Surface Ship Demand-Based Policy Study.

摘要

This study evaluates alternative Selected Item Management (SIM)/Demand-Based Item (DBI) criteria using historical demand data and a computer simulation model. The alternatives are evaluated in terms of: (1) gross requisition effectiveness, (2) dollar investment in on-hand plus due-in stock and (3) volatility of the SIM/DBI stock battery. Volatility refers to the size of the SIM/DBI battery and to the rate of adds/deletes to the SIM battery. The study is based on historical demand data taken from six different types of ships; FF, DD, LST, AD, LPD, and AFS. The objective of this study is to evaluate various SIM/DBI qualifying and retention criteria and to determine which criteria best minimizes dollar investment without any loss of effectiveness. The SIM/DBI criteria of two demands in six months to qualify and one demand in six months to remain a part of the SIM/DBI stock record battery was considered the benchmark for this study. The SIM/DBI benchmark generally had the highest gross effectiveness, dollar investment, resupply orders, and volatility for each test ship. This study showed that there was no single policy which was best for all ships.