This paper considers periodic preventive maintenance policies for a deteriorating repairable
system. On each failure the system is repaired and, at the planned times, it is periodically …

Corrective maintenance (CM) is carried out to correct failures while preventive maintenance
(PM) is to avert failure. They both play an important role in asset management. Accurately …

In this paper, we study some preventive maintenance policies for coherent systems with n,
n⩾ 1, components. We consider a coherent system consisting of K, K⩾ 1, different types of …

In this paper some important properties of the generalized Pólya process are derived and
their applications are discussed. The generalized Pólya process is defined based on the …

A policy plan is proposed for the warranty length of a repairable system which consists of a
number of minimal repairs and duration of service. For this purpose, two total expected costs …

Natural decline in various mainstream oilfield reserves and the high investment capital in
upstream exploration and project development have promoted attention towards smaller …

The estimation of heart rate (HR) based on wearable devices is of interest in fitness.
Photoplethysmography (PPG) is a promising approach to estimate HR due to low cost; …

In a repairable system with multiple functionally interchangeable components, the
components may work in different environmental or operational stresses associated with …

We analyze the optimal replacement policy for a system subject to a general failure and
repair model. Failures can be of one of two types: catastrophic or minor. The former leads to …

This paper focuses on analyzing the cost behavior of a free-repair warranty (FRW) policy
with a preventive maintenance (PM) schedule for a complex product. We utilize a …