It was reported in the literature that the coefficients of variation of uptime and downtime of manufacturing equipment are often less than 1. This technical paper is intended to provide an analytical explanation of this phenomenon. Specifically, it shows that the distributions of uptime and downtime have the coefficients of variation less than 1 if the breakdown and repair rates are increasing ...

The evolution in precision manufacturing has resulted in the requirement to produce and maintain more accurate machine tools. This new requirement coupled with desire to reduce machine tool downtime places emphasis on the calibration procedure during which the machine’s capabilities are assessed. Machine tool downtime is significant for manufacturers because the machine will be unavailable for ...

IT Infrastructure Management and server downtime have been an area of exploration by researchers and industry experts, for over a decade. Despite the research on web server downtime, system failure and fault prediction, etc., there is a void in the field of IT Infrastructure Downtime Management. Downtime in an IT Infrastructure can cause enormous financial, reputational and relationship losses ...

This paper examines the relationship among disaster tolerant systems, Information Technology (IT) application operation and availability, and the executive level management visibility necessary for system operational success. The current state of disaster tolerant application systems is explored including an investigation into the reliability and survivability requirements necessary to achieve ...

Error mapping of machine tools is a multi-measurement task that is planned based on expert knowledge. There are no intelligent tools aiding the production of optimal measurement plans. In previous work, a method of intelligently constructing measurement plans demonstrated that it is feasible to optimise the plans either to reduce machine tool downtime or the estimated uncertainty of measurement...

Remus was the first system which implemented whole virtual machine replication to achieve high availability (HA). Recently a fast, lightweight migration mechanism (LLM) was proposed to reduce the long network delay in Remus. However, all these virtualized systems have the long downtime problem, which becomes a bottleneck to achieve HA. Based on LLM, in this paper we describe a fine-grained bloc...

The practice of restricting personnel entry to swine farms for extended periods of time following contact with other pigs (downtime) is a highly controversial subject throughout the global swine industry. For many years, downtime periods ranging from 48 to 96 hours have been enforced to reduce the risk of pathogen introduction to farms by personnel, despite a lack of data supporting these perio...