3. OPTIMIZATION OF MAINTENANCE PERIOD MODEL
Consider a vehicle in the design of which a certain
subsystem is used, and a periodic replacement is carried out as
a form of preventive maintenance.
The subsystem’s faults detected in service are corrected by
repair of the subsystem. In addition, the subsystem under
research undergoes a scheduled preventive maintenance
consisting of a simple checkout and setting-up. The aim of
optimization is to determine a period of replacement for the
subsystem so as to minimize the vehicle unit life cycle costs.
Let us assume that all necessary subsystem technicaleconomic
data are known.
The proposed optimization model disregards those
components of LCC which are not influenced by the
scheduled maintenance action and that cannot influence our
optimization. In this case, it is possible to express the total
LCC of the subsystem by: