This paper presents a new agent based model for unifying organizational deviation and Kaizen activities. Deviation and Kaizen are both activities in business firms to break standards in operations. However, it is assumed that the former and the latter are different in terms of external utilities. Under the assumptions, we have developed a unified model and conducted simulations. The results show deviation, Kaizen, and stagnation phenomenon that are caused by the change of utility landscapes, diversity of agents, and reward distribution system. We have suggested the harnessing mechanism of deviation and Kaizen based on the experiment results.