The current USAF process for establishing C-130 PDM intervals does not account for the wide range of aircraft variables within each aircraft MDS. This paper develops an analytical model that C-130 maintainers can use to forecast when a C-130 aircraft requires PDM. The model is based on five unique aircraft variables: 1) aircraft age, 2) total flying hours, 3) average yearly flying hours, 4) mission profile (expressed as a severity factors), and 5) operating location of the aircraft. Interviews with C-130 SPO personnel, combined with the use of the C-130 Service Life Data Base, provided the...