The formula may look simple enough but ⦠Employment Cost Index for wages and salaries, for private industry workers, by occupational group and industry [Not seasonally adjusted] Occupational group and industry Index value (Dec. 2005=100) Percent changes for; Sep. 2019 Jun. However, if the aircraft is running late, the crew may use a CI of 50 or more which would give speeds of 320, .79 and 330 for the same phases. With time-related costs, the faster the aircraft is flown, the more money is saved in time costs. In a definition, cost index is a number used in the Flight Management System (FMS) to optimize an aircrafts speed. Airbus Flight Operations Support & Line Assistance - Getting to grips with the cost index (issue II - May 1998), Michael A. Burris - Cost Index Estimation by Boeing (August 2015), CAE Oxford ATPL book - Flight Performance and Planning. ⢠All else being equal, larger aircraft should have highest flight operating cost per hour, lowest unit cost per ASM: â There exist some clear economies of aircraft si ze (e.g., two pilots f or 100 and 400 seat aircraft, This jet fuel price index provides the latest price data from Platts. Cost Index Youâve probably heard the term being thrown around the forum or when reading or watching aviation related articles or videos. The value of the CI reflects the relative effects of fuel cost on overall trip cost as compared to time-related direct operating costs. The lower the CI, the more "importance" the machinery places on saving fuel. ⦠These costs are airline specific. For oceanic flying, a MN is assigned as part of the clearance. No matter who operates aircraft, large air company or small regional air club, everybody tries to reduce operation costs and therefore save money. But what is cost index, and how is it used in real world aviation. However, if the aircraft is flown at such a high speed, the fuel burn increases and total fuel cost for the trip increases. Flight with duration < 4 Hours:, A319 and A320 = Cost Index 27, B737-300 and B737-500 = Cost Index 45, B747-400 = Cost Index 90, B757-200 = Cost Index 80, B767-300 = Cost Index 65, B777-200 = Cost Index 85 Flights with duration > 4 Hours:, A319 and A320 = Cost Index 22, B737-300 and B737-500 = Cost Index 30, B747-400 = Cost Index 85, B757-200 = Cost Index 75, B767-300 = Cost Index ⦠Adding the time-related costs and fuel-related costs together produces a. FMC vendors use different mathematical expressions of CI. It is the MINIMUM TIME MODE for Maximum Speed (VMO/MMO). It quantifies choices concerning flying faster to recover delay, or flying slower to conserve fuel. Seasonally adjusted: Employment Cost Index for wages and salaries, by ownership, occupational group, and industry ; Table 3. Employment Cost Index Summary ; Employment Cost Index Technical Note ; Table 1. Increasing CI from zero to maximum will increase the ECON speed from the maximum range speed to maximum operating speed. But firstly we try to be as real as it gets and, secondly, it's a great fun to take all real world conditions into account. A low CI will affect the performance going more slowly as with a high CI, but resting the fuel cost. As an example, time-related costs contain the sum of several components: CI is used to take into account the relationship between fuel-related costs and time-related costs. http://mediawiki.ivao.aero/index.php?title=Cost_Index&oldid=7219, About IVAO - International Virtual Aviation Organisation. As the CI will vary from operator to operator and may also vary between flights of the same operator, the air traffic controller cannot assume that all aircraft of the same type will perform in the same fashion during any given phase of flight. Used appropriately, the CI feature of the flight management computer (FMC) can help airlines significantly reduce operating costs. In this case time cost as low as zero and fuel cost is extremely sufficient (greatest influence of fuel cost in the operating bill). COST INDEX Cost index (CI) is a number presenting the ratio of the time-related cost of an airplane operation and the cost of fuel. 2020 Sep. 2020 Sep. 2019 Jun. Knowledge of the airline cost structure and operating priorities is essential when aiming to optimize cost by trading increased trip fuel for reduced trip time or vice-versa. Description. The Cost Index is a parameter set in the cockpit, which determines how the FMS will fly the aircraft. Boeing (2007) cites that many operators do not take full advantage of this tool, although a Reality of aviation business requires a huge amount of factors to be considered on a daily basis: economics, marketing management, crew scheduling, flight operations, engineering and maintenance management, technical condition of aircraft etc. Cost Index (CI) is nothing new - most Flight Management System have been using it in some format for years. Flight with duration more than 4 Hours: MD-80= Cost Index 24, A319 and A32B= Cost Index 27, B737-800W= Cost Index 35, B757-200W= Cost Index 80, B767-300ER= Cost Index 65, B777-200ER= Cost Index 85, B777-300ER= Cost Index 90 Flights with duration less than 4 Hours: MD-80= Cost Index ⦠The Cost Index (CI) function of the Flight Management Computer (FMC) is an important and often misunderstood feature of a modern airliner. However, many operators