scholarly journals Development of a Lot-Sizing Model to Prevent Heat Stress and Work-Related Musculoskeletal Disorders

2021 ◽  
Vol 33 (6) ◽  
pp. 871-882
Author(s):  
Sezen Korkulu ◽  
Krisztián Bóna
Keyword(s):  
Heat Stress ◽  
Production Line ◽  
Material Handling ◽  
Lot Sizing ◽  
Metabolic Cost ◽  
Heat Strain ◽  
Total Cost ◽  
Work Related ◽  
Work Related Musculoskeletal Disorders ◽  
Rest Time

Management of heat stress and metabolic cost is vital for preventing any work-related disorders. In this paper, we integrated rest time formulations for heat strain and metabolic cost to develop a new lot sizing model for preventing heat exposure and work-related musculoskeletal disorders. The effects of heat strain and rest allowance on the total cost of the production supply process were investigated. The problem studied in this paper was the handling of the raw materials placed in boxes by manual material handling in order to supply the material requirement of a production line placed in a production area. For the realisation of the material handling transactions between the raw material warehouse and the production line, Electric Pallet Jack (EPJ) was used. The study covers the investigation of picking, storing, and carrying motions for the manual handling of these materials. The result of the analysis has shown that 8.5% savings were achieved by using the heat strain and rest time in comparison to the total cost of this part of the production line supply process with the ISO 7243 maximum metabolic work limit. Consequentially, the analysis results showed that the developed method demonstrated the viability of lot sizing model optimisation with multiple objectives and complex constraints with regards to the metabolic cost and heat strain.

scholarly journals Ergonomics as a Social Component of Sustainable Lot-sizing: A Review

2019 ◽  
Vol 27 (1) ◽  
pp. 1-8
Author(s):  
Sezen Korkulu ◽  
Krisztián Bóna
Keyword(s):  
Lot Sizing ◽  
Social Sustainability ◽  
Three Dimensions ◽  
Work Related ◽  
Planning And Control ◽  
Social Component ◽  
The Social ◽  
Work Related Musculoskeletal Disorders ◽  
Definition Of ◽  
And Control

Lot-sizing has an increased attention in recent years. In the area of production planning and control, this trend has given rise to the development of lot-sizing models that considers sustainability issues besides the optimization of total operational cost. The study is based on tertiary study that is ensured to analyze the total work have been published. The research was conducted by the definition of appropriate keywords for understanding sustainability issues and ergonomics as a social component in lot-sizing. The paper at hand attempts to understand the development of sustainability issues in lot-sizing and ergonomics as a social component in lot-sizing. We observe that studies focusing on all three dimensions of sustainability are comparatively scarce. However, only a few of the studies have been covered the social sustainability aspect. It is observed that studies addressing ergonomics issues are scarce, and more focus is required on the social sustainability impacts along the supply chain and lot-sizing. Most of ergonomic assessment covered relaxation allowance and energy expenditure rate, OWAS, NIOSH and another consideration about ergonomic lot-sizing is the motion types investigated by authors which were picking, storing as a lifting and carrying motions and did not covered pushing, pulling, bending and other hand motions which have positive relationship with work related musculoskeletal disorders. Finally, we propose future directions to extend research on the ergonomics in lot-sizing.

scholarly journals Causal Relationship Between the Risk Factors and Work-Related Musculoskeletal Disorders Among Professional Drivers: A Systematic Review

2021 ◽  
pp. 001872082110065
Author(s):  
Leonard Joseph ◽  
Lenny Vasanthan ◽  
Miles Standen ◽  
Raija Kuisma ◽  
Aatit Paungmali ◽  
...  
Keyword(s):  
Risk Factors ◽  
Causal Relationship ◽  
Musculoskeletal Disorders ◽  
Material Handling ◽  
Individual Characteristics ◽  
Whole Body ◽  
Professional Drivers ◽  
Moderate Evidence ◽  
Work Related ◽  
Work Related Musculoskeletal Disorders

Objective This review evaluates the evidence on the strength of causal relationship between categories of risk factors (RFs) and work-related musculoskeletal disorders (WRMSDs) among professional drivers. Background A compilation of evidence on the causal relationship between RFs and WRMSDs among professional drivers is lacking. Methods A systematic search of the literature was conducted in major electronic data bases that include Medline (1946 + via OvidSP), Embase (1974 + OvidSP), CINAHL (1982+), AMED, and Web of Science. The methodological quality of the studies was assessed and scored. A descriptive analysis on the categories of RFs associated with WRMSDs was conducted. The Bradford–Hill causation criteria and evidence interpretation tool were used to evaluate the causal relationship between RFs and WRMSDs in professional drivers. Results Among the 54 studies reviewed, a strong evidence suggests a causal relationship between RFs such as whole-body vibration, awkward postures, lifting tasks, manual material handling, job stress, job demand, and previous pain episodes with WRMSDs. Moderate evidence was observed on RFs such as uncomfortable seat and low job satisfaction. The evidence on causal relationship between RFs such as years of professional driving, driving duration, and individual characteristics such as age and body mass index was inconclusive. Conclusion There is strong to moderate evidence on the causal relationship between the physical and psychosocial RFs and WRMSDs among professional drivers. Application Potential application of this review highlights evidence to occupational health practitioners, policy makers, and stakeholders on the strength of causal relationship between RFs and WRMSDs among professional drivers.

scholarly journals THE EFFECT OF LATERAL LIFTING TASKS ON HAND GRIP AND PINCH STRENGTH MEASUREMENTS

2021 ◽  
Vol 22 (2) ◽  
pp. 261-282
Author(s):  
Joe Yee Tan ◽  
Azrul Azwan Bin Abdul Rahman ◽  
Nadiah Binti Ahmad ◽  
Arfauz Bin A.Rahman
Keyword(s):  
Material Handling ◽  
Upper Extremities ◽  
Repeated Measure ◽  
Pinch Strength ◽  
Work Related ◽  
Hand Grip ◽  
Manual Material Handling ◽  
Work Related Musculoskeletal Disorders ◽  
Relationship Of ◽  
The Relationship

In lateral material handling tasks, which is very common in industries, warehouse systems, and other sectors, the workers can lead to work-related musculoskeletal disorders (WMSDs) because of the task and work designs, especially in upper extremities. WMSDs in hand, wrist, and fingers cause workers to have health problems, in pain and uncomfortable, hence decrease their working productivity and efficiency. The workstations distances are one of the factors that might affect workers when they perform manual material handling laterally, which can lead to WMSDs in hands. Hence, there is a need to study the relationship between transfer distances with the hand grip and pinch strengths. An experiment was carried out with 30 male participants to identify the relationship of lateral transfer distances with the hand grip and pinch strengths. The results obtained from the experiment were further investigated and analysed by using repeated measure one-way MANOVA and graphs. The results had proved that in the distances of 1.0 m, 1.25 m and 1.5 m did not affect one’s hand grip and pinch strengths. But, the postures and movements were varied based on distances. ABSTRAK: Pengangkutan barang atau bahan secara lateral amat biasa dalam industri, gudang dan sektor-sektor lain, dan kerja ini akan menyebabkan pekerja menghadapi penyakit gangguan muskuloskeletal berkaitan kerja (WMSDs) terutamanya di bahagian tangan. WMSDs yang melibatkan tangan dan jari menyebabkan pekerja mempunyai masalah kesihatan secara kekal dan mengalami kesakitan serta tidak-keselesaan. Secara tidak langsung, masalah ini telah mengurangkan prestasi mereka ketika bekerja. Syarikat terpaksa memberi bayaran yang tinggi kepada pekerja untuk kos perubatan and mengalami kerugian besar kerana pekerja yang tidak datang bekerja disebabkan penyakit tersebut. Jarak antara dua stesen kerja adalah faktor yang menyebabkan penyakit ini dihadapi oleh pekerja. Oleh itu, kajian diperlukan untuk mengkaji hubungan antara jarak dan kekuatan genggaman tangan serta jari. Satu esperimen yang melibatkan 30 orang lelaki responden telah dijalankan untuk mengenal pasti hubungan antara jarak dan ganggaman tangan serta jari. Hasil daripada esperimen telah dikaji dan dianalisiskan dengan menggunakan MANOVA dan grafs. Hasil kajian telah membuktikan bahawa jarak dalam 1.0m, 1.25m dan 1.5m tidak membawa apa-apa kesan terhadap genggaman tangan dan jari. Cara dan pergerakan responden adalah berbeza dan disebabkan oleh jarak, walaubagaimanapun, cara dan pergerakan responden tidak membawa sebarang kesan terhadap kekuatan genggaman tangan dan jari mereka.

On the use of wearable physiological monitors to assess heat strain during occupational heat stress

2018 ◽  
Vol 43 (9) ◽  
pp. 869-881 ◽  
Author(s):  
Sean R. Notley ◽  
Andreas D. Flouris ◽  
Glen P. Kenny
Keyword(s):  
Heat Stress ◽  
High Heat ◽  
Heat Strain ◽  
Individual Factors ◽  
Physiological Strain ◽  
Heat Injury ◽  
Wet Bulb Globe Temperature ◽  
Work Related ◽  
Physiological Indices ◽  
Globe Temperature

Workers in many industries are required to perform arduous work in high heat-stress conditions, which can lead to rapid increases in body temperature that elevate the risk of heat-related illness and even death. Traditionally, effort to mitigate work-related heat injury has been directed toward the assessment of environmental heat stress (e.g., wet-bulb globe temperature), rather than toward the associated physiological strain responses (e.g., heart rate and skin and core temperatures). However, because a worker’s physiological response to a given heat stress is modified independently by inter-individual factors (e.g., age, sex, chronic disease, others) and intra-individual factors both within (e.g., medication use, fitness, acclimation and hydration state, others) and beyond (e.g., shift duration, illness, others) the worker’s control, it becomes challenging to protect workers on an individual basis from heat-related injury without assessing those physiological responses. Recent advancements in wearable technology have made it possible to monitor one or more physiological indices of heat strain. Nonetheless, information on the utility of the wearable systems available for assessing occupational heat strain is unavailable. This communication is therefore directed toward identifying the physiological indices of heat strain that may be quantified in the workplace and evaluating the wearable monitoring systems available for assessing those responses. Finally, emphasis is placed on the barriers associated with implementing these devices to assist in mitigating work-related heat injury. This information is fundamental for protecting worker health and could also be utilized to prevent heat illnesses in vulnerable people during leisure or athletic activities.

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