scholarly journals Cockpit crew pairing Pareto optimisation in a budget airline

2022 ◽  
Vol 13 (1) ◽  
pp. 67-80 ◽  
Author(s):  
Parames Chutima ◽  
Nicha Krisanaphan
Keyword(s):  
Fuel Cost ◽  
Substantial Cost ◽  
Substantial Cost Saving ◽  
Cost Component ◽  
Airline Crew ◽  
Cost Minimisation ◽  
Crew Pairing ◽  
Differential Algorithm ◽  
Optimal Measurements ◽  
The Cost

Crew pairing is the primary cost checkpoint in airline crew scheduling. Because the crew cost comes second after the fuel cost, a substantial cost saving can be gained from effective crew pairing. In this paper, the cockpit crew pairing problem (CCPP) of a budget airline was studied. Unlike the conventional CCPP that focuses solely on the cost component, many more objectives deemed to be no less important than cost minimisation were also taken into consideration. The adaptive non-dominated sorting differential algorithm III (ANSDE III) was proposed to optimise the CCPP against many objectives simultaneously. The performance of ANSDE III was compared against the NSGA III, MOEA/D, and MODE algorithms under several Pareto optimal measurements, where ANSDE III outperformed the others in every metric.

scholarly journals Cost-benefit analysis of flight extended operations (ETOPS) for Garuda Indonesia airways

2018 ◽  
Vol 49 ◽  
pp. 02015
Author(s):  
Ratna Purwaningsih ◽  
Lakshita Pritandari ◽  
Haryo Santoso
Keyword(s):  
Travel Time ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Cost Structure ◽  
Benefit Analysis ◽  
Fuel Cost ◽  
Net Benefit ◽  
Cost Component ◽  
Direct Flight ◽  
The Cost

Garuda Indonesia reducing the flight cost used flight extended operations (ETOPS). ETOPS can reduce travel time and fuel consumption. The cost-benefit analysis was conducted to compare the flight between NON ETOPS flight and ETOPS flight Cengkareng - Perth - Cengkareng route. Net benefit of ETOPS flight is USD 1.212.863 and NON ETOPS is USD 1.154.894. Cost structure analysis was conducted to identify the percentage of flight cost component. The biggest percentage of cost was direct flight cost. It is equal to 49,53% for route Cengkareng - Perth NON-ETOPS and 47,70% for ETOPS. While for the route Perth Cengkareng NON-ETOPS and ETOPS have the same amount of 46.03%. Based on the results of the cost-benefit analysis, it is evident that the ETOPS flight can reduce the fuel cost, although the flight requires trained pilots. Contribution of the paper is brief describe on the structure of revenue and expenditure items in airways business. The structure is specific, different from other transportation business.

Airline Crew Pairing Optimization

2013 ◽  
pp. 1-22 ◽  
Author(s):  
Laurent Alfandari ◽  
Anass Nagih
Keyword(s):  
Airline Crew ◽  
Crew Pairing

Optimizing Cash Management for Large Scale Bank Operations

2010 ◽  
Vol 1 (2) ◽  
pp. 17-31
Author(s):  
Mark Frost ◽  
Jeff Kennington ◽  
Anusha Madhavan
Keyword(s):  
Federal Reserve ◽  
Large Scale ◽  
Programming Model ◽  
Cash Management ◽  
Cost Component ◽  
Time Space ◽  
Currency Management ◽  
The Cost ◽  
Reserve System ◽  
Computational Solution

The Federal Reserve System (Fed) provides currency services to banks, including sorting currency into fit and non-fit bills and repackaging bills for redistribution. To reduce the cost of currency management operations, many banks make Fed deposits and withdrawals of the same denomination each week. In July 2007, the Fed introduced fees for making both deposits and withdrawals during a given Monday through Friday. Recognizing an opportunity, Fiserv Corporation initiated a project to optimize bank vault inventories across time and space. This article presents the integer programming model developed to assist Fiserv clients reduce the logistics cost component of cash management. The model is implemented in software using OPL. The underlying configuration is a time-space multi-commodity network with a fixed-charge cost structure. The authors report on a successful pilot study and present an efficient heuristic procedure that can be used to reduce computational solution times from hours to a few minutes.

scholarly journals Evaluation of Strategies to Reduce the Cost Impacts of Flight Delays on Total Network Costs

Aerospace ◽  
2020 ◽  
Vol 7 (11) ◽  
pp. 165
Author(s):  
Judith Rosenow ◽  
Philipp Michling ◽  
Michael Schultz ◽  
Jörn Schönberger
Keyword(s):  
Trajectory Optimization ◽  
Economic Cost ◽  
Cost Driver ◽  
Cost Index ◽  
Flight Delays ◽  
Cost Component ◽  
Effective Strategies ◽  
Network Costs ◽  
The Cost ◽  
Hub Airport

Competitive price pressure and economic cost pressure constantly force airlines to improve their optimization strategies. Besides predictable operational costs, delay costs are a significant cost driver for airlines. Especially reactionary delay costs can endanger the profitability of such a company. These time-dependent costs depend on the number of sensitive transfer passengers. This cost component is represented by the number of missed flights and the connectivity of onward flights, i.e., the offer of alternative flight connections. The airline has several options to compensate for reactionary delays, for example, by increasing cruising speeds, shortening turnaround times, rebookings and cancellations. The effects of these options on the cost balance of airline total operating costs have been examined in detail, considering a flight-specific number of transfer passengers. The results have been applied to a 24-h rotation schedule of a large German hub airport. We found, that the fast turnaround and increasing cruise speed are the most effective strategies to compensate for passenger-specific delay costs. The results could be used in a multi-criteria trajectory optimization to find a balance between environmentally-driven and cost-index-driven detours and speed adjustments.