donât take full advantage of this powerful tool. It will help to make flight planning more precise and accurate. The higher the cost index number, the faster the aircraft flies. Increasing Range of Speeds for Same Aircraft Type, Fuel Conservation Strategies: Cost Index Explained, Ryanair Cost Index Policy, effective 27 Oct 2012, https://www.skybrary.aero/index.php?title=Cost_Index&oldid=125197. Version 1.3 Download 16642 File Size 1,5 MB Create Date November 3, 2017 Download Download our latest Cost-Index Database for many different ⦠Read More[DOWNLOAD] Cost-Index Database | TOGA Projects CI is used to take into account the relationship between fuel-related costs and time-related costs. With time-related costs, the faster the aircraft is flown, the more money is saved in time costs. CI = MAX In this case fuel cost means nothing compared to the time cost. The cost per unit, or cost per flight hour, can be decreased with an increase in aircraft use. If you wish to contribute or participate in the discussions about articles you are invited to join SKYbrary as a registered user. It gives the ratio between the unit cost of time and the unit cost of fuel. COST INDEX DEFINED. This means airlines should have a thorough knowledge of costs in order to optimize operating economics. COST INDEX = COST OF TIME / COST OF FUEL Therefore CI is a kind of dimensionless coefficient showing the ratio of time cost to fuel cost. If you would like to help test or recommend changes to an aircraft profile, please contact me! CI = 0 It could be scaled from 0 to 999 or it is going from 0 to 99. This jet fuel price index provides the latest price data from the leading energy information provider Platts. This page was last edited on 20 July 2017, at 13:56. Cost Index (CI) is nothing new - most Flight Management System have been using it in some format for years. All around the world civil aviation is a part of market economy with rare exceptions. SimBrief's aircraft database is continually being improved. If he or she wants them to, an assigned speed must be given. I made two books for engineering students. The Federal Aviation Administration issued an order Wednesday that paved the way for the troubled Boeing 737 Max to carry passengers again, ending the jet's 20-month grounding. The CI is the ratio of the time-related cost of an airplane operation and the cost of fuel. In all cases, management must continually revise and update the actual costs, both fuel and time related, used in their calculations. The higher CI's will result in the opposite. Seasonally adjusted: Employment Cost Index for total compensation, by ownership, occupational group, and industry ; Table 2. Putting a high cost index means that you'll fly in the fastest way as possible, consuming more fuel. More sophisticated flight planning programs will show this change on a leg by leg basis and will file the speed change as part of the ATC flight plan. A quick video example of using a cost index to move costs from one year to another year. A given cost index will result in a specific still air True Airspeed at altitude - however, it is normal for the FMS to adjust the mach number (MN) by .01 when the head wind or tail wind components exceed a programmed threshold value - ie, the airplane will slow down with a tail wind, speed up with a headwind (automatically) by .01 mach in an effort to minimize the fuel burn. This documentation is copyrighted as part of the intellectual property of the International Virtual Aviation Organisation. Apart from real-world cost savings in fuel, differing CI values alter airspeeds used during the climb, cruise and descent phase of a flight. Low cost indexes will result in lower climb speed, (both indicated and mach), lower cruise speed, a generally higher cruise altitude, a later descent and a slower descent mach/speed. Overall, pilots like to say that they get more âbang for your buckâ when they fly more hours. The purpose of this research was to develop new ways of improving aircraft fuel efficiency, thus reducing overall operating costs in aviation for the Air Force. Basically, the company decides on the cost of keeping the aircraft in the air, and includes all sorts of costs such as crew, aircraft operating costs, fuel etc.. For example, one airline generally uses a CI of around 9 in the A320 which results in a climb speed of about 290, a cruise speed of about .76 and a descent speed of about 260. 2.1 Trip cost Used appropriately, the cost index (CI) feature of the flight management computer (FMC) can help airlines significantly reduce operating costs. As a matter of fact, this underlying idea had already been introduced with the Performance Data Computer (PDC), the predecessor of the Flight Management System (FMS). This is because the faster the aircraft is flown, the more miles can be flown for time-related components. CI is a simple and effective tool when it is appropriately used by an airline. With this number, and knowledge about the aircraft's performance, it is possible to calculate the optimal speed for the aircraft, which results in the lowest total cost. So, using the maximum CI is logically justified. The value of the CI reflects the relative effects of fuel cost on overall trip cost as compared to time-related direct operating costs. This