This thesis presents an overview of the Availability Centered Inventory Model (ACIM). Information and analyses are provided for the system and support hierarchies, rudimentary assumptions, and the maximum availability calculation envisioned by ACIM. A discussion on the procedures used to develop a LAMPS MK III helicopter availability-centered allowance list is presented. This allowance list is then used as a basis for for selection of LAMPS MK III Pack-up Kits (PUKs) . The PUKs selected are analyzed via the statistics provided by ACIM in its Statistical Summary Report. The objective of this analysis is to provide an understanding of some of the strengths and weaknesses of ACIM when it's used as a decision aid or analysis tool.http://archive.org/details/lampsmkiiipackup00mcdoLieutenant, United States NavyApproved for public release; distribution is unlimited.