scholarly journals The Calculation of the Fuel Cost for a Car

2018 ◽  
Vol 47 (4) ◽  
pp. 277-282 ◽  
Author(s):  
Radik Ildarkhanov
Keyword(s):  
Fuel Consumption ◽  
Test Results ◽  
Fuel Cost ◽  
Average Speed ◽  
Vehicle Weight ◽  
The Cost ◽  
New Formula ◽  
Physical Phenomena

The proposed formula derived considering the physical phenomena which occur during truck operation makes it possible to calculate fuel cost during the operation more accurately. The results of comparison of calculations by the proposed formula with test results tractors parties “TransEuroTest” are presented. The results of the calculation with the help of new formula differ from the experimentally obtained values of the fuel consumption of vehicles for not more than 1%. The average fuel consumption of tractors at an average speed is shown. The proposed formula for calculating the cost makes it easy to compare the fuel consumption of different vehicle options. The formula can also be used when evaluating the effect of vehicle weight on fuel consumption, which is impossible according to the well-known formulas.

Health economics and health promotion

2018 ◽  
pp. 113-140
Author(s):  
Colin Palfrey
Keyword(s):  
Health Promotion ◽  
Cost Effectiveness ◽  
Health Economics ◽  
Conjoint Analysis ◽  
Cost Benefit ◽  
Cost Utility ◽  
Value For Money ◽  
Cost Minimisation ◽  
The Cost

This chapter examines the techniques used by health economists to evaluate the value for money of health promotion initiatives. It first provides an overview of concepts related to economics and health economics, including efficiency, equality, equity and accessibility. Efficiency can be evaluated in terms of cost-minimisation, cost-effectiveness, cost-benefit and cost-utility. The chapter then considers the various rationing strategies by which the NHS can try to reduce expenditure, the use of QALYs to compare the cost-effectiveness of health promotion projects, and conjoint analysis. It also explains how health economists calculate the cost to society of unhealthy lifestyles such as obesity and smoking, and goes on to tackle the question of prevention vs cure in health promotion, the expenditure on the NHS, and the limitations of health economics in evaluation of health promotion endeavours. The chapter concludes with an assessment of how to estimate the costs of health promotion.

On Large-Scale Airline Crew Pairing Generation

2018 ◽  
Author(s):  
Divyam Aggarwal ◽  
Dhish Kumar Saxena ◽  
Michael Emmerich ◽  
Saaju Paulose
Keyword(s):  
Large Scale ◽  
Airline Crew ◽  
Crew Pairing

scholarly journals Cost prediction model based on system dynamics in water resource project

2019 ◽  
Vol 258 ◽  
pp. 02027
Author(s):  
Hirijanto ◽  
I Wayan Mundra ◽  
Addy Utomo
Keyword(s):  
Prediction Model ◽  
Cost Estimation ◽  
Construction Projects ◽  
Model Simulation ◽  
Secondary Data ◽  
System Dynamic ◽  
Cost Prediction ◽  
Cost Component ◽  
The Government ◽  
The Cost

Project’s cost is one of important components in project achievement. Because of the uniqueness of construction projects, cost estimation always differs from project to project. The rate of cost components always change over time make difficult to forecast the cost for the upcoming project. The cost component consists of many influencing variables where there is interrelationship each other affecting to the total project cost. This paper objective is to develop a cost prediction model to assist the project planners in cost estimation for future projects. System dynamic is one of the appropriate methods to analyse system behaviour with interrelationship referring to the historic data, so it is able to predict the future project. Developing the model, primary and secondary data are collected from previous studies, interview with the government planner and survey in Malang Regency. The model simulation is Brick work unit with its components. Data from last thirteen years are used to verify and validate the developed model by causal loop diagram as a basic method in system dynamic. The finding showed that the model is closed to real condition through the validation mechanism. The developed system is useful in decision making of budget planning based on work quantity.

Experience With Gas Path Analysis for On-Wing Turbofan Condition Monitoring

2013 ◽  
Vol 136 (1) ◽  
Author(s):  
Michel L. Verbist ◽  
Wilfried P. J. Visser ◽  
Jos P. van Buijtenen
Keyword(s):  
Path Analysis ◽  
Condition Monitoring ◽  
Operating Conditions ◽  
Performance Data ◽  
Test Rig ◽  
Substantial Cost ◽  
Substantial Cost Saving ◽  
Turbofan Engine ◽  
Monitoring Information

Gas path analysis (GPA) is an effective method for determination of turbofan component condition from measured performance parameters. GPA is widely applied on engine test rig data to isolate components responsible for performance problems, thereby offering substantial cost saving potential. Additional benefits can be obtained from the application of GPA to on-wing engine data. This paper describes the experience with model-based GPA on large volumes of on-wing measured performance data. Critical is the minimization of the GPA results uncertainty in order to maintain reliable diagnostics and condition monitoring information. This is especially challenging given the variable in-flight operating conditions and limited on-wing sensor accuracy. The uncertainty effects can be mitigated by statistical analysis and filtering and postprocessing of the large datasets. By analyzing correlations between measured performance data trends and estimated component condition trends errors can be isolated from the GPA results. The various methods assessed are described and results are demonstrated in a number of case studies on a large turbofan engine fleet.

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