is the single and only purpose of CI, keeping in mind that wrong utilization or wrong calculation of it leads inevitably to cost penalties. Currently a total of 128 aircraft types are available, a complete list can be found below. CI effectively provides a flexible tool to control fuel burn and trip time between these two extremes. It is the minimum fuel mode for the best range (MRC). Therefore CI is a kind of dimensionless coefficient showing the ratio of time cost to fuel cost. 19 of the use of cost index (CI) could be a valuable addition to this. Let's get through some typical CI examples. In this case, to maintain time based separation, the crew is MUST fly the mach assigned and the automatic speed adjustment should be disabled or overridden. The SimBrief dispatch system supports numerous different aircraft types. Cost index is a made up figure, which when input into the FMC is used to calculate ECON speed. 27 Used to estimate costs. 2020 Sep. 2020 3-months ended-12-months ended-Sep. 2019 Jun. COST INDEX DEFINED The CI is the ratio of the time-related cost of an airplane operation and the cost of fuel. 21 This has a direct impact on the CO2 emissions from the aircraft, with higher speeds resulting in higher 22 fuel consumption. Specifically, this research sought to answer the feasibility and benefits from using cost index flying. Table 9. 1. [Search] The lower the CI, the more "importance" the machinery places on saving fuel. The value of the CI reflects the relative effects of fuel cost on overall trip cost as compared to time-related direct operating costs. Generally, the total cost of a specific trip is the sum of fixed and variable costs: Since we can't affect the fixed cost, we need to minimize the variable cost (fuel- and time-related). the higher the aircraft gross weight, the higher the ECON Mach. Flying online we do not pay for fuel, so time becomes the only element important for each flight. There is great variation between operators on the CI that they use for a given type or in a given situation. Most ground based flight planning systems use some sort of cost reduction logic, but unless they have a proprietary cost index engine embeded in them, the true cost savings available are probably being missed. (MRC = Maximum Range Cruise; LRC = Long Range Cruise). By balancing time-dependent costs 20 with the cost of fuel, it controls the speed of the aircraft to achieve the most economic flight time. And the most effective way to take all these factors into account is to use the Cost Index (CI). Hourly Aircraft Rates: Aircraft Cost (w/o fuel) Estimated Fuel Cost: Estimated Total Cost Solo: Estimated Total Cost Dual: Cessna 172: $138: $36: $174: $245: Cessna 182RG: $138: $48: $186: $257: Diamond DA42NG: $326: $33: $359: $430: Decathlon: $150: ⦠Passenger Airline Cost Index (PACI) to monitor trends in the cost of inputs (e.g., labor, fuel, food, aircraft ownership, airport landing fees, insurance, utilities, interest) to the provision of air service over time. The range of allowable cost ⦠The content of this documentation is intended for aviation simulation only and must not be used for real aviation operations. For example, if you rent hangar space for $6,000 per year and fly your airplane 100 hours per year, your cost per hour for the hangar rental is $60. Graph and download economic data for Employment Cost Index: Wages and salaries for Private industry workers in Aircraft manufacturing (CIU2023211000000I) from Q1 2001 to Q3 2020 about aircraft, ECI, salaries, private industries, workers, wages, private, manufacturing, industry, and USA. 2. In essence, the cost index is used to take into account the relationship between fuel-and time-related costs. Speeds slower than the optimal speed will result in less fuel ⦠It also means that more miles can be flown between inspections when considering maintenance costs. VARIAbLE FUEL PRICES, FUEL TANKERING, ANd FUEL HEdGING MAKE THE COST INdEX CALCULATION COMPLICATEd. A4A produces the U.S. In addition to the above time-related costs, extra cost may arise from overtime, passenger dissatisfaction, hubbing or missed connections. Low cost indexes will result in lower climb speed, (both indicated and mach), lower cruise speed, a generally higher cruise altitude, a later descent and a slower descent mach/speed. The index and price data shows the global average price paid at ⦠The cost index is a number used in the Flight Management System (FMS) to optimize the aircraft's speed. Graph and download economic data for Employment Cost Index: Total compensation for Private industry workers in Aircraft manufacturing (CIU2013211000000I) from Q1 2001 to Q3 2020 about aircraft, ECI, compensation, private industries, workers, private, manufacturing, industry, and USA. Looking at the figure above you can see from the total operating cost curve that the speed which gives the minimum total operating cost is the most economical speed to fly. the higher the flight level, the higher the ECON Mach. The index and price data shows the global average price paid at the refinery for aviation jet fuel on the reported date. The ratio of fuel costs to all other costs. Regarding IVAO, it's clear that the CI concept is something left out of consideration.
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