Towards better understanding of forestry-wood chain simulation through visualization and interactivity
2014 (English)Licentiate thesis, comprehensive summary (Other academic)
Simulation studies performed on the forestry-wood chain trend towards either complicated calculations on large data-sets, statistical exercises on endless production data, optimisations on specific sub domains, or a combination of the above. The studies are often presented through graphs showing how scalars such as value, profit, or yield fluctuate when parameters of the simulation model are tweaked.The simulation models are usually stringed together from a series of operations performed in various software packages, scripts, macros and purpose written code. Reusing code from past studies is common practise, either as part of the new program, or by simply running the data through an executable and parsing the results in the next operation. Since there is no framework built around the operations, changing the input data will often mean that you have to start again from the top, guiding the data through all the different steps manually. To make things worse; the simulation model, the experiment code, and the analysis code tend to be mixed together making validation and verification difficult.Keeping track of how each operation impacts the result is difficult, and understanding how different parameters interact with each other on a system-wide basis is hopeless.Despite already being complex, most studies omit important aspects of the system they are modelling. Processing time, stochastic behaviour, separation of experimental data from model data, and so on. At the same time, if the fidelity of the simulation models continue to increase, they will eventually become too unwieldy to comprehend.Despite this, simulation is one of the most important tools available when trying to improve the forestry-wood chain, and the results that have been produced through the use of simulation are awe-inspiring. With proper tools and methodology, the integrated simulation model of the forestry-wood chain is not far away.This document is an attempt at finding tools that help design understandable simulation models of the complex systems in the forestry-wood chain. The hypothesis is that visualisation and interactivity can give alternative feedback on simulation models, providing better foundations for decisions than scalar measures like profit or yield.
Place, publisher, year, edition, pages
Luleå tekniska universitet, 2014. , 69 p.
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757
Research subject Wood Products Engineering
IdentifiersURN: urn:nbn:se:ltu:diva-17162Local ID: 1f87a43d-3b66-4cd3-89a8-13e1243be0d8ISBN: 978-91-7583-153-4ISBN: 978-91-7583-154-1 (PDF)OAI: oai:DiVA.org:ltu-17162DiVA: diva2:990161
Godkänd; 2014; 20141017 (petbom); Nedanstående person kommer att hålla licentiatseminarium för avläggande av teknologie licentiatexamen. Namn: Peter Bomark Ämne: Träproduktutveckling/Wood Products Engineerings Uppsats: Towards Better Understanding of Forestry-Wood Chain Simulation Through Visualisation and Interactivity Examinator: Professor Olle Hagman Institutionen för teknikvetenskap och matematik Luleå Tekniska Universitet Diskutant: Teknologie doktor Johan Skog, SP Trä, Skellefteå Tid: Onsdag den 17 december 2014 kl 10.00 Plats: Hörsal A, Campus Skellefteå2016-09-292016-09-292016-10-19Bibliographically approved