Recommender systems (RSs) are an integral part of the online retail industry. They create
tremendous potentials for cross-selling, including increasing sales revenue, improving …

Performing a part of the service without the customer's presence is becoming an
increasingly common practice in many real-life service systems. This practice can generate …

In the manufacturing industry, timely order fulfilment from diverse customers is important for
operational profitability, given the constraints of limited production capacity. This paper …

Two main methods are used to solve continuous-time quasi birth-and-death processes:
matrix geometric (MG) and probability generating functions (PGFs). MG requires a numerical …

A 2-queue system with a single-server operating according to the combined 'Join the
Shortest Queue–Serve the Longest Queue'regime is analyzed. Both cases, with or without …

In this chapter, we discuss the advances of queues with variable service speeds. We start
with queueing models with vacation or setup time which are motivated from the optimization …

Cross-selling is a phenomenon in marketing which involves companies trying to sell their
customers additional things after they have already bought something. In this report, we will …