https://hal.archives-ouvertes.fr/hal-01620006/document

Simulation-optimisation based framework for Sales and Operations Planning taking into account new products opportunities in a co-production context

Sawmills are key elements of the forest product industry supply chain, and they play important economic, social, and environmental roles. Sawmill production planning and control are, however, challenging owing to several factors, including, but not limited to, the heterogeneity of the raw material. The emerging concept of digital twins introduced in the context of Industry 4.0 has generated high interest and has been studied in a variety of domains, including production planning and control. In this paper, we investigate the benefits digital twins would bring to the sawmill industry via a literature review on the wider subject of sawmill production planning and control. Opportunities facilitating their implementation, as well as ongoing challenges from both academic and industrial perspectives, are also studied.

Toward digital twins for sawmill production planning and control: benefits, opportunities, and challenges

Hardwood flooring mills transform rough wood into several boards of smaller dimensions. For each piece of raw material, the system tries to select the cutting pattern that will generate the greatest value, taking into account the characteristics of the raw material. However, it is often necessary to choose less profitable cutting patterns in order to respect market constraints. This reduces production value, but it is the price to pay in order to satisfy the market. We propose an approach to improve production value. We first use simulation on a training set of virtual boards in order to generate a database associating cutting patterns to expected production value. Then, we use an optimization model to generate a production schedule maximizing the expected production value while satisfying production constraints. The approach is evaluated using industrial data. This allows recovering approximately 30 % of the value lost when using the original system.

/pdf/improving-a-hardwood-flooring-cutting-system-through-4nx5td6qve.pdf

Improving a hardwood flooring cutting system through simulation and optimization

Carbon footprint of sawn timber products of Castanea sativa Mill. in the north of Spain

A microcomputer-based decision support system for the management of lumber mill production

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A microcomputer-based decision support system for the management of lumber mill production