---------------------------------------------------------------ABSTRACT-----------------------------------------------------In this paper, an M/M/1 queueing system with server Start-up, N-Policy, breakdowns at two phases of service and Balking is analyzed. Customers arrive at the system according to a Poisson process. They receive the first phase service as a batch followed by second essential ...

Adding new lines of business and new services for existing customers is particularly important in deregulated telecommunication industry. Attracting new services to existing customers often translates into happier customers, increased retention of profitable customers, and competitive advantage. Identification of the most profitable customers (who are the most probable buyers of additional or n...

We have studied phase synchronization between two identical Rössler oscillators connected in the drive-response configuration by a single phase signal. Before the transition to phase synchronization, the distribution of the time interval between consecutive 2pi jumps shows several sharp peaks. With a strong phase signal coupling, the n:m phase synchronization between the oscillators can be achi...

In this paper, we consider a specific variant of the field service routing problem. It consists in determining vehicle routes in a single period to serve two types of customers: mandatory and optional. Mandatory customers have to be served within a specified time window whereas optional customers may be served (or not) within the planning horizon. For more realism, we assume that service as wel...

Identification and managing of variety of risks during the complete product design, development and delivery process are challenging. It covers the ‘product value stream’ in engineering projects including partners, suppliers, research and development, design and manufacturing, marketing, purchasing, service and support personnel and customers. This, coupled with the relationships that have deve...

We investigate the issue of predicting new customers as profitable based on information about existing customers in a business-to-business environment. In particular, we show how latent semantic concepts from textual information of existing customers’ websites can be used to uncover characteristics of websites of companies that will turn into profitable customers. Hence, the use of predictive a...

We investigate the issue of predicting new customers as profitable based on information about existing customers in a business-to-business environment. In particular, we show how latent semantic concepts from textual information of existing customers’ websites can be used to uncover characteristics of websites of companies that will turn into profitable customers. Hence, the use of predictive a...