Multi-item Fixed Charged Solid Shipment Problem with Type-2 Fuzzy Variables

A multi-item fixed charged solid shipment model with criterion, e.g., shipment penalty, amounts, demands and carriages as type-2 triangular fuzzy variables with condition on few components and carriages is proposed here. With the critical value (CV) based contractions of corresponding type-2 fuzzy parameters, a nearest interval approximation model applying generalized credibility measure for the constraints is introduced for this particular model. An example is provided to explain the model and is then worked out by applying a gradient-based optimization—generalized reduced gradient technique (applying LINGO 16). The sensitivity analysis of the model is also given to illustrate the model.