Gregg Ellerbe Somers, Colton Jonathan, Matin Md Abdul, Krupnik Timothy J
Georgia Institute of Technology, Schools of Mechanical Engineering, Industrial Design, International Affairs, Atlanta, GA, 30332-0405, USA.
International Maize and Wheat Improvement Center, Sustainable Intensification Program, H 10/B, R53. Gulshan 2, Dhaka, 1212, Bangladesh.
Dev Eng. 2020;5:100046. doi: 10.1016/j.deveng.2019.100046.
Smallholder farmers provide the foundation for food security in South Asia. However, increasing seasonal labor scarcity caused by rural out-migration has resulted in growing agricultural labor costs, presenting challenges to cash-constrained smallholder farmers that hire manual labor for land preparation, sowing, harvest and post-harvest operations. Technological innovations in small-scale agricultural machinery appropriate for the small field sizes and limited resource endowments of South Asia's farmers have been proposed as a potential solution to this problem. An increasing number of development initiatives also promote rural entrepreneurial approaches to mechanization, whereby smallholder farmers can access and use machinery in their own fields on an affordable fee-for-service basis offered by machinery owners. This approach reduces capital constraints for smallholder farmers while enabling entrepreneurs who can afford equipment to enter into business serving stallholder farmers as clients. This approach is now widely practiced in Bangladesh, where machinery entrepreneurs play a crucial role in providing access to productive technologies for smallholder farmers who could not otherwise afford direct purchase of labor- and cost-saving machinery. In order to maintain low machinery purchase costs for emerging yet capital constrained rural entrepreneurs, while also assuring high quality standards, cost-effective domestic production of agricultural machinery is increasingly championed as an important long-term national development objective. With no safety standards or guidelines for best production practices, the few manufacturing workshops that exist within Bangladesh operate inefficiently and without clear rationalization of manufacturing processes. Haphazard copying of prototypes or imported available machinery is common. This leads to inefficient production and poor product quality in an emerging but potentially highly beneficial industry. This paper addresses these problems and presents a case study to increase machinery manufacturers' capacity while improving manufacturing operations and workplace safety through equipment selection, workshop layout, and usability. Janata Engineering (JE) is a small-scale machinery manufacturing enterprise in Bangladesh, specializing in two-wheel tractor attachments such as bed planters, local derivations of power-tiller operated seeders, and other equipment for planting, irrigating, and processing crops. JE was expanding and setting up a second factory for which the authors provided assistance on its design. Our research question was whether participatory action research (PAR) supported by empirical data could provide improved factory design in terms of functionality, safety and human interactions, when compared with conventional approaches driven by technical efficiency concerns alone. Using PAR, we developed a number of alternative process and layout recommendations for JE to increase the efficiency of labor and machinery through improved workflow, throughput, and output. While immediately useful for JE, the process and protocols proposed in this paper are relevant for emerging agricultural machinery manufacturers in Bangladesh and more widely in South Asia.
小农为南亚的粮食安全奠定了基础。然而,农村人口外流导致季节性劳动力日益短缺,使得农业劳动力成本不断上升,这给资金紧张的小农带来了挑战,他们在土地准备、播种、收获及收获后作业中需要雇佣体力劳动者。针对南亚农民耕地面积小、资源禀赋有限的情况,有人提出发展适合小规模农业的机械创新技术,作为解决这一问题的潜在方案。越来越多的发展倡议也在推广农村机械化创业模式,即小农可以通过机械所有者提供的价格合理的服务收费模式,在自己的田地里使用机械。这种模式减少了小农的资金限制,同时使有能力购买设备的创业者能够进入市场,为小农提供服务。这种模式目前在孟加拉国广泛应用,在那里,机械创业者对于那些无力直接购买节省劳动力和成本的机械的小农来说,在提供获取生产技术的途径方面发挥着关键作用。为了让新兴的、资金紧张的农村创业者能够维持较低的机械购置成本,同时确保高质量标准,农业机械的经济高效的国产化生产日益被视为一项重要的长期国家发展目标。由于缺乏安全标准或最佳生产规范指南,孟加拉国现有的少数制造车间运营效率低下,生产流程也没有经过合理规划。随意复制原型或进口现有机械的情况很常见。这导致了这个新兴但可能极具效益的行业生产效率低下、产品质量不佳。本文探讨了这些问题,并通过一个案例研究,介绍如何通过设备选型、车间布局和可用性设计,提高机械制造商的生产能力,同时改善制造流程和工作场所安全。贾纳塔工程公司(JE)是孟加拉国一家小型机械制造企业,专门生产两轮拖拉机附件,如苗床播种机、动力耕耘机改装的播种机以及其他用于作物种植、灌溉和加工的设备。JE正在扩大规模并筹建第二家工厂,作者为其设计提供了协助。我们的研究问题是,与仅出于技术效率考虑的传统方法相比,基于实证数据的参与式行动研究(PAR)能否在功能、安全和人际互动方面提供更好的工厂设计。通过PAR,我们为JE制定了一些替代工艺和布局建议,以通过改进工作流程、产量和产出,提高劳动力和机械的效率。本文提出的流程和方案不仅对JE立竿见影,对于孟加拉国乃至更广泛的南亚地区新兴的农业机械制造商也具有借鉴意义。