Service Capacity Reserve under Uncertainty by Hospital’s ER Analogies: A Practical Model for Car Services

Author:

Pérez Salaverría Miguel Ángel1,Mira McWilliams José Manuel2

Affiliation:

1. Jaguar Land Rover SLU, Torre Picasso, Plaza Pablo Ruiz Picasso 1, Planta 42, Complejo Azca, 28020 Madrid, Spain

2. Universidad Politécnica de Madrid, Avenida Ramiro de Maeztu 7, 28040 Madrid, Spain

Abstract

We define a capacity reserve model to dimension passenger car service installations according to the demographic distribution of the area to be serviced by using hospital’s emergency room analogies. Usually, service facilities are designed applying empirical methods, but customers arrive under uncertain conditions not included in the original estimations, and there is a gap between customer’s real demand and the service’s capacity. Our research establishes a valid methodology and covers the absence of recent researches and the lack of statistical techniques implementation, integrating demand uncertainty in a unique model built in stages by implementing ARIMA forecasting, queuing theory, and Monte Carlo simulation to optimize the service capacity and occupancy, minimizing the implicit cost of the capacity that must be reserved to service unexpected customers. Our model has proved to be a useful tool for optimal decision making under uncertainty integrating the prediction of the cost implicit in the reserve capacity to serve unexpected demand and defining a set of new process indicators, such us capacity, occupancy, and cost of capacity reserve never studied before. The new indicators are intended to optimize the service operation. This set of new indicators could be implemented in the information systems used in the passenger car services.

Publisher

Hindawi Limited

Subject

General Engineering,General Mathematics

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