Attrition and Spare Factor

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Questions and Answers

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?

4 years (correct)

5 years

2 years

3 years

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?

Unit controlled factors Signup and view all the answers

What are attrition factors used to compensate for?

Non-unit controlled factors Signup and view all the answers

What type of data is used to develop attrition factors?

Normal statistical applications Signup and view all the answers

Who approves the use of attrition factors different from statistical attrition rates?

MXG/CC Signup and view all the answers

What is the primary purpose of computing attrition factors?

To ensure mission goals are met Signup and view all the answers

What is the formula for computing the attrition factor?

Historical Sorties Lost divided by Historical Sorties Scheduled Signup and view all the answers

What is the purpose of weather attrition sorties?

To account for sorties lost due to weather Signup and view all the answers

What happens when losses exceed attrition figures at the end of a quarter?

The OG/CC or RQF/CC and MXG/CC will come to an agreement on how to correct the shortfall Signup and view all the answers

What is used to compute the attrition factor for a particular month?

Historical data from similar flying months in previous years Signup and view all the answers

Who must approve the use of attrition factors different from statistical attrition rates?

MXG/CC Signup and view all the answers

What is the purpose of adding attrition sorties to the monthly contract?

To ensure that mission goals are met Signup and view all the answers

What happens to weather attrition sorties at the end of a month?

They are not carried over into another month Signup and view all the answers

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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Description

This quiz covers the concept of spare factors in aviation, including the definition of first sortie and how spare computation is based on historical data from similar flying months. It also discusses the importance of using a minimum of 4 years of historical data to account for seasonal variations.