Naslov
Development and implementation of productivity norms for forwarders in Croatia

Autori
Stankić, Igor ; Poršinsky, Tomislav ; Tonković, Ivica ; Frntić, Marko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
44 th International Symposium on Forestry Mechanisation (FORMEC), Pushing the Boundaries with Research and Innovation in Forest Engineering / Stampfer, Karl - Graz : Beč : The University of Natural Resources and Life Sciences, Vienna (BOKU), 2011

Skup
44 th International Symposium on Forestry Mechanisation (FORMEC), Pushing the Boundaries with Research and Innovation in Forest Engineering

Mjesto i datum
Graz, Austrija, 09.10.2011. - 13.10.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
forwarder; productivity norms; planning; lowland forests; Croatia

Sažetak
In the area of Croatian lowland forests, forwarders aretypically used for extraction of timber assortments. Within the project, “Systematization of norms and standards for the production of the timber assortments”, which was financed by the state company "Hrvatske šume“ d.o.o., the process of development and implementation of new productivity norms for forwarders was carried out. Initially, for the execution of the research, it was necessary to gather data about technical characteristics of the most frequently used forwarders in Croatia, but also around the world. The morphological analysis, which was the basis for classification of forwarders into classes, was performed. Three classes of forwarders were obtained after cluster analysis and the most important factor appeared to be load capacity. Study of machine work was carried out on 30 research sites. The classic method of time study (snap-back chronometric technique) was used. During recording process, data of forwarding influential factors (stand and terrain conditions) were collected. After analysis of collected data, it was determined that forwarding productivity depends on class of the forwarder, average extraction distance, load characteristics, terrain and stand conditions. Regression analysis identified the time consumption of the individual work components, and productivity model for forwarding was developed. The obtained model was implemented into the application HsPPI. This is a part of information system developed by IT department of the state enterprise "Hrvatske šume“ d.o.o. and is used for production planning in timber harvesting. The system is based on dBase IV databases and two main program modules. The main parts of the system are: tree marking plan, assortment structure plan, production plan (felling, processing and extraction) and sales plan. Within a part of the production plan there is a module for calculating productivity norms for timber forwarding.

Izvorni jezik
Engleski

Znanstvena područja
Šumarstvo

POVEZANOST RADA