To improve the accuracy and efficiency of task decomposition of R&D (Research and Development) projects, a new decomposition method based on product structure tree was proposed. The relevance between product structure tree and work breakdown structure (WBS) was analyzed through their natural quality and association relations. The mapping rules between product components and project tasks were d...

The Work Breakdown Structure (WBS) defines the work scope of a project. The way a WBS is defined depends on the person and his/her viewpoint. The aircraft modification business carries out a great variety of projects. Although the core skills and tasks are similar, there are very few projects that are exact repetition of previous work. The reuse of information is difficult without a good struct...

Many authors have analyzed queueing systems with server breakdowns. Kendall (1953) studied stochastic processes occurring in the theory of queues and their analysis by the method of imbedded Markov chains. Buzacott and Hanifin (1978) classified the machine failures as operation dependent failures and time dependent failures. Shanthikumar (1982) analyzed a M/G/1 queueing system with time and ope...

Modelsandanalyticaltechniquesaredevelopedtoevaluatetheperformanceoftwovariationsof singlebuffers(conventionalandbufferrelaxationsystem)multiplequeuessystem.Intheconventional system,eachqueuecanhaveatmostonecustomeratanytimeandnewlyarrivingcustomersfindthe bufferfullarelost.Inthebufferrelaxationsystem,thequeuebeingservedmayhavetwocusto...

At the beginning of World War II, Leonard Browne volunteered for service again, in the psychiatric work of the Army, and was amongst the first group of specialists to be called up. He earned a great reputation for solid reliability, and for imaginative ideas to improve morale and prevent breakdown. He had a big share in the pioneering of young soldier battalions, with their special arrangements...

The breakdown of the services into simpler services and the finding of elementary, concrete services will be supported by a tool. The tool will mainly take over the handling of the specifications for the services and the monitoring of the relationships between them. The structures discussed such as family. service group, team and process are still being created today by the developer using oper...

The present investigation deals with the performance prediction of finite Markovian retrial queues with unreliable server. The arrivals of the customers follow geometric distribution while the service pattern follows exponential distribution. The customers are served in two stages i.e. first essential service (FES) which is compulsory for all the arriving customers and second optional service (...

Live media services in mobile environments are fetching more essential with the explosion of technologies. Live Media streaming, in particular, is a promising technology for providing services such as live news clips, live sports. To avoid service interruption when the users keep moving, proper data management strategies must be engaged. In an earlier paper, the ideas and benefits of two-level ...

in this study, laser induced breakdown spectroscopy (libs) is used for qualitative analysis of healthy and carious teeth. the technique of laser ablation is receiving increasing attention for applications in dentistry, specifically for the treatment of teeth such as drilling of micro-holes and plaque removal. in the process of ablation a luminous micro-plasma is normally generated which may be ...