when a relationship has developed is to calculate how many times a given consumer has made buys from the same company.If there have been a number of regular buys,or agreement has been effective for a certain extent of time, one might say that a relationship with this consumer can be a sign of the evolution of a relationship between company and this consumer.
If there have been a number of continuous buys, or contract has been effective for a certain period of time, one might say that a relationship with this customer can be a sign of the development of a relationship between firm and this customer.