The main objective of this paper is to examine the impacts of inspection times on the airline, as well as the overall economic optimality of current goals in terms of inspection times. The analyses are conducted by means of the combined use of discrete choice models to quantify passenger behavior after 9/11, a discrete event simulation of security screening operations to quantify the performanc...

We consider the determination of the optimal ne for noncompliance by a legislator who anticipates the inspection game between an autonomous inspection agency and polluting rms. This agency can make the inspection of individual rms contingent on ambient pollution. The agency's autonomy implies that it cannot commit itself to announced inspection probabilities. If the legislator centralizes the d...

A procedure for selecting an optimal NDI (non-destructive inspection) technique and associated schedule for fracture-critical member inspections on a specific steel bridge is presented. Information related to the probability of detection (POD) function (a measure of inspection quality) of alternative NDI techniques is utilized. Calculations based on use of the POD function together with Monte C...

The problem of container inspection at ports-of-entry is formulated in several different ways as an optimization problem. Data generated from different analytical methods, x-ray detectors, gamma-ray detectors and other sensors used for the detection of chemical, biological, radiological, nuclear, explosive, and other illicit agents are often relied upon to make critical decisions with regard to...

This paper deals with a condition-based maintenance policy for continuously degrading system to reduce the excessive environment degradation. This maintenance policy consists on maintaining the system with respect to a given threshold level of degradation. Such a level is measured by sequential inspections. According to statistical knowledge of degradation level, a preventive maintenance action...

There have been many analyses made of models for equipment inspection, i. e ., where a system may suffer a bre.akdowfl, ~ut such an event is only discovered by an inspection. Most analyses as· ~ume t~at the tIme to failure follows a negative exponential law which implies that only periodic mspectlOn programs need b~ considered. Another model which has been analyzed by Barlow, Hunter, and Prosch...

Lately, the method of thermography is becoming an unavoidable method in non-destructive testing of different metal materials and constructions. The application of this method is found in testing the energy efficiency, deterioration of structural components, as well as testing the energy efficiency of housing units. Using the thermographic method it is possible to reduce the negative environment...

Abstract The paper considers a sequential inspection policy in an imperfect production process which shifts randomly from an ‘in-control’ state to an ‘out-of-control’ state following a general probability distribution. Two different inspection policies are adopted in the proposed model: (i) no action is taken in the intermediate of a production run unless the process is found in an ‘out-of-cont...

The process industry is increasingly making use of Risk Based Inspection (RBI) techniques to develop cost and/or safety optimal inspection plans. This paper proposes an adaptive Bayesian decision model to determine these optimal inspection plans under uncertain deterioration. It uses the gamma stochastic process to model the corrosion damage mechanism and Bayes’ theorem to update prior knowledg...