Aiming at the problems of high equipment composition complexity, long idle time machines, and difficulty in online optimization energy consumption production system that adopts “immediate rework” mechanism, an method for rework systems is proposed. A digital model mechanism established, real-time data integrated to realize based on optimal buffer threshold. Taking module line a battery workshop...

In traditional inventory models such as the economic order quantity (EOQ) and the economic production quantity (EPQ) the sole objective is to minimize the total inventory-related costs, typically holding cost and ordering cost. These models do not consider the presence of defective products in the lot or rework of them. Recently, Jamal, Sarker, and Mondal (Jamal, A. A. M., Sarker, B. R., & Mond...

A common requirement on future safety-critical systems is to support hardware interchangeability. In this paper, work sponsored by British Aerospace Military Aircraft and Aerostructures is reported which addresses this issue. Interchangeability is motivated by the need to perform technology upgrades within a system when components become obsolete – hardware computer components are often superse...

Objective To examine the relation between childhood adversity, the role of school performance, and childhood psychopathology and the risk of suicide.Design Cohort study of register based indicators of childhood adversity (at ages 0-14) including death in the family (suicide analysed separately), parental substance abuse, parental psychiatric disorder, substantial parental criminality, parental ...

This paper aims to review the current practice in cost engineering, identify the scientific research challengesand suggest future direction of this area research. It has been developed based on both the outputs from the academic forum of cost engineering at Cranfield University in the UK and the state of art on cost engineering research. The promising future research subjects in Cost Engineerin...

Product defects and rework efforts due to flawed specifications represent major issues for a project’s performance, so that there is a high motivation for providing effective means that assist designers in assessing and ensuring a specification’s quality. Recent research in the context of formal specifications, e.g. on coverage and vacuity, offers important means to tackle related issues. In th...

The point of this note is to explain the ideas in the above research paper without using any mathematics or technical jargon (the original paper contains both). The intended reader is someone who is interested in economics and finance but who is not an academic researcher. I welcome your comments on the ideas below, whether you agree with them or not; and also on the write-up itself -for exampl...