Customer
In sales, commerce and economics, a customer (sometimes known as a client, buyer, or purchaser) is the recipient of a good, service, product or an idea - obtained from a seller, vendor, or supplier via a financial transaction or exchange for money or some other valuable consideration.
Management
Management (or managing) is the administration of an organization, whether it is a business, a not-for-profit organization, or government body. Management includes the activities of setting the strategy of an organization and coