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Comparison of Variance-to-Mean Ratio Methods for Reparables Inventory Management
Hardcover
Technology & EngineeringAviation
ISBN13: 9781025133263
Publisher: Hutson Street Press
Published: May 22 2025
Pages: 108
Weight: 0.73
Height: 0.31 Width: 6.14 Depth: 9.21
Language: English
In an effort to improve aircraft availability, this research compared the efficiency of ten methods of determining variance-to-mean ratios (VTMRs, VMRs, V/Ms) for repairable, spare aircraft parts known as reparables. These methods are base pipeline quantity, Hill-Stevens (220 LRUs), a variation of Hill-Stevens (10 1s), Hill-Stevens (230 LRUs), the Sherbrooke, a variation of Sherbrooke (10 1s), historical data, a new regression function, variance-to-mean ratio equals 1.00 or variance-to-mean ratio equals 1.01. Using VTMRs derived from quarterly organizational intermediate maintenance (OIM) demands for line-replaceable units (LRUs) from the D200A Secondary Item Requirement System (SIRS) databases in aircraft sustainability model scenarios and Excel spreadsheet simulation, this research concluded the VTMRs have an impact on aircraft availability and the cost of inventory.
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Comparison of Variance-to-Mean Ratio Methods for Reparables Inventory Management
Mahon, Lisa J.
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Mahon, Lisa J.
Comparison of Variance-to-Mean Ratio Methods for Reparables Inventory Management
Mahon, Lisa J.
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