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首页> 外文期刊>Industrial Engineering Letters >Learn by doing: Modelling the effect of training and job interruptions on tree cutting time for chainsaw operators in plantation forests, Tanzania
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Learn by doing: Modelling the effect of training and job interruptions on tree cutting time for chainsaw operators in plantation forests, Tanzania

机译：边做边学：为坦桑尼亚人工林的电锯操作员模拟培训和工作中断对砍树时间的影响

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Timber harvesting in Tanzania uses semi-mechanized and labour – intensive logging systems. Manual or semi-mechanized logging operations by using hand tools are more favoured due to cheap labour availability. For example, tree cutting is done manually using two-man crosscut saws, axes or chainsaws. This study was conducted at Sokoine University of Agriculture Training Forest to assess the effect of training and job interruptions for chainsaw operators during tree cutting operations in softwood plantation forests in Tanzania. Tree cutting operations using experienced and inexperienced chainsaw operators were studied in three experiments; before training, after training and after the break. Time study and work sampling techniques were used for data collection. Descriptive statistics and modeling was performed for each crews’ performance. Results show that generally, experienced crew spends lesser time in cutting as compared to inexperienced crews. However, start up chainsaw crew spent 32% higher time for preparation before tree felling. However, the crew showed significant improvement after training unlike the experienced one. The analysis of the delay times start up crew was had a significant proportion of the delay times during the first engagement which decreased substantially in the other two experiments. Generally, there was an improvement of the cutting time after training for all crew categories with decrease after the break. This observation signifies that job interruptions impact the productivity of the crews. Therefore, on job training on resumption of the operations may significantly improve crews’ productivity, safety as well as ensuring product quality. Key words: Tree cutting, training, chainsaws, time studies, Tanzania
机译：坦桑尼亚的木材采伐使用半机械化和劳动密集型伐木系统。由于廉价的劳动力，使用手动工具进行手动或半机械式的测井作业更为可取。例如，使用两人横切锯，斧头或链锯手动切割树木。这项研究是在索科因农业大学训练林进行的，目的是评估坦桑尼亚软木人工林砍伐树木过程中对链锯操作员的培训和工作中断的影响。在三个实验中研究了使用经验丰富和经验不足的电锯操作员进行的树木砍伐操作。训练前，训练后和休息后。时间研究和工作采样技术用于数据收集。对每个机组的表现进行描述性统计和建模。结果表明，与没有经验的工作人员相比，有经验的工作人员在切割上花费的时间更少。但是，启动链锯的工作人员在砍伐树木之前花费了32％的时间进行准备。但是，与经验丰富的船员不同，机组人员在训练后表现出明显的进步。延迟时间对启动人员的分析在第一次交战中有很大比例的延迟时间，而在其他两个实验中则大大减少。通常，对所有船员类别进行培训后，切割时间都有所改善，休息后有所减少。该观察结果表明工作中断会影响工作人员的生产率。因此，在进行恢复操作的在职培训可能会大大提高工作人员的生产率，安全性并确保产品质量。关键词：砍伐树木，培训，链锯，时间研究，坦桑尼亚

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