Results 251 to 260 of about 816,920 (295)

Optimal Replacement Policies

1992
In Section 3.4.2 we considered a model for analysing the availability of units which are replaced under a preventive policy. The purpose of the maintenance policy is to increase the operating time of the units. Now, consider one unit (component) and suppose that the model analysed in Section 3.4.2 holds for all replacement timesT > 0.
openaire   +1 more source

Replacement Policies fro traffic control signals

IMA Journal of Management Mathematics, 1998
Summary: We discuss the application of two types of maintenance policy for multi-component systems to find good schedules for the replacement of lightbulbs in traffic control systems. Both types are based on the fact that in general many lamps function close together, implying that economies of scale can be obtained by combining replacements.
van der Duyn Schouten, F.A., van Vlijmen, S.F.M., Vos de Wael, S.L.E.   +2 more
openaire   +3 more sources

Inspection and replacement policies

Journal of Applied Probability, 1980
In this article we examine a breakdown model in which the system's status can be determined only by a test. Upon detection of failure the system must be replaced by a new identical one. The costs incurred include cost of inspection, operating costs, failure cost and a cost associated with planned replacements. Throughout the paper we restrict attention
openaire   +2 more sources

On Optimal Replacement Policies—Random Horizon

Operations Research, 1994
A system with a functional life of T units of time requires a certain functional part for its operation. If this part fails before the failure of the system, it has to be replaced immediately to keep the system in operation. Two brands are available for replacements. These two brands differ in unit costs and life distributions.
Banerjee, P. K., Kabadi, S. N.
openaire   +1 more source

Nearly Optimal Competitive Online Replacement Policies

Mathematics of Operations Research, 1997
This paper studies the online replacement problem. In this problem an online player is engaged at each time in one activity. Associated with each activity are a changeover cost and flow rate. While involved in an activity the player's budget is depleted at the activity's flow rate.
El-Yaniv, Ran, Karp, Richard M.
openaire   +1 more source

General adaptive replacement policies

Proceedings of the 4th international symposium on Memory management, 2004
We propose a general scheme for creating adaptive replacement policies with good performance and strong theoretical guarantees. Specifically, we show how to combine any two existing replacement policies so that the resulting policy provably can never perform worse than either of the original policies by more than a small factor. To show that our scheme
openaire   +1 more source

Random Periodic Replacement Policies

2014
When large and complex systems consist of many kinds of units, we should make minimal repair at each failure, and make the planned replacement or preventive maintenance at periodic times.
openaire   +1 more source

Comparisons of replacement policies

Journal of Applied Probability, 1988
For independent random lifelengths of the units in use stochastic comparisons of the number of failures and removal in [0,s] under age and block replacement policies are performed. A new concept of NBU (NWU) in sequence is introduced.
openaire   +2 more sources

Replacement Policies with Repairs

2017
In real situation, the damaged unit has probabilities of minor failures (or malfunctions) at shock times, in which case, minimal repairs that cost less are always considered to resume quickly the operation of unit.
Xufeng Zhao, Toshio Nakagawa
openaire   +1 more source

Are replacement last policies always better than replacement first policies?

IET Conference Proceedings, 2023
J. Wu, C. Qian, T. Dohi
openaire   +1 more source