• Proceedings of the Korean Operations and Management Science Society Conference
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• 2004.05a
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• pp.115-118
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• 2004

Recently, mail center considers introducing the automatic mail sorting machine to improve the productivity of sorting process. This paper deals with the development of optimal process plan for the mail sorting machine. We suggest several alternatives and evaluate them throughout the process analyzing method.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.5
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• pp.1601-1607
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• 2010

This paper presents FMEA (Failure Mode Effect Analysis) for maintenance of mail sorting machine which is for automatic sorting of mail. We suggest the update method of regular diagnosis item and period for maintenance of mail sorting machine using the risk priority number which is calculated by severity, occurrence, and detection of failure mode of mail sorting machine, and shows FMEA adoption example of letter sorting machine. This paper also describes the current maintenance system and status of mail sorting machine in the domestic postal logistics environment, and FMEA adoption step. The proposed maintenance using FMEA will be adapted for more easy and efficiency maintenance of mail sorting machine.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.11
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• pp.3200-3206
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• 2009

This paper describes the problem of existing maintenance system for mail sorting machnies, and presents to-be considerations of maintenance system based on AHP (Analytic Hierarchy Process) analysis with efficiency and economic aspects. There are standard procedure for diagnosis and repair of mail sorting machine as preventive and operational maintenance, roles and missions of maintenance technical support center for upgrade of maintenance skill in this paper. The proposed maintenance system will be adapted for more safety and efficiency maintenance of mail sorting machine.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.32 no.3
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• pp.1-9
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• 2009

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.

• The KIPS Transactions:PartB
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• v.10B no.4
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• pp.429-442
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• 2003

In this paper, we describe an address image recognition system for automatic processing of standard- size letter mail. The inputs to the system are gray-level mail piece images and the outputs are delivery point codes with which a delivery sequence of carrier can be generated. The system includes five main modules; destination address block location, text line separation, character segmentation, character recognition and finally address interpretation. The destination address block is extracted on the basis of experimental knowledge and the line separation and character segmentation is done through the analysis of connected components and vortical runs. For recognizing characters, we developed MLP-based recognizers and dynamical programming technique for interpretation. Since each module has been implemented in an independent way, the system has a benefit that the optimization of each module is relatively easy. We have done the experiment with live mail piece images directly sampled from mail sorting machine in Yuseong post office. The experimental results prove the feasibility of our system.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10b
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• pp.496-498
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• 1998

현재 우편 처리용 바코드는 광학문자판독기에 의해 판독된 우편번호를 3 of 5 형광 바코드로 인쇄하고, 판독하여 우편물을 자동구분 처리하는 LSM(Letter Sorting Machine)을 사용하고 있다. 광학문자판독에 의한 인쇄체 문자 인식율은 94~96%정도로 처리되므로 오류 우편물의 최소화를 위하여 LSM에 형광 바코드와 동일한 체계로 구성된 흑색 바코드를 적용하고, 광학문자판독을 하지 않고도 우편물을 자동처리할 수 있는 체계를 구축하고 있다. 우편고객이 흑색 바코드를 우편물에 사전에 인쇄하여 접수하도록 하여 공학문자판독에 의한 처리 과정 축소함으로써, 보다 효과적인 우편 배달 서비스를 제공하기 위한 노력을 시도하고 있다. 본 논문에서는 우편 고객이 인쇄한 3 of 5 고객 바코드를 사전에 검사하여 우편물 자동처리를 보다 효과적으로 수행될 수 있도록 하기 위한 방법을 제고하는 고객 바코드 검증 시스템의 설계 및 구현에 대한 것이다.