Modeling and solving the periodic maintenance problem.

We study the problem of scheduling maintenance services. Given is a set of m machines and integral cost-coefficients a(i) and b(i) for each machine i (1Branch-and-price; Column generation; Costs; Linear programming; Model; Models; Optimal; Scheduling; Structure; Studies; Time;

Advanced periodic maintenance scheduling methods for aircraft lifecycle management

This paper reviews existing methods and techniques addressing the problem of maintenance support throughout the life cycle for high value manufacturing products such as aircrafts. As part of this doctorate research the analysis of current methods of maintenance scheduling was conducted. In order to contribute to a more comprehensive solution, an advanced approach (algorithm) of periodic maintenance is presented. The authors believe that this approach will reduce the cost of maintenance of high value manufacturing products. The algorithm based on constraint programming methods is briefly presented and the future research directions are discussed

Portion Improvement of Vehicle Entry Units Through The Improvement of Express Periodic Maintenance Service Methods in Cars Workshop

This study aims to improve the specific periodic maintenance service method so that it can increase the unit entry portion per one working day in a workgroup in the car repair shop. The measurement using the standard time working group map used in the specific periodic maintenance service method before repairing was 44 minutes and 55 seconds with a total delay of 21 minutes and 10 seconds so that the unit entry portion was 9 units per one working day. The specific periodic maintenance service method that has undergone improvements results in an equal time between completing the work process at each vehicle position between technicians A and B and no delay time. So that the portion of the vehicle’s entry unit from before being repaired 9 units to 12 units after the repair done because the time needed to complete a periodic vehicle service work with the specific periodic maintenance service method becomes more efficient, namely 34 minutes. In other words, there an increase in entry units of 3 units or 33% per one working day for each working group.     Keywords: periodic maintenance, express, unit entry

Substations equipment inspection and periodic maintenance

In this article we analyse frequency, actions regarding preventive maintenance frequency and inspections that must be carried out when dealing with 60-800 kV equipment (insulators, circuit breakers, isolator switches, instrument transformers and surge arresters), in order to keep them working properly, within manufacturers’ instructions, and to avoid premature ageing of the equipment, namely busbar system and insulators, circuit breakers, isolator switches, instrument transformers and surge arresters

Substations equipment inspection and periodic maintenance

In this article we analyse frequency, actions regarding preventive maintenance frequency and inspections that must be carried out when dealing with 60-800 kV equipment (insulators, circuit breakers, isolator switches, instrument transformers and surge arresters), in order to keep them working properly, within manufacturers’ instructions, and to avoid premature ageing of the equipment, namely busbar system and insulators, circuit breakers, isolator switches, instrument transformers and surge arresters

Periodic Maintenance for On-Site Wastewater Treatment Systems

The key to preventing on-site wastewater treatment system problems is to follow a regular septic tank pumping schedule — every three to five years Septic tanks trap solids and floating materials and prevent them from entering the soil treatment field. After anaerobic bacterial action, these materials are converted into sludge and floating scum. Solids or scum that escape a septic tank plug soil pores and slow the soil\u27s acceptance rates of septic tank effluent and cause on-site systems to backup. Pumping septic tanks after backup problems occur only provides a short-term remedy, usually 2-3 days, until the tank refills with wastewater

Single-machine scheduling with periodic maintenance to minimize makespan

2006-2007 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptPublishe