Workforce Planning Model for the Parcel Sorting Area in a Mail Processing Center

우편집중국 소포구분 작업장 인력계측 수립모형

  • Park, Chul-Soon (Dept. of Industrial and Systems Engineering, Changwon National University) ;
  • Bae, Sung-Moon (Dept. of Industrial and Systems Engineering, Gyeongsang National University) ;
  • Cha, Byung-Chul (Postal Technology Research Center, ETRI) ;
  • Cha, Chun-Nam (Dept. of Industrial and Systems Engineering, Gyeongsang National University)
  • 박철순 (창원대학교 산업시스템공학과) ;
  • 배성문 (경상대학교 산업시스템공학부) ;
  • 차병철 (한국전자통신연구원 우정기술연구센터) ;
  • 차춘남 (경상대학교 산업시스템공학부)
  • Published : 2009.09.30

Abstract

Processing mail objects in a mail processing center involves several steps and operations, in particular dispatching as well as sorting by destination. The purpose of this paper is to present a model for the part-time worker staffing and allocation problem as it arises at the parcel sorting area in a mail processing center. The problem is formulated as a mixed integer linear program model to minimize the variable part-time workforce related cost. Hot only the characteristics of the sorting operations but also the dispatching requirements of the vehicles are reflected into the model. Six example problems with three different daily amounts of arriving mail are solved with LINGO to demonstrate the effectiveness of the 7-level induction option for the parcel sorting machine over the current 3-level one. The results indicate that measurable savings can be achieved by departing from current practice.

Keywords

References

  1. 부산우편집중국; 업무 프로세스 표준 매뉴얼, 부산우편집중국, 77-89, 2006
  2. 임상규, 차춘남; “Hub-spokes형 집중국망 운영에 따른 우편물 구분작업 인력절감 효과 분석”, 한국 SCM 학회지, 7(2) : 111-120, 2007
  3. 임재민, 김완석, 차춘남; “우편집중국 구분작업의 노동생산성 평가모형에 관한 연구”, 한국 SCM 학회지, 6(2) : 63-73, 2006
  4. 차병철, 김완석; “우편집중국 관할권역 조정 시뮬레이터 개발사례", IE Interfaces, 20(4) : 515-524, 2007
  5. Bard, J. F., Binici, C., and deSilva, A. H.; "Staff scheduling at the United States Postal Service," Computers and Operations Research, 30 : 745-771, 2003 https://doi.org/10.1016/S0305-0548(02)00048-5
  6. Judice, J., Martins, P., and Nunes, J.; "Workforce Planning in a lotsizing mail processing problem," Computers and Operations Research, 32 : 3031-3058, 2005 https://doi.org/10.1016/j.cor.2004.04.011
  7. Schrage, L.; Optimization modeling with LINGO, Lindo Systems Inc., 2003
  8. Qi, X., and Bard, J. F.; "Generating labor requirements and rosters for mail handlers using simulation and optimization," Computers and Operations Research, 33 : 2645-2666, 2006 https://doi.org/10.1016/j.cor.2005.02.022
  9. Zhang, X., and Bard, J. F.; "Equipment scheduling at mail processing and distribution centers," IIE Trans. on Scheduling and Logistics, 37(2) : 175-187, 2005 https://doi.org/10.1080/07408170590885657