a method and system is provided for managing a sales quota for the sale of one or more services or products , by an agent for a supplier , to ensure the agent does not surpass a first predetermined limit based on a criterion associated with the sales . the method includes measuring the sales of the service or product by the agent during a first predetermined time period , computing associated statistical indicators from the sales measures , and determining a sales quota for the agent to apply during a second predetermined time period . the sales quota is based on the statistical indicators and one or more airline business rules , to enable management of the sales of the agent without the sales surpassing the first predetermined limit .