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Questions and Answers
What is the basis for computing spare factors?
What is the basis for computing spare factors?
- Average sorties scheduled for the current month
- Unit historical data from previous similar flying months (correct)
- Unit historical data from the previous month
- Average sortie cancellations for the previous year
What is the minimum number of years of historical data required to compute spare factors?
What is the minimum number of years of historical data required to compute spare factors?
- 4 years (correct)
- 5 years
- 2 years
- 3 years
What is the formula for computing spare factors?
What is the formula for computing spare factors?
- Historical Sorties Flown divided by Historical Sorties Scheduled
- Historical First Sortie Cancellation divided by Historical Sorties Scheduled (correct)
- Historical Sorties Scheduled divided by Historical Sorties Flown
- Historical Sorties Scheduled divided by Historical First Sortie Cancellation
What type of factors do spare factors compensate for?
What type of factors do spare factors compensate for?
What are attrition factors used to compensate for?
What are attrition factors used to compensate for?
What type of data is used to develop attrition factors?
What type of data is used to develop attrition factors?
Who approves the use of attrition factors different from statistical attrition rates?
Who approves the use of attrition factors different from statistical attrition rates?
What is the primary purpose of computing attrition factors?
What is the primary purpose of computing attrition factors?
What is the formula for computing the attrition factor?
What is the formula for computing the attrition factor?
What is the purpose of weather attrition sorties?
What is the purpose of weather attrition sorties?
What happens when losses exceed attrition figures at the end of a quarter?
What happens when losses exceed attrition figures at the end of a quarter?
What is used to compute the attrition factor for a particular month?
What is used to compute the attrition factor for a particular month?
Who must approve the use of attrition factors different from statistical attrition rates?
Who must approve the use of attrition factors different from statistical attrition rates?
What is the purpose of adding attrition sorties to the monthly contract?
What is the purpose of adding attrition sorties to the monthly contract?
What happens to weather attrition sorties at the end of a month?
What happens to weather attrition sorties at the end of a month?
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Study Notes
Spare Factors
- Spare factors are based on projected first sortie logistics losses.
- First sortie is defined as a sortie flown by an aircraft that has not previously flown for the day, regardless of scheduled take-off time.
- Spare computation is based on unit historical data from previous similar flying months, using a minimum of 4 years historical data to ensure seasonal variations are included.
- The formula for computing spare factors is Historical First Sortie Cancellation divided by Historical Sorties Scheduled.
Attrition Factors
- Attrition factors are used to compensate for non-unit controlled factors, whereas spares are used to compensate for unit controlled factors.
- Attrition factors will be computed for and applied to each flying squadron/AMU.
- Attrition factors are computed using unit historical data from previous similar flying months, considering as much historical data as necessary to ensure seasonal variations are included.
- The formula for computing the attrition factor is Historical Sorties Lost divided by Historical Sorties Scheduled.
- Attrition factors represent a historical percentage of scheduled sorties lost to causes outside unit control.
Attrition Computation and Application
- Attrition will be computed monthly for the entire fiscal year by MMA.
- The monthly schedule will identify attrition sorties, and adjustments to the schedule should be made if attrition is less or more than planned.
- Attrition sorties are not substitutes for capability shortfalls, but are additive to the contract to ensure mission goals are met.
- A sortie lost will normally be flown in the week/month the loss occurred.
Weather Attrition
- Weather attrition sorties will only be used when sorties are lost because of weather.
- Weather attrition sorties will not be carried over into another month.
- The prorated weather attrition factor is computed by dividing the number of weather losses by the O&M days.
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