Definition
Japanese "where the real happens": the site of value creation (workshop, accounts payable, call centre, etc.) also includes real things and true facts and data.
In detail
Gemba refers to the actual place where value is created, such as a workshop, office, or call center, and also includes real items, facts, and data. It emphasizes that managers must go to the site, observe the actual process, to understand problems and make correct decisions. In the lean system, gemba is the starting point of lean leadership, closely tied to the concept of genchi genbutsu (go and see for yourself). Compared to conference room analysis, Gemba provides first-hand information and avoids subjective assumptions. Its output is typically improvement opportunities and decision-making bases based on on-site observation.
Example in practice
A quality manager noticed an increase in the defect rate of a product. Instead of just looking at reports, he went to the production line to observe operations. He found that workers were missing parts during assembly due to poor part placement, so he adjusted the workstation layout and added poka-yoke devices. The problem was resolved, and the manager understood the importance of the gemba.