Title

Revisiting Cost Index - The Challenge of Calculating a Precise Figure for Brazilian Airliners

Presenter Email

joaquim.dorey@acad.pucrs.br

Location

Mori Hosseini Student Union Events Center (Bldg #610) – Rooms 165 E/F

Start Date

3-4-2020 9:00 AM

End Date

3-4-2020 10:30 AM

Submission Type

Presentation

Topic Area

Other - please specify below

Other Topic Area

Fuel Conservation Strategies

Keywords

Cost Index, Brazilian Airliners, Influencers, Cost Index Calculation, Volatile, Performance, Economy

Abstract

Within numerous possibilities, Cost Index (CI) is the tool that can provide economic speeds and deliver the lowest cost for a given flight. Cost Index is a highly volatile number that shifts its optimum value in several different circumstances. Through the analysis of the Brazilian regulation, operation and infrastructure reality, this paper reviews several influencers that can interfere with the optimum CI value for a specific flight, aiming for maximum precision and economy. A structured questionnaire was submitted to pilots from four of the biggest Brazilian airliners operating under part 121. The purpose of this questionnaire was to investigate whether a shift in the influencers that altered the optimum CI would also shift the actual CI. Given that companies must cope with a number of constraints which create a gap between the optimum and actual CI, this work analyses the extension of such gap by observing the number of influencers considered on the CI calculations of Brazilian airliners and identifying reasons that prevent companies from taking full advantage of this powerful tool. Brazilian airlines struggle to deal with time costs influencers due to difficulties in obtaining and threating precise data, especially when there are small shifts on the optimum CI. Some aspects of CI calculation were overlooked due to cultural and economic aspects associated with the cost of jet fuel. It is yet to be determined witch tools and methods that increase CI precision will be economically viable to Brazilian airliners.

Presenter Biography

Joaquim d’Orey is a Brazilian Commercial Pilot and works as a Certified Flight Instructor at STS Flight School in Rio de Janeiro, Brazil. Joaquim holds a bachelor’s degree in Science in Aeronautics from Pontifical Catholic University of Rio Grande do Sul, where he was also part of the Center for Microgravity Research team and worked on developing and testing airfoils on wind tunnels.

Parallel to his activities as a CFI Joaquim is also a Jet Transition Instructor on a B737NG fixed base simulator at VOLO Flight Training. He previously was part in a course development team at an online aviation training platform, Mach Training, where he coordinated the development of an IFR Refreshment course.

Joaquim currently lives in Rio de Janeiro, Brazil.

View Joaquim d’Orey’s Bio Page

View Guilherme Amaral da Silveira’s Bio Page

Share

COinS
 
Mar 4th, 9:00 AM Mar 4th, 10:30 AM

Revisiting Cost Index - The Challenge of Calculating a Precise Figure for Brazilian Airliners

Mori Hosseini Student Union Events Center (Bldg #610) – Rooms 165 E/F

Within numerous possibilities, Cost Index (CI) is the tool that can provide economic speeds and deliver the lowest cost for a given flight. Cost Index is a highly volatile number that shifts its optimum value in several different circumstances. Through the analysis of the Brazilian regulation, operation and infrastructure reality, this paper reviews several influencers that can interfere with the optimum CI value for a specific flight, aiming for maximum precision and economy. A structured questionnaire was submitted to pilots from four of the biggest Brazilian airliners operating under part 121. The purpose of this questionnaire was to investigate whether a shift in the influencers that altered the optimum CI would also shift the actual CI. Given that companies must cope with a number of constraints which create a gap between the optimum and actual CI, this work analyses the extension of such gap by observing the number of influencers considered on the CI calculations of Brazilian airliners and identifying reasons that prevent companies from taking full advantage of this powerful tool. Brazilian airlines struggle to deal with time costs influencers due to difficulties in obtaining and threating precise data, especially when there are small shifts on the optimum CI. Some aspects of CI calculation were overlooked due to cultural and economic aspects associated with the cost of jet fuel. It is yet to be determined witch tools and methods that increase CI precision will be economically viable to Brazilian airliners.