Reworking in developing software exists widely in IT project management. But the current estimating methods on project duration cannot deal well with this problem. In this paper, some key concepts, such as adjusted activity, adjusted GERT network, expected project duration, expected critical path, are firstly defined. Then authors study estimating method on project duration for different rework...

The objective of this article is to analyze the effect of both target market and product complexity on the production activities in an industrial goods company of Brazil. Nine projects developed and manufactured by the company were monitored and their pertaining data collected, according to the planning of a factorial experiment involving two independent variables (target market and product com...

Closed-loop supply chains are characterized by the recovery of returned products. In most of these chains (e.g. glass, metal, paper, computers, copiers), used products (also known as cores) are returned by or collected from customers. But returned products can also come from production facilities within the supply chain (production defectives, by-products. In cases with internal returns, recove...

The current COVID-19 pandemic is making a huge impact on society. Most projects are either abandoned or halted due to this pandemic, especially in developing countries. We have conducted study evaluate the of construction by using concept rework projects. 'Rework project' class that initiated achieve intended objectives second attempt after failing goals first attempt. People who were involved ...

Meat inspection is up for debate and one issue deals with how to handle chronic cases of pyaemia/ osteomyelitis in finishing pigs. In Denmark, such carcasses are required to be de-boned to avoid presence of osteomyelitis not found in the rework area. Around 40,000 pigs (0.24%) are subjected to de-boning in Denmark per year, and the associated costs amount to approx. €3 million. The questions ar...

This paper uses an alternative approach to reexamine a prior study on joint determination of manufacturing lot-size and shipment policy in a vendor-buyer system with rework process and an improving delivery plan. The proposed method is a straightforward approach in terms of algebraic derivations. It is different from the conventional method that needs to apply the first-order and second-order d...