Jidoka means autonomation with a human touch.” The term is often used in association with a quality control process of the Toyota production system (TPS), or lean manufacturing. Jidoka is one of the basic concepts of the TPS and its main goal is to eliminate waste in the production process and streamline operations. The concept of jidoka proposes the importance of human elements and labor incentives for workers. Therefore, jidoka is not merely about automation or mechanization, but autonomation, with recognition of human elements. For example, mechanical operations are subject to mistakes due to defects in machines, which lack the intelligence to detect and avoid mistakes. However, a machine is on jidoka if it is equipped with abilities and functions to detect and avoid such mechanical dysfunctions by itself. Hence, jidoka involves the automatic detection of errors or defects in the process of production.
See also: Just-in-time; Toyota production system
Just in time (JIT) is one of important components of the Toyota production system. JIT is a production technology system that promotes economic efficiency, with the central principle of produce appropriately what is necessary, just as much as needed, when needed. The main goal of JIT is to keep the stock at the necessary minimum during the production process for a complete balance between orders and production. Generally, there are various processes between receiving orders and shipment of products, resulting in prolonged lead time and opportunity loss for general mass-produced items. JIT can be also understood as an inventory strategy for improving the return on investment of a business by reducing in-process inventory and its associated costs.
See also: Toyota production system