Appreciation to others plays important role in business. In organization, if we do not appreciate those who have performed good service or disrespected them, others will start not to believe in you. It can harm trust of your employees.
Appreciation is also a kind of motivation. To include appreciation in your policy is to make your policy become motivator to enhance your employees' performance.
Read A Short Fable Story about Disrespect to Those Who Have Performed Service.