Effect of the behavioral profile on operator performance in timber harvesting

Lopes, Eduardo da Silva; Pagnussat, Millana Bürger

doi:10.1080/14942119.2017.1328847

Cited by 16 publications

(7 citation statements)

References 5 publications

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“…The winding forest roads of varying widths and gradients together with uneven landing areas were most likely some of the reasons for the prolonged skidding times of AM. Lopes & Pagnussat (2017) pointed out that a lower performance rate was expected in the execution of the operation during the training period, as the operators were adapting to new environmental conditions and techniques required for quick decision and uninterrupted operation. Therefore the lacking availability of a professional operator (chainsaw and tractor) familiar with specifcs of timber harvesting operations in the Atlantic Forest was a major limitation of this factorial experiment.…”

Section: Discussionmentioning

confidence: 99%

Productivity assessment of timber harvesting techniques for supporting sustainable forest management of secondary Atlantic Forests in southern Brazil

et al. 2017

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Abstract. The Atlantic Forest in southern Brazil has been subject to overexploitation in the past prompting the formulation of a rigorous conservation orientated policy by the government including a strict ban of timber harvesting. In the region, the forestland is mostly owned by farmers. The economic value of the forest is rather limited for those farmers, because of the prohibition of commercial timber harvesting as a source of income. Sustainable forest management systems can offer great potential as new income opportunities for land holders, and further actively support the process of ecosystem rehabilitation and protection of these ecosystems. Yet, successful implementation of such sustainable management systems requires feasible and adapted timber harvesting systems. In order to develop such harvesting systems, a regional comparative case study was conducted at a typical smallholder forestry venture with the objective to analyze and evaluate harvesting methods supporting sustainable management of the Atlantic Forest. This study assessed production rates and associated costs of a common conventional timber harvesting method (CM) and a proposed alternative method (AM). CM was performed by a selected, typical forest landowner who had only basic training in chainsaw operations, but 20 years of experience at the wood yard of his small sawmill. In contrast, AM employed a professional chainsaw operator from the Amazon forest, trained and experienced in reduced impact logging techniques using state of the art equipment, supplemented by a snatch block and a skidding cone for improved extraction. Time study based models identified tree volume, winching distance and skidding distance to landing as the most significant independent variables affecting productivity. Total net productivity ranged from 4.9 m³ PMH 0 -1 for CM to 3.1 m³ PMH 0 -1 for AM. Corresponding gross-productivity ranged from 3.0 m³ SMH -1 to 1.9 m³ SMH -1 with an overall mean utilization rate of 60.8 % and 60.9 %, respectively for CM and AM. Associated harvesting costs ranged from 12.05 € m -3 to 20.94 € m -3 with an estimated annual production of 4000 m³ and 2700 m³, respectively. Although AM showed overall lower productivity and higher costs, it enabled important improvements in terms of occupational 204

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Section: Discussionmentioning

confidence: 99%

Productivity assessment of timber harvesting techniques for supporting sustainable forest management of secondary Atlantic Forests in southern Brazil

et al. 2017

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“…Therefore, it can be observed that individuals presented significant differences in preliminary motor skill assessment. As Lopes and Pagnussat (2017) argued, not all people have the same ability to perform forest machine operations, reinforcing the fact that individuals are different and do not have the same capabilities in a given function.…”

Section: Discussionmentioning

confidence: 99%

Bimanual Motor Skill in Recruitment of Forest Harvest Machine Operators

Pagnussat

Hauge

Lopes

et al. 2019

Croat. j. for. eng. (Online)

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The great complexity of the operation of wood harvesting machines and unpredictable differences of performance between operators must be reflected in the industry recruitment techniques. This work aimed to carry out an evaluation of the bimanual motor skill in candidates for the position of harvester operators using a virtual reality simulator to generate information that can contribute to and improve the selection process. The work was developed at the Forest Operators Training Center (CENFOR), at the State University of the Center–West, in Irati, PR. A sample of 12 individuals was studied and distributed into three levels of performance. The motor ability of the individuals was evaluated through the variables: »run time«, »fall direction«, and »cutting height«, assessed at different points during a 4-hour practice – 0.5; 1.0; 1.5; 2.0; 3.0 and 4.0 hours – practice in a virtual harvester simulator. The data were analyzed by variance and means, as well as compared to a Tukey test at the 5% level of significance. The individuals had a significant difference in the variables »run time« and »cutting height«, and could be accurately used to predict bimanual motor skill/performance. There was a significant gain in the performance of the operators up to 1.5 hours after the beginning of the skill test, and all those who demonstrated greater and lesser ability in the first half hour of the test maintained this behavior until the end of the training period. The virtual reality simulator can be used as a tool to assess bimanual motor skills during the selection of harvester operators.

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“…Pohon besar tetapi volume kayu kecil per ha merupakan masalah serius dalam penggunaan mesin pemanen kayu di hutan hujan (Castro et al 2016). Lopes & Pagnussat (2017) menunjukkan bahwa tingkat kinerja rendah karena operator beradaptasi dengan kondisi lingkungan baru dan teknik yang diperlukan untuk pengambilan keputusan yang cepat dan pengoperasian yang tidak terganggu.…”

Section: Produktivitas Penebanganunclassified

Mengurangi keterbukaan hutan melalui teknik pemananenan kayu yang tepat di hutan alam

Yuniawati

Tampubolon

2021

J. Ilmu Lingk.

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Kegiatan pemanenan kayu memberikan kontribusi yang sangat besar terhadap produksi kayu. Pohon produksi yang berada di dalam hutan tidak dapat dimanfaatkan jika tidak ditebang dan tidak dikeluarkan dari dalam hutan. Metode penelitian ini adalah membuat 6 plot contoh pengamatan (PCP) masing-masing 3 PCP untuk teknik perbaikan (TP) dan 3 PCP untuk teknik konvensional (TK) pada satu petak tebang, melakukan penebangan pohon dan penyaradan dengan TP dan TK, melakukan pengamatan dan pengukuran produktivitas pemanenan kayu dan luas areal hutan yang terbuka akibat penebangan dan penyaradan serta menganalisis pengaruh kedua teknik terhadap produktivitas areal hutan terbuka dengan uji t. Tujuan penelitian adalah untuk mengetahui pengaruh dua teknik pemanenan kayu terhadap produktivitas dan areal hutan terbuka. Hasil penelitian menunjukkan bahwa : 1) Rata-rata produktivitas penebangan dengan TK dan TP masing-masing adalah 10,60 m3/jam dan 13,95 m3/jam 2) Rata-rata produktivitas penyaradan dengan TK dan TP masing-masing adalah 7,25 m3/jam dan 9,60 m3/jam; 3) Rata-rata areal hutan terbuka akibat penebangan dengan TK dan TP masing-masing adalah 15,67% dan 7,43% ; 4) Rata-rata areal hutan terbuka akibat penyaradan dengan TK dan TP masing-masing adalah 10,50% dan 6,68%. Menerapkan teknik perbaikan dapat mengurangi terjadinya keterbukaan hutan pada penebangan dan penyaradan masing-masing sebesar 8,24% dan 3,82%.ABSTRACTTimber harvesting provides a very large contribution to timber production. Tree production that is in the forest can't be used if they are not felling and removed from the forest. This research method is to make 6 sample observation plot (SOP) each 3 SOP for improving technique (IT) and 3 SOP for conventional technique (CT) on one logging compartment, do felling and skidding by IT and CT, make observations, and measuring the productivity of timber harvesting and the area of open forest due to felling and skidding and analyzing the effect of the two techniques on the productivity of the open forest area with t-test. The research objective was to determine the effect of two timber harvesting techniques on productivity and open forest areas. The results showed that the average productivity of felling by CT and IT was 10.60 m3/hour and 13.95 m3/hour respectively. The average productivity of skidding by CT and IT was 7.25 m3/hour and 9.60 m3/hour respectively. The average open forest area due to felling by CT and IT was 15.6% and 7.43% respectively. The average open forest area due to skidding by CT and IT was 10.50% and 6.68% respectively. Applying improve technique reduced the open forest area through felling and skidding by 8.24% and 3.82% respectively.

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Effect of the behavioral profile on operator performance in timber harvesting

Cited by 16 publications

References 5 publications

Productivity assessment of timber harvesting techniques for supporting sustainable forest management of secondary Atlantic Forests in southern Brazil

Productivity assessment of timber harvesting techniques for supporting sustainable forest management of secondary Atlantic Forests in southern Brazil

Bimanual Motor Skill in Recruitment of Forest Harvest Machine Operators

Mengurangi keterbukaan hutan melalui teknik pemananenan kayu yang tepat di hutan alam

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