The market needs requires the Production Systems (PS) to offer a diversity of products, at shorten product life cycles, with cost and quality exigencies. It means PS have to support concurrent execution of production processes, to coordinate the shared resources according to each resource type management and operational strategies, and to deal with time varying set of processes. The control sys...

Current trends such as shorter product lifecycles, reduced time-to-market and mass-customization require new paradigms and approaches for production lines and machines. In the long term, production and manufacturing companies will only be able to survive in the face of increasing globalisation if they can react flexibly and quickly to changing customer and market demands. New paradigms and appr...

This paper examines several inventory replenishment policies for a make-to-order inventory–production system that consists of a production workshop and a warehouse. Demands arrive to the production workshop according to a Poisson process, and are processed in an FCFS manner. The production workshop requires that the warehouse provides, as needed, raw materials for use in the production process....

To manage the increasing dynamics inside and outside a production system, a decentralised and autonomous control of shop floor logistics is a promising approach. For developing and benchmarking such autonomous control methods, dynamic models are essential. The paper introduces the idea of autonomous logistic processes and presents a dynamic simulation model of a shop floor with both a conventio...

This chapter addresses three main problems of the production planning area: Single Machine Scheduling (SMS), Parallel Machine Scheduling (PMS) and Flowshop Scheduling (FS). Many situations in production environments found in industries around the world can be modelled as one or a set of them (Baker 1974). It is easy to find dozens of problem variants in the literature due to different productio...

The agro-silvopastoral system ‘montado’ is mostly dominated by Mediterranean evergreen oaks such as, cork oak (Quercus suber L.) and holm oak (Quercus rotundifolia). The ‘montado’ production system management aims the maintenance of a balanced sustainable land use to cope with the Mediterranean climate variability. One important issue in cork oak forests is the control shrub growth in order to ...

An extended economic production quantity (EPQ) model under stochastic demand is investigated in this paper, where a fixed lot sizing policy is implemented to reduce the complexity of production planning and inventory control, and outsourcing with a secondary facility is used to supplement the lot sizing policy and to cope with the random demand. The considered cost includes: setup cost for the ...

Product returns from market to the manufacturer can happen because of the motivation to capture the value content of the product after use or the obligation from legislation and the environmental concerns. A manufacturing system capable of integrating both the manufacturing and remanufacturing activities can help the recovery of value content in the products after the end of product’s use life....

In this paper we analyse congestion in TCP over ATM-UBR, in particular the association between the congestion measures at the ATM physical and TCP transport layers. Two new indicators, protocol level congestion association factor (PLCAF) and CLR-PRR correlation coefficient are used. ATM cell loss ratio (CLR) and TCP packet retransmission ratio (PRR) are good measures of congestion at their resp...