Originally posted by: AndyHam

Dear IBM,

The FJSP-transbot models outperformed all other approaches in literature. However, researchers solved only small sized instances.

Now, I would like to try medium-large sized instances. I found the well-known instances, but it is not trivial to reformat the instances into OPL format.

http://people.idsia.ch/~monaldo/fjspresults/TextData.zip

Can you please post the benchmark instances in OPL format which were used for the following "constraint_programming benchmark"?
I will add robot travel times into the instances and run FJSP-transbot models.
https://www.ibm.com/developerworks/community/blogs/jfp/entry/solving_flexible_job_shop_scheduling_problems?lang=en
Thanks,
Andy

Originally posted by: PhilippeLaborie

As you can see in the post, we did not use OPL for benchmarking but C++: "The model we use for FJSSP is given below in OPL.  We actually used the C++version in our experiment but performance is quite similar whatever API is used (C++, Java, .NET or OPL)."

So we do not have the data for instances in OPL format, we directly read the original data in C++. If you are interested I can send you some C++ code we used for reading these data files.

Originally posted by: AndyHam

C++ code for data-read will be very appreciated. Thanks!

Originally posted by: PhilippeLaborie

In fact, you can look in the installation directory of CP Optimizer. You will find the c++ example for FJSP in cpoptimizer/examples/src/cpp/sched_jobshopflex.cpp: this files reads the classical instance format (note that they maybe a few discrepancies). And if you prefer java, you can look cpoptimizer/examples/src/java/SchedJobShopFlex.java.

Originally posted by: AndyHam

Thanks!
I have successfully modified the sched_jobshopflex.cpp to change the format into OPL.

tuple t_mode {
  int o;   //oper id
  int j;   //job id
  int mch; //machine id
  int pt;    //processing time
  int isFirst; //1 if it is the first operation of job j
};
 

// reading a text file
#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int main() {

    for (int r = 1; r <= 40; r++) {
        string line, s, t;
        s = to_string(r) + ".fjs";
        t = to_string(r) + ".dat";
        if (r <= 9) {
            s = "0" + to_string(r) + ".fjs";
            t = "0" + to_string(r) + ".dat";
        }
        s = "C:/Codes/OPL/IntegratingMTS2Production/instances_FJSP/Hurink_Data/Text/sdata/la" + s;
        t = "C:/Codes/OPL/IntegratingMTS2Production/instances_FJSP/Hurink_Data/Text/sdata/la" + t;
        ifstream file(s);
        ofstream oFile;
        oFile.open(t);

        int nbJobs, nbMachines;
        float nTemp;
        file >> nbJobs;
        file >> nbMachines;
        file >> nTemp;

        int o; o = 1;
        bool f;
        oFile << "nj =" << nbJobs << ";" << '\n';
        oFile << "nm =" << nbMachines << ";" <<  '\n';

        oFile << "Modes ={" << '\n';

        for (int i = 1; i <= nbJobs; i++) {
            f = 1;
            int nbOperations;
            file >> nbOperations;
            for (int j = 0; j < nbOperations; j++) {
                int nbOpMachines, k;
                file >> nbOpMachines;
                for (k = 0; k < nbOpMachines; k++) {
                    int m, d;
                    file >> m;
                    file >> d;
                    oFile << "<" << o << "\t"  << i  << "\t" << m << "\t" << d << "\t" << f << ">" << '\n';
                }
                o++;
                f = 0;

            }

        
    oFile << "};";
    }

    return 0;
}