this paper seeks to understand the role of the cost of pollution from vehicles fuel in feasibility of cng national plan. optimal control theory is used with two target functions, one with and another without the cost of pollution. model results indicate the high importance of pollution cost in the project feasibility, in such a way that without consideration of that the project will be infeasib...

Cumulative Count of Conforming (CCC) charts are utilized for monitoring the quality characteristics in high-quality processes. Executive cost of control charts is a motivation for researchers to design them with the lowest cost. Usually in most researches, only one objective named cost function is minimized subject to statistical constraints, which is not effective method for economic-statistic...

abstract health economic evaluation research plays an important role in selecting cost-effective interventions. the purpose of this study was to assess the quality of published articles in iranian journals related to economic evaluation in health care programs based on drummond’s checklist in terms of numbers, features, and quality. in the present review study, published articles (persian and e...

one of the most important issues in the management of production is select the best option for each production activity, so that the time and cost of production is minimal and quality is the maximum. considering to the large number of activities and options for each activity, usually, this choice does not have a unique solution and can be used the utility function and assign weights to time, co...

the purpose of this article is to investigate a two-echelon supply chain inventory problem consisting of a single-vendor and a single-buyer with controllable lead time and investment for quality improvements. this paper presents an integrated vendor-buyer inventory model in order to minimize the sum of the ordering cost, holding cost, setup cost, investment for quality improvement and crashing ...

Time, cost and quality are considered as the main components in managing each project. Previous researches have mainly focused on the time-cost trade-off problems. Recently quality is considered as the most important factor in project�s success, which is influenced by time acceleration that is the less time is spent the more success is gained. In time-cost-quality trade-off problems, each act...

Quality has become part of the business strategy to increase competitive advantage. Companies that use quality as a strategic tool will have advantage over their competitors in controlling market. This research aims determine and obtain data on Total Management used regulating cost level design quality, so explain relationship influence between components costs also effect prevention, appraisal...

the conventional method towards deriving schedule for a fleet of ships to minimize cost alone has the short-coming of not addressing the problem of operation revenue losses associated with delays during maintenance at ships dockyards. in this paper, a preventive maintenance schedule for a fleet of ships that incorporates op-portunity cost is presented. the idea is to assign a penalty cost to al...