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LETRIS: staffing service systems by means of simulation

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DOI: 
http://dx.doi.org/10.3926/jiem.219
Abstract (2. Language): 
Purpose: This paper introduces a procedure for solving the staffing problem in a service system (i.e., determining the number of servers for each staffing period). Design/methodology: The proposed algorithm combines the use of queueing theory to find an initial solution with the use of simulation to adjust the number of servers to meet previously specified target non-delay probabilities. The basic idea of the simulation phase of the procedure is to successively fix the number of servers from the first staffing period to the last, without backtracking. Findings: Under the assumptions that the number of servers is not upper-bounded and there are no abandonments and, therefore, no retrials, the procedure converges in a finite number of iterations, regardless of the distributions of arrivals and services, and requires a reasonable amount of computing time. Originality / value: The new procedure proposed in this paper is a systematic, robust way to find a good solution to a relevant problem in the field of service management and it is very easy to implement using no more than commonly accessible tools.
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REFERENCES

References: 

Brigandi, A., Dargon, D., Sheenan, M., Spencer III, T. (1994). AT&T’s call processing simulator (CAPS): operational design for inbound call centres. Interfaces, 24, 6-28. http://dx.doi.org/10.1287/inte.24.1.6
Corominas, A., Lusa, A., Muñoz, N. (2005). Cálculo de la capacidad necesaria para obtener un nivel de servicio predeterminado. Proceedings of the IX Congreso de Ingeniería de Organización, Gijón.
Dantzig, G.B. (1954). A comment on Edie’s “Traffic delays at toll booths. J. Opl. Res. Soc. of America. 2, 339-341.
Edie, L.C (1954). Traffic delays at toll booths. J. Opl. Res. Soc. of America. 2, 107-138.
Feldman, Z., Mandelbaum, A., Massey, W.A., Whitt, W. (2008). Staffing of time-varying queues to achieve time-stable performance. Mngt. Sci., 54, 324-338. http://dx.doi.org/10.1287/mnsc.1070.0821
Green, L.V., Kolesar, P.J. (1991). The pointwise stationary approximation for queues with nonstationary arrivals. Mngt. Sci., 37, 84-97. http://dx.doi.org/10.1287/mnsc.37.1.84
Green, L.V., Kolesar, P.J., Soares, J. (2001). Improving the SIPP approach for staffing service systems that have cyclic demands. Opns. Res., 49, 549-564. http://dx.doi.org/10.1287/opre.49.4.549.11228
Green, L.V., Kolesar, P.J., Soares, J. (2003). An improved heuristic for staffing telephone call centres with limited operating hours. Prod. and Opns. Mngt., 12, 46-61. http://dx.doi.org/10.1111/j.1937-5956.2003.tb00197.x
Green, L.V., Kolesar, P.J., Whitt, W. (2007). Coping with time-varying demand when setting staffing requirements for a service system. Prod. and Opns. Mngt., 16, 13-39. http://dx.doi.org/10.1111/j.1937-5956.2007.tb00164.x
Ingolfsson, A., Akhmetshina, E., Budge, S., Li, Y., Wu, X. (2007). A survey and experimental comparison of service level approximation methods for non-stationary M(t)/M/s(t) queueing systems with exhaustive discipline. INFORMS J. of Computing, 19(2), 201-214. http://dx.doi.org/10.1287/ijoc.1050.0157
Kwan, S.K., Davis, M.M., Greenwood, A.G. (1988). A simulation model for determining variable worker requirements in a service operation with time-dependent customer demand. Queueing Systems, 3, 265-276. http://dx.doi.org/10.1007/BF01161218
Journal of Industrial Engineering and Management – http://dx.doi.org/10.3926/jiem.219
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Muñoz, N. (2007). Consideración de aspectos aleatorios en la planificación del tiempo de trabajo con jornada anualizada. PhD thesis, Universitat Politècnica de Catalunya.
Stolletz, R. (2008). Approximation of the non-stationary M(t)/M(t)/c(t)-queue using stationary queueing models.: The stationary backlog-carryover approach. European J. of Opl. Res., 190(2), 478-493. http://dx.doi.org/10.1016/j.ejor.2007.06.036
Testik, M.C., Cochran, J.K., Runger, G.C. (2004). Adaptive server staffing in the presence of time-varying arrivals: a feed-forward control approach. J. Opl. Res. Soc., 55, 233-239. http://dx.doi.org/10.1057/palgrave.jors.2601677
Wagner, H.M. (1975). Principles of Operations Research, 2nd ed. Prentice-Hall.

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