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Maintenance cost minimization via linear programming

Challenges

Linear programming model for workers’ schedule in order to minimize costs
Factors to be considered: workers’ skillset and level, deadlines, penalties, travelling time, internal and external worker cost
Processing a whole year’s data takes too much time and memory

Solution

  • MILP model in Python using CPLEX solver
  • The parameters and objective are based on the mathematical equivalent of the real-life rules, constraints and expectations
  • Geographically separated dataset allows reasonable runtime

Results

Optimal balance between internal and external operator employment.
Labor and travel cost minimization, lead time reduction.

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