Annals of Operations Research

, Volume 155, Issue 1, pp 5–23 | Cite as

Planning production and working time within an annualised hours scheme framework

  • Albert Corominas
  • Amaia LusaEmail author
  • Rafael Pastor


Production flexibility is essential for industrial companies that have to deal with seasonal demand. Human resources are one of the main sources of flexibility. Annualising working hours (i.e., the possibility of irregularly distributing the total number of working hours over the course of a year) is a tool that provides organisations with flexibility; it enables a firm to adapt production capacity to fluctuations in demand. However, it can involve a worsening of the staff working conditions. To take this into account, the planning and scheduling of working time should comply with constraints derived from the law or from a collective bargaining agreement. Thus, new and more difficult working-time and production planning and scheduling problems are arising. This paper proposes two mixed-integer linear program models for solving the problem of planning the production, the working hours and the holiday weeks of the members of a human team operating in a multi-product process in which products are perishable, demand can be deferred and temporary workers are hired to stand in for employees. The results of a computational experiment are presented.


Human resources Manpower planning Annualised hours Integer programming 


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  1. Azmat, C., & Widmer, M. (2004). A case study of single shift planning and scheduling under annualized hours: A simple three step approach. European Journal of Operational Research, 153(1), 148–175. CrossRefGoogle Scholar
  2. Azmat, C., Hürlimann, T., & Widmer, M. (2004). Mixed integer programming to schedule a single-shift workforce under annualized hours. Annals of Operation Research, 128, 199–215. CrossRefGoogle Scholar
  3. Chan, P., & Weil, G. (2002). Using multiple-level models to solve large-scale employee scheduling. Paper presented at European conference for artificial intelligence 2002, Lyon, France, 21–26 July 2002. Google Scholar
  4. Clutterbuck, D. (1982). After flexible hours, now it’s flexiyears. International Management, 37(3), 31–36. Google Scholar
  5. Corominas, A., Lusa, A., & Pastor, R. (2002). Using MILP to plan annualised hours. Journal of the Operational Research Society, 53(10), 1101–1108. CrossRefGoogle Scholar
  6. Corominas, A., Lusa, A., & Pastor, R. (2004a). Characteristics and classification of the annualised working hours planning problems. International Journal of Services Technology and Management, 5(5/6), 435–447. CrossRefGoogle Scholar
  7. Corominas, A., Lusa, A., & Pastor, R. (2004b). Planning annualised hours with a finite set of weekly working hours and joint holidays. Annals of Operations Research, 128, 217–233. CrossRefGoogle Scholar
  8. Corominas, A., Lusa, A., & Pastor, R. (2005). Annualised hours: a real flexibility tool. OR Insight, 18(1), 10–14. Google Scholar
  9. Corominas, A., Lusa, A., & Pastor, R. (2007). Using a MILP model to establish a framework for an annualised hours agreement. European Journal of Operational Research, 177(3), 1495–1506. CrossRefGoogle Scholar
  10. Curran, P. (1992). Annual hours brings productivity boost to spicers. Management Services, July, 32–33 Google Scholar
  11. Hung, R. (1999a). A multiple-shift workforce scheduling model under annualized hours. Naval Research Logistic, 46(6), 726–736. CrossRefGoogle Scholar
  12. Hung, R. (1999b). Scheduling a workforce under annualized hours. International Journal of Production Research, 37(11), 2419–2427. CrossRefGoogle Scholar
  13. Lynch, P. (1985). Annual Hours: an idea whose time has come. Personnel Management, 17 (November), 46–50. Google Scholar
  14. MacMeeking, J. (1995). Why Tesco’s new composite distribution needed annual hours. International Journal of Retail Distribution & Management, 23(9), 36–38. CrossRefGoogle Scholar
  15. Mazur, L. (1995). Coming: the annual workweeks. Across the Board, 32(4), 42–45. Google Scholar
  16. MES: Ministère de l’Emploi et de la Solidarité (2004)., France
  17. Vila, G. F. E., & Astorino, J. M. (2001). Annualized hours as a capacity planning tool in make-to-order or assemble-to-order environment: an agricultural implements company case. Production Planning & Control, 12(4), 388–398. CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Research Institute (IOC) / Engineering school (ETSEIB)Universitat Politècnica de Catalunya (UPC)BarcelonaSpain
  2. 2.Research Institute IOCBarcelonaSpain

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