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This technical report describes the F-15 programmed depot maintenance (PDM) process as performed at the Warner Robins Air Logistics Center (WR-ALC) in FYs 2004-2006. The average WR-ALC F-15 PDM visit runs behind schedule and lasts about four months. Also, PDM can wait a long time for parts; aircraft move through PDM steps out of sequence, with missing parts catching up with the aircraft when they become available, or cannibalize other aircraft.
Book Synopsis Insights on Aircraft Programmed Depot Maintenance by : Edward Geoffrey Keating
Download or read book Insights on Aircraft Programmed Depot Maintenance written by Edward Geoffrey Keating and published by Technical Report (RAND). This book was released on 2008 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: This technical report describes the F-15 programmed depot maintenance (PDM) process as performed at the Warner Robins Air Logistics Center (WR-ALC) in FYs 2004-2006. The average WR-ALC F-15 PDM visit runs behind schedule and lasts about four months. Also, PDM can wait a long time for parts; aircraft move through PDM steps out of sequence, with missing parts catching up with the aircraft when they become available, or cannibalize other aircraft.
This technical report describes the F-15 programmed depot maintenance (PDM) process as it was performed at the Warner Robins Air Logistics Center (WR-ALC) in the FY 2004 through FY 2006 time frame. The F-15 is an all-weather, extremely maneuverable tactical fighter designed to permit the Air Force to gain and maintain superiority in aerial combat. F-15s are on a 6-year PDM cycle (i.e., they are to return for PDM within 6 years of completion of a visit). WR-ALC has a sequential process that F-15s follow when undergoing PDM. Fuselage and wing work are, however, performed in parallel. The mean WR-ALC F-15 PDM visit completed in FY 2006 lasted 119.8 days. This total was down from 130.3 days in FY 2005 but similar to FY 2003 (123.1 days) and FY 2004 (117.5 days) mean durations. In FYs 2002 and 2003, the vast majority of WR-ALC F-15s completed PDM behind schedule. This problem was reduced in recent years, largely because planned durations became more realistic (i.e., longer). In FY 2006, the median F-15 was picked up 8 days after WR-ALC completed work. Pickup lags for F-15s based overseas are expected, because they are typically flown overseas in pairs to make more efficient use of aerial tanker refueling. However, even for continental United States (CONUS) based aircraft, it was not uncommon for operators to wait a week or more to retrieve their completed F-15s. There is considerable variation in how much time aircraft spend at specific steps or cells in the F-15 PDM process. WR-ALC is concerned about part issues. The PDM line does not have a particularly high priority, so it can wait considerable periods for parts. One symptom of and adaptation to part problems is "traveling work" (i.e., having an aircraft move forward through WR-ALC's cellular flow without all the tasks prescribed in a cell being completed). When the missing part is obtained, the part catches up with the aircraft and is installed. Another symptom of and adaptation to part problems is cannibalization.
Book Synopsis Insights on Aircraft Programmed Depot Maintenance: An Analysis of F-15 PDM. by :
Download or read book Insights on Aircraft Programmed Depot Maintenance: An Analysis of F-15 PDM. written by and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This technical report describes the F-15 programmed depot maintenance (PDM) process as it was performed at the Warner Robins Air Logistics Center (WR-ALC) in the FY 2004 through FY 2006 time frame. The F-15 is an all-weather, extremely maneuverable tactical fighter designed to permit the Air Force to gain and maintain superiority in aerial combat. F-15s are on a 6-year PDM cycle (i.e., they are to return for PDM within 6 years of completion of a visit). WR-ALC has a sequential process that F-15s follow when undergoing PDM. Fuselage and wing work are, however, performed in parallel. The mean WR-ALC F-15 PDM visit completed in FY 2006 lasted 119.8 days. This total was down from 130.3 days in FY 2005 but similar to FY 2003 (123.1 days) and FY 2004 (117.5 days) mean durations. In FYs 2002 and 2003, the vast majority of WR-ALC F-15s completed PDM behind schedule. This problem was reduced in recent years, largely because planned durations became more realistic (i.e., longer). In FY 2006, the median F-15 was picked up 8 days after WR-ALC completed work. Pickup lags for F-15s based overseas are expected, because they are typically flown overseas in pairs to make more efficient use of aerial tanker refueling. However, even for continental United States (CONUS) based aircraft, it was not uncommon for operators to wait a week or more to retrieve their completed F-15s. There is considerable variation in how much time aircraft spend at specific steps or cells in the F-15 PDM process. WR-ALC is concerned about part issues. The PDM line does not have a particularly high priority, so it can wait considerable periods for parts. One symptom of and adaptation to part problems is "traveling work" (i.e., having an aircraft move forward through WR-ALC's cellular flow without all the tasks prescribed in a cell being completed). When the missing part is obtained, the part catches up with the aircraft and is installed. Another symptom of and adaptation to part problems is cannibalization.
This monograph describes a model for evaluating the combined capacity of organic (U.S. Air Force owned and operated) and contractor maintenance assets to meet aircraft programmed depot maintenance (PDM) workloads. The PDM Capacity Assessment Tool (PDMCAT) forecasts the average number of aircraft that will be in PDM status each year over several decades, based on the initial number of aircraft in PDM status, the physical capacity of the facility or facilities (number of docks available for conducting PDM work), the PDM induction policy (the period allowed between the completion of one PDM and the start of the next), and the minimum hands-on flow time (the minimum time it would take a facility to complete a PDM if only one aircraft were in PDM status). While not directly part of the model, the derived induction data can be used to estimate both near- and long-term obligation authority requirements for different induction policies, labor rates, and workload forecasts. To illustrate the model's operations and capabilities, we applied the model to evaluate the U.S. Air Force's current capacity for supporting KC-135 PDM and examined several options for improving both near- and long-term availability. In the process, we discovered that, while future annual fleet costs increase and availability decreases with age and workload, they do so rather less rapidly because the aircraft induction rates (the number of aircraft inducted each year) decrease as the PDM flow time increases. This leads to a less-drastic cost and availability forecast than usual.
Book Synopsis Programmed Depot Maintenance Capacity Assessment Tool by : Elvira N. Loredo
Download or read book Programmed Depot Maintenance Capacity Assessment Tool written by Elvira N. Loredo and published by Rand Corporation. This book was released on 2007 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph describes a model for evaluating the combined capacity of organic (U.S. Air Force owned and operated) and contractor maintenance assets to meet aircraft programmed depot maintenance (PDM) workloads. The PDM Capacity Assessment Tool (PDMCAT) forecasts the average number of aircraft that will be in PDM status each year over several decades, based on the initial number of aircraft in PDM status, the physical capacity of the facility or facilities (number of docks available for conducting PDM work), the PDM induction policy (the period allowed between the completion of one PDM and the start of the next), and the minimum hands-on flow time (the minimum time it would take a facility to complete a PDM if only one aircraft were in PDM status). While not directly part of the model, the derived induction data can be used to estimate both near- and long-term obligation authority requirements for different induction policies, labor rates, and workload forecasts. To illustrate the model's operations and capabilities, we applied the model to evaluate the U.S. Air Force's current capacity for supporting KC-135 PDM and examined several options for improving both near- and long-term availability. In the process, we discovered that, while future annual fleet costs increase and availability decreases with age and workload, they do so rather less rapidly because the aircraft induction rates (the number of aircraft inducted each year) decrease as the PDM flow time increases. This leads to a less-drastic cost and availability forecast than usual.
RAND Project AIR FORCE'S long term interest in the topic of aging aircraft was rekindled in 1994, when we participated in the Air Force Scientific Advisory Board Summer Study that raised technical concerns about the viability of retaining certain aircraft past their original design lives. In 1997, the National Research Council's report on aging USAF aircraft reinforced those concerns. At that time, we initiated a modest Air Force sponsored research effort focused on emerging technical challenges for aircraft maintenance activities. Last summer we built on that technical background to examine the potential effects that aging aircraft would have on the costs of programmed depot maintenance (PDM) and engine support. The results of that work are documented in the annotated briefing that has been made available to the subcommittee. This year, we have broadened our review to cover other support and modernization activities where aircraft age may affect costs and readiness.
Book Synopsis Aging Aircraft: Implications for Programmed Depot Maintenance and Engine-Support Costs by :
Download or read book Aging Aircraft: Implications for Programmed Depot Maintenance and Engine-Support Costs written by and published by . This book was released on 1999 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: RAND Project AIR FORCE'S long term interest in the topic of aging aircraft was rekindled in 1994, when we participated in the Air Force Scientific Advisory Board Summer Study that raised technical concerns about the viability of retaining certain aircraft past their original design lives. In 1997, the National Research Council's report on aging USAF aircraft reinforced those concerns. At that time, we initiated a modest Air Force sponsored research effort focused on emerging technical challenges for aircraft maintenance activities. Last summer we built on that technical background to examine the potential effects that aging aircraft would have on the costs of programmed depot maintenance (PDM) and engine support. The results of that work are documented in the annotated briefing that has been made available to the subcommittee. This year, we have broadened our review to cover other support and modernization activities where aircraft age may affect costs and readiness.
Book Synopsis Aircraft Maintenance by : United States. General Accounting Office
Download or read book Aircraft Maintenance written by United States. General Accounting Office and published by . This book was released on 1990 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
RAND Project AIR FORCE'S long term interest in the topic of aging aircraft was rekindled in 1994, when we participated in the Air Force Scientific Advisory Board Summer Study that raised technical concerns about the viability of retaining certain aircraft past their original design lives. In 1997, the National Research Council's report on aging USAF aircraft reinforced those concerns. At that time, we initiated a modest Air Force sponsored research effort focused on emerging technical challenges for aircraft maintenance activities. Last summer we built on that technical background to examine the potential effects that aging aircraft would have on the costs of programmed depot maintenance (PDM) and engine support. The results of that work are documented in the annotated briefing that has been made available to the subcommittee. This year, we have broadened our review to cover other support and modernization activities where aircraft age may affect costs and readiness.
Book Synopsis Aging Aircraft: Implications for Programmed Depot Maintenance and Engine-Support Costs by : Raymond Pyles
Download or read book Aging Aircraft: Implications for Programmed Depot Maintenance and Engine-Support Costs written by Raymond Pyles and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: RAND Project AIR FORCE'S long term interest in the topic of aging aircraft was rekindled in 1994, when we participated in the Air Force Scientific Advisory Board Summer Study that raised technical concerns about the viability of retaining certain aircraft past their original design lives. In 1997, the National Research Council's report on aging USAF aircraft reinforced those concerns. At that time, we initiated a modest Air Force sponsored research effort focused on emerging technical challenges for aircraft maintenance activities. Last summer we built on that technical background to examine the potential effects that aging aircraft would have on the costs of programmed depot maintenance (PDM) and engine support. The results of that work are documented in the annotated briefing that has been made available to the subcommittee. This year, we have broadened our review to cover other support and modernization activities where aircraft age may affect costs and readiness.
This manual provides maintenance and maintenance management personnel with policies and procedures pertinent to maintenance management of aeronautical equipment. This manual applies to all elements of the Army including the Army National Guard, Army Reserve and contractors engaged in the operation, maintenance or storage of Army aircraft, aviation associated equipment and applicable components owned and managed by the Army.
Book Synopsis Aeronautical Equipment Maintenance Management Policies and Procedures by :
Download or read book Aeronautical Equipment Maintenance Management Policies and Procedures written by and published by . This book was released on 1988 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual provides maintenance and maintenance management personnel with policies and procedures pertinent to maintenance management of aeronautical equipment. This manual applies to all elements of the Army including the Army National Guard, Army Reserve and contractors engaged in the operation, maintenance or storage of Army aircraft, aviation associated equipment and applicable components owned and managed by the Army.
This investigation measures the productivity (efficiency) of the San Antonio Air Logistics Center, Aircraft Division between October 1983 to May 1985. This thesis consisted of developing a multiple input, multiple output Data Envelopment Analysis (DEA) model and a multiple input single output regression model to measure productive efficiency. The data base consisted of time series data drawing only from the Aircraft Division. The results of the DEA models showed the Aircraft Division to be 100 percent relative efficient during four of the 20 months studied as well as five out of the seven quarters. Extensive interpretations of the DEA results was restricted due to having data for only 20 months. The regression analysis only showed that perhaps total labor hours (direct labor hours + overtime hours) could be a predictor of total aircraft produced. No regression model for measuring productivity could be developed from the data due to the limited availability of data. Keywords: Maintenance management; Aircraft maintenance; Mathematical programming; Linear programming; Productivity.
Book Synopsis Measuring Productivity of Depot-Level Aircraft Maintenance in the Air Force Logistics Command by : Ralph W Lowry (III.)
Download or read book Measuring Productivity of Depot-Level Aircraft Maintenance in the Air Force Logistics Command written by Ralph W Lowry (III.) and published by . This book was released on 1985 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: This investigation measures the productivity (efficiency) of the San Antonio Air Logistics Center, Aircraft Division between October 1983 to May 1985. This thesis consisted of developing a multiple input, multiple output Data Envelopment Analysis (DEA) model and a multiple input single output regression model to measure productive efficiency. The data base consisted of time series data drawing only from the Aircraft Division. The results of the DEA models showed the Aircraft Division to be 100 percent relative efficient during four of the 20 months studied as well as five out of the seven quarters. Extensive interpretations of the DEA results was restricted due to having data for only 20 months. The regression analysis only showed that perhaps total labor hours (direct labor hours + overtime hours) could be a predictor of total aircraft produced. No regression model for measuring productivity could be developed from the data due to the limited availability of data. Keywords: Maintenance management; Aircraft maintenance; Mathematical programming; Linear programming; Productivity.
Book Synopsis C-130 Programmed Depot Maintenance by :
Download or read book C-130 Programmed Depot Maintenance written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
This research brief describes a new method -- the PDM Capacity Assessment Tool (PDMCAT) -- that estimates future PDM workloads using only minimal information from inside a facility.
Book Synopsis A New Tool Forecasts Programmed Depot Maintenance Workloads for Aging Aircraft by :
Download or read book A New Tool Forecasts Programmed Depot Maintenance Workloads for Aging Aircraft written by and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research brief describes a new method -- the PDM Capacity Assessment Tool (PDMCAT) -- that estimates future PDM workloads using only minimal information from inside a facility.
