In a sequential manufacturing process, a product unit proceeds through different manufacturing stages. At these stages, sensors monitor the features of the unit. In this work, the information produced by the sensors is employed to detect abrupt changes in process variables as well as to forecast their future behaviour. The developed algorithms were implemented as an on-line application to a man...

although lot streaming scheduling is an active research field, lot streaming flexible flow lines problems have received far less attention than classical flow shops. this paper deals with scheduling jobs in lot streaming flexible flow line problems. the paper mathematically formulates the problem by a mixed integer linear programming model. this model solves small instances to optimality. moreo...

At a Glance: This article describes a prototype of a discrete event simulator-Y4 (Yield Forecaster)-capable of simulating defect related yield loss as a function of time, for a multi-product IC manufacturing line. The methodology of estimating yield and cost is based on mimicking the operation and characteristics of a manufacturing line in the time domain. The effect of particles introduced dur...

In-line microscopy must keep up with the flow of manufacturing. At an inspection point, of which there are several in the process stream, a fraction of the wafers will be inspected, typically on the order of 20%. The fraction of wafers inspected depends on the maturity of the process, the complexity of the product, and the particular process step being monitored. State-of-the-art inline imaging...

Bolstered by significant productivity improvement in manufacturing technology, the construction paradigm has shifted toward industrialized construction methods, such as modular construction. Modular construction has benefitted from the long term development of the manufacturing technologies and core techniques used in the assembly production lines of construction prefabrication plants. Lean pro...

Jobs from a single Poisson input stream receive K independent stages of service, one at each stage in the pipeline. At stage i jobs are routed through one of the Ni available nodes, modelled as M/M/1 queues. These nodes are subject to random failure and repairs which leave their corresponding queues intact, but may affect the routeing of jobs arriving at that stage during the subsequent repair ...

In this paper, an in-process tracking system is proposed to track the status of semi-finished products and coordinate the manufacturing forces. Since its reliability and flexibility, RFID technique has shown big advantages than the conventional Bar-code systems, especially to automate of floor shop management. Based on this availability, RFID solutions are ideal for manufacturers who build seve...