
4k views

### Constrained assignment problem (Linear Programming, Genetic Algorithm, etc...)

I'm looking for advice on how I should approach a specific problem. I have about 1000 shops that I have to assign to about 20 different supply centers out of a possible 28, and I'm trying to pick the ...
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