A research report submitted to the Faculty of Arts, University of the Witwatersrand, Johannesburg, in partial fulfillment of the requirements for the degree ot Master of Arts in Industrial Social Work by course work, 1998 / This study explored the effects of perceived trade union social support on the work stress of blue collar workers. It was hypothesised that blue collar workers who obtain social support from their trade union would experience the least stress. This study is a comparative qualitative study. The sample involved 60 blue collar workers in a Telkom workshop. The role orientation questionnaire was used to test their stress levels and thereafter the trade union social support scale was used to test their levels of perceived trade union social support study revealed that blue collar workers are indeed exposed to stress, however, those that perceived the trade union as giving them social support, experienced the least stress. On the basis of the findings it is recommended that occupational social workers intervene on micro, meso and macro levels in order to help in alleviating the stress levels of blue collar workers. / AC2017

Background: In South Africa, limited research has focused on the task demands and workers responses associated with forestry silviculture work, particularly pitting and planting. The methods currently in use are manual, but despite our lack of understanding of the existing demands, advances in forestry engineering have resulted in an introduction of semi-mechanised versions of these tasks. This project aimed to compare the task demands of silviculture tasks using the current manual techniques and the more modern, semi-mechanised techniques. Methods: A holistic investigation focused on the worker characteristics of a sample of black male pitters and black female planters from the Kwa-Zulu Natal forestry industry, as well as biomechanical (spinal kinematics and L5/S1 forces), physiological (heart rate, oxygen consumption and energy expenditure) and psychophysical (ratings of perceived exertion and body discomfort) responses associated with manual and semi-mechanised pitting and planting. Results: The pitting task saw significant improvements in the spinal kinematic measures as a result of the increased mechanisation, with eight of the 16 recorded variables decreasing to a lower level of risk classification. Physiologically, the manual task was associated with a mean heart rate of 157 bt.min⁻¹ and absolute energy expenditure of 11.27 kcal.min⁻¹, which were not found to be significantly different to the values of 143 bt.min⁻¹ and 9.8 kcal.min⁻¹ recorded during the semi-mechanised technique. Psychophysical responses indicated that the workers perceived manual pitting to be more physically demanding than the semi-mechanised method. The manual and semi-mechanised planting tasks were, in general, found to be acceptable from a spinal kinematics perspective, with the majority of variables classified as low risk. However, the maximum sagittal angle was reduced by more than 20 degrees as a result of the new equipment. The physiological and psychophysical demands associated with manual planting were found to be within acceptable limits. Conclusion: In terms of pitting, it can tentatively be concluded that the semi-mechanised technique is better than the manual one, based on the biomechanical and psychophysical findings, however physiological demands require further investigation. When considering the planting techniques, the semi-mechanised method showed a slight improvement from the biomechanical perspective, but further physiological and psychophysical investigations are needed.

Globally organisations face unacceptable levels of fatalities that translate into financial losses and bad publicity, which can be attributed to the inadequate employee engagement in decision making in daily work activities. This study explores the participative role of employees in the management of occupational health and safety (OHS), and investigates the impact of employee participation on the decision making processes that create a safe workplace. The joint labour-management committees encourage employee participation that improves the injury and disease prevention programs. Four participative approaches exist in the decision making processes, namely Directed Participation, Involvement, Pro-active Participation and Ownership, that are interrelated and integrated with the decision making process. When employees are required to abide by set guidelines and procedures, Directed Participation is appropriate. This has been observed to occur with little or no input from employees, whilst the application of legislation requires the process of involvement where critical decisions are made outside the domain of the employee. The pro-active participation process entails the sharing, consulting and making of joint decisions, which is most suitable in the Safety Health and Environmental committees, ensuring the process of Ownership empowers employees to champion the OHS activities. In OHS management there are instances when numerous participative approaches are utilised simultaneously to make decisions. All employees, both blue collar workers and management have a positive influence in creating a safe workplace, with the likelihood of older and experienced employees participating more than their younger counterparts in the decision making processes within the various OHS forums. Also, the more employees assume full responsibility for their health and safety, the greater is their influence to find solutions to the safety challenges. Additionally, making joint decisions to create a safe workplace will, in turn, encourage employees to participate more. The use of the participative approaches results in an improvement in the iii decision making processes within S.H.E. committees and OHS management processes, thereby making a positive contribution. More research is recommended to explore the relationships between employee participation in decision making and the compliance to OHS legislation, employee training, the safety culture and the influence of trade unions. / Business Management / DBL

Background: Agriculture plays a vital role in the economy of any industrially developing country, including South Africa. In the Eastern Cape of South Africa citrus farming is a significant contributor to the local economy (Johnson et al., 2005). The harvesting phase of citrus farming is performed manually and exposes workers to physical risks, which can lead to the development of musculoskeletal disorders. In particular, the standard harvesting bag comprises of a single shoulder strap and promotes asymmetrical load carriage which results in shoulder and lower back pain complaints. The current study compared the physiological (EMG), perceptual (RPE), usability (PUEU) and productivity effects of two new harvesting bag designs (a hip belt and a backpack bag design) to the standard harvesting bag design. This was performed in a laboratory as well as a field setting. Methods (Laboratory phase): 36 participants (12 males and 24 females) were assigned to one worker group. The “tall ladder worker” group was comprised of only males and the “step ladder worker” and “ground worker” group of females. Each participant was required to simulate a citrus harvesting task while utilizing each of the bag designs on different days. On each day/test session, participants performed three harvesting cycles. Muscle activity was measured throughout the entire testing session and RPE were recorded at the end of each cycle. Results (Laboratory phase): The EMG and RPE results indicate that the backpack design was the most ideal design to reduce asymmetry, while the standard harvesting bag design was the worst. Although not significant, there was greater muscle asymmetry (p=0.109) and a significantly higher perceived exertion when using the standard bag (p=0.0004), in comparison to using the backpack. Methods (Field phase): 17 Xhosa-speaking citrus harvesters (6 females and 11 males) participated in this study. Each harvester worked with one of the three bag designs on a different day. Productivity of each worker was assessed every hour by recording the number of bags filled with fruit and at the end of the shift. A Perceived Usefulness & Ease of Use questionnaire was presented to each participant to obtain feedback on worker acceptance to the new bag designs. Results (Field phase): A general trend in support of the hip belt bag design over the other two bag designs were found, even within the different worker demographic groups (age, sex and worker experience). The workers perceived less exertion (7.98 ± 1.86) and were more productive (9.90 ± 2.11 bags/hour) when using the hip belt design; they also found this bag the most useful (1.02 ± 0.09) and easy to use (1.07 ± 0.25). In contrast, the backpack bag design had significantly poorer responses when compared to the other two bag designs and this was evident in all the dependent variables assessed (RPE, productivity and PUEU). Conclusion: The results from the laboratory phase supported the expectation that the backpack bag design reduces asymmetry and hence, is more suitable than the standard harvesting bag. However, results from the field show that the hip belt bag design was the most preferred and the backpack was the least preferred. Bao & Shahnavaz (1989) highlight the need for ergonomics researcher to convey laboratory findings into the field context. However, as shown by the current study, there are numerous challenges associated with field work, making it difficult for laboratory findings to be successfully conveyed to the field. Limitations and Recommendations: For the laboratory phase of the project, no biomechanical and cardiovascular responses were assessed. However, for a holistic approach, these variables should be considered in future studies. Due to high variability from one harvesting cycle to another, more than three harvesting cycles should also be performed to accurately replicate the harvesting process as done in the field over extended durations of time. For the field phase, data should be collected from more than one citrus farm and thus a larger sample size could be obtained. This would improve the validity of the study. In addition to this, data should be collected for a full working day, especially if environmental conditions are not a hindrance, as well as for a whole season, since workloads vary, depending on the time of the harvesting season. / Name on Graduation Programme: Bassey-Duke, Elizabeth Missan