An activity matrix (AM) shows the activities that transform an organization’s inputs into outputs. The inputs are the system targets and the materials, energy and other resources that are used to achieve these. The outputs are the system performance expressed in terms of production, quality,...

One of the celebrated extensions of the economic order/production quantity (EOQ/EPQ) model is one that assumes a received shipment contains a fraction of imperfect (non-conforming) quality items, where these items, detected by 100% screening, are sold as a single batch at a discounted price....

The paper describes a methodology to help systems analysts identify and prioritise an organisation's manufacturing and logistics problems and determine the changes that the organisation needs. The problems and associated investigations form the research and implementation agendas. The...

A vendor managed system with the Consignment Stock agreement is a business practice where a buyer׳s inventory remains the property of the vendor until its withdrawal by the final customer demand. Such an agreement has shown to be a profitable stock management approach, especially when operating...

The paper considers two research issues that usually interact in practice, which are the ‘VMI with consignment’ inventory policy and the ‘Learning Curve’. Under a VMI with consignment agreement, the vendor is the one who manages the buyer's inventory, and he holds the property of the...

Inventory management in reverse logistics has been receiving increasing attention in recent years. One of the inventory problems that has been of interest to researchers is the production, remanufacture (repair) and waste disposal model, where used items are collected and remanufactured to...

Wright's (1936) learning curve (WLC) depicts that the time required to accomplish a repetitive operation decreases with each subsequent repetition. The WLC model assumes that the components produced in an operation are all of perfect quality. On the other hand, in many production operations,...

This paper considers an inventory system within the economic order quantity (EOQ) model framework under random supply. The production process can go "out-of-control" with a constant probability and start producing imperfect quality items. Such a system has been studied in the literature under...