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Shift roster (calendar) - mathematic optimization algorithm

I have question about heuristic searching problem - I need to plan shift roster for workers. My solution is to use some bio-inspired algorithm. My implementation is: I created list of timeframes (...
KamikazeNB's user avatar
1 vote
2 answers
99 views

Need help writing a metaheuristic problem

I have a matrix which contains compatibility scores between objects. I have 56 objects, thus, the matrix dimensions are 56*56. I need to group said objects in groups of 8 to 10 elements. I have tried ...
slow_learner's user avatar
1 vote
1 answer
97 views

Optimization algorithm for space debris

I'm currently working on a research project to optimize the recovery of space debris. We have to recover 50 pieces of space debris with the minimum number of missions possible. The missions are sent ...
HunKhle's user avatar
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3 votes
1 answer
296 views

Is evolution algorithm suitable for combinatorial optimization problem

I'm wondering if evolution-like (or genetic) algorithms are competitive for combinatorial optimization (CO) problems, such as knapsack, maximum independent set, travelling salesman etc. problems in ...
Elam Harnish's user avatar
3 votes
0 answers
86 views

Pygmo2: What is the point of evolving an archipelago in a loop if number of generations already set in algo

I want to solve a multi-objective problem with nsga2 or moead taking advantage of the parallelism available in pygmo library. I have seen a very nice example on github posted below. However I am not ...
Sophie's user avatar
  • 31
2 votes
1 answer
195 views

Job scheduling for a 2 stage job with 2 machines available for each stage

I am trying to solve a problem where I am provided a list of jobs that need to be scheduled to minimize the processing time. Every job has to be performed in 2 stages where the second stage can be ...
ashorj's user avatar
  • 21
6 votes
1 answer
249 views

Use GA for Assignment Problem?

I have a two-objective assignment problem that appears to converge really slowly to a solution. Even if we just have 1 objective that minimizes costs, it appears to be very slow for a worker-task ...
Nyxynyx's user avatar
  • 179
4 votes
0 answers
144 views

When to use Tabu Search or Genetic Algorithms and when not?

Are there any rules of thumb about when to implement which? For example, I am trying to solve OR scheduling problems. I see that majority of people have implemented Genetic Algorithms. However, more ...
Amogh Bhosekar's user avatar
10 votes
3 answers
2k views

Are Metaheuristics and Evolutionary Algorithms the "Gold Standard" for the Traveling Salesman Problem?

Are Metaheuristics and Evolutionary Algorithms the "Gold Standard" for the Traveling Salesman Problem? I am interested in learning more about how we have been able to solve the (famous) ...
stats_noob's user avatar
  • 1,841
1 vote
1 answer
162 views

Genetic Algorithm

I am evaluating a genetic algorithm that was written for a vehicle routing problem with time windows. The problem was not solved with any exact method (or with any solver). I also do not know bound of ...
mars's user avatar
  • 629
3 votes
0 answers
192 views

Good book to get familiar with the key concepts of Operations Research for a person which didn't enjoy a good math education in university?

I am currently reading research papers on optimization problems in logistics and struggle to understand the math notation. Any good beginner friendly books you would recommend? This is the paper I ...
Eddiee's user avatar
  • 533
1 vote
1 answer
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I didn't understand my problem with PSO and GA

I have a problem with three objective functions to be minimized, F1(interval value is [0,100]); F2(interval value is [0,100]); and F3(interval value is [0,20]). To solve my problem, I use Particle ...
MAJID majid's user avatar
1 vote
0 answers
172 views

Relationship between Hypervolume and population size, number of generations, and number of functional evaluations?

I have a multi-objective optimization with the following properties: Objective function: two non-linear functions and one linear function Decision variable: two real variables (Bounded) Constraint: ...
vp_050's user avatar
  • 179
-1 votes
1 answer
523 views

How to interpret velocity computation in Particle Swarm Optimization?

Please in PSO metaheuristic when we calculate the velocity what is the advantage of using pBest?
MAJID majid's user avatar
1 vote
3 answers
324 views

Prove NP Hardness for non-convex multi-objective optimization

The multi-objective optimization problem in my case is non-linear as it consists of three objective function of which two are nonlinear function and the third is a linear function. Lets say objective ...
vp_050's user avatar
  • 179
1 vote
0 answers
145 views

Which multi-objective optimization algorithm should one select?

The multi-objective optimization problem in my case is defined below: Objective 1: Minimize $f_1(X_1,X_2)=C_1X_1+C_2X_2+C_3X_1^2+C_4X_2^2+C_5X_1^2X_2^2$ Objective 2: Minimize $f_2(X_1,X_2)=D_1X_1+...
vp_050's user avatar
  • 179
7 votes
2 answers
164 views

Measuring performance of Genetic Algorithms

I'm looking for information concerning Genetic Algorithm (GA) outputs reliability. I've found some papers applying metaheuristics that have run their algorithms 30 times and got the best solution ...
campioni's user avatar
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