With today’s technology embracing ever-smaller chip components, array packages with hidden solder joints, and numerous components on both sides of the printed circuit board assembly (PCBA), manual visual inspection is running out of steam to adequately address these challenges. AOI (automatic optical inspection) and/or AXI (automatic X-ray inspection) are starting to be used at a majority of to...

Following work of Stroud and Saeger, we investigate the formulation of the port of entry inspection algorithm problem as a problem of finding an optimal binary decision tree for an appropriate Boolean decision function. We report on an experimental analysis of the robustness of the conclusions of the Stroud-Saeger analysis and show that the optimal inspection strategy is remarkably insensitive ...

This research is derived an integrated model of economic production quantity, inspection and preventive maintenance to incorporate rework, minimal repair and inspection time for an imperfect production system. Some proportions of non-conforming items are assumed scrap before the rework process start and others are reworked. The rework process is imperfect that is a proportion of the reworked it...

Increased competition on the global market forces producers to follow policies leading to finite production runs. This situation requires implementation of a new type of inspection procedures with the aim to improve or sustain production quality levels. One of the most important aspects in the design of inspection processes is the specification of inspection intervals. This paper provides a sim...

In practice the items received in a lot may contain defective items, and the screening process to eliminate the defective items may involve both a Type I and a Type II error. Due to the defective items and the inspection errors, shortages may sometimes occur. In this paper, we develop an economic order quantity model with imperfect quality items, inspection errors, shortage backordering, and sa...

We consider a swarm-intelligent inspection system concerned with the inspection of blades in a jet turbine. The system is based on a swarm of autonomous, miniature robots, using only on-board, local sensors. We capture the dynamics of the system at a higher abstraction level using non-spatial, probabilistic, discrete-time macroscopic models, which we use in an optimal control framework to find ...

In this paper, an inspection strategy is proposed for systems subject to random shocks and whose state is only known through inspection. The shocksmagnitudes and times between shocks arrivals are random variables. Each shock induces an amount of damage to the system which is gradually weakened as damage accumulates. The system fails when the total damage exceeds some threshold level. The propos...

Optimal inspection and maintenance of complex systems in modern industry is important for safety and economic reasons. With appropriate statistical modelling, the utilisation of inspection resources and quality of inferences can be greatly improved. Modelling and inspection of a full-scale industrial furnace subject to corrosion is considered. A suitable Bayesian spatio-temporal dynamic linear ...

F many companies, inventory record inaccuracy is a major obstacle to achieving operational excellence. In this paper, we consider an inventory system in which inventory records are inaccurate. The manager makes inventory inspection and replenishment decisions at the beginning of each period. There is a cost associated with each inspection. If an inspection is performed, inventory records are al...