JSSP.data module

class JSSP.data.Data

Bases: abc.ABC

Base class for JSSP instance data.

static convert_fjs_to_csv(fjs_file, output_dir)

Converts a fjs file into three csv files, jobTasks.csv, machineRunSpeed.csv, and sequenceDependencyMatrix.csv, then it puts them in the output directory.

Parameters:
  • fjs_file (Path | str) – path to the fjs file containing a flexible job shop schedule problem instance
  • output_dir (Path | str) – path to the directory to place the csv files into
Returns:

None
get_job(job_id)

Gets the Job with job id = job_id.

Parameters:job_id (int) – id of the Job to get
Return type:Job
Returns:Job with id = job_id
get_runtime(job_id, task_id, machine)

Gets the run time for running (job_id, task_id) on machine.

Parameters:
  • job_id (int) – job id
  • task_id (int) – task id
  • machine (int) – id of machine
Return type:

float
Returns:

run time
get_setup_time(job1_id, job1_task_id, job2_id, job2_task_id)

Gets the setup time for scheduling (job2_id, job2_task_id) after (job1_id, job1_task_id).

Parameters:
  • job1_id (int) – job id of job 1
  • job1_task_id (int) – task id of job 1
  • job2_id (int) – job id of job 2
  • job2_task_id (int) – task id of job 2
Return type:

int
Returns:

setup time in minutes
job_task_index_matrix = None

2d nparray of (job, task): index mapping

jobs = None

list of all Job instances

machine_speeds = None

1d nparray of machine speeds

sequence_dependency_matrix = None

2d nparray of sequence dependency matrix

task_processing_times_matrix = None

2d nparray of task processing times on machines

usable_machines_matrix = None

2d nparray of usable machines

class JSSP.data.FJSData(input_file)

Bases: JSSP.data.Data

JSSP instance data class for .fjs (Flexible Job Shop) data.

Parameters:input_file (Path | str) – path to the fjs file to read the data from
Returns:None
class JSSP.data.Job(job_id)

Bases: object

Job ADT.

Parameters:job_id (int) – job ID of this Job
get_job_id()
get_max_sequence()
get_number_of_tasks()
get_task(task_id)
get_tasks()
set_max_sequence(max_sequence)
class JSSP.data.SpreadsheetData(seq_dep_matrix, machine_speeds, job_tasks)

Bases: JSSP.data.Data

JSSP instance data class for spreadsheet data.

Parameters:
  • seq_dep_matrix (Path | str | Dataframe) – path to the csv or xlsx file or a Dataframe containing the sequence dependency setup times
  • machine_speeds (Path | str | Dataframe) – path to the csv or xlsx file or a Dataframe containing all of the machine speeds
  • job_tasks (Path | str | Dataframe) – path to the csv or xlsx file or a Dataframe containing all of the job-tasks
Returns:

None
class JSSP.data.Task(job_id, task_id, sequence, usable_machines, pieces)

Bases: object

Task ADT.

Parameters:
  • job_id (int) – job ID of this Task
  • task_id (int) – task ID of this Task
  • sequence (int) – sequence number of this Task
  • usable_machines (1d nparray) – usable machines that this Task can be processed on
  • pieces (int) – number of pieces this Task has
get_job_id()
get_pieces()
get_sequence()
get_task_id()
get_usable_machines()