Gemba
Where all the activity is. 5 Rules to follow-1. Go to the gemba first; 2. Check with gembutsu; 3. Take countermeasures; 4. Find root cause; 5. Standardize to prevent recurrence

Genchi Genbutsu
Go see the problem. This is the belief that practical experience is valued over theoretical knowledge. You must see the problem to know the problem.

Grade
An indicator of category or rank related to features or characteristics that cover different sets of needs for products or services intended for the same functional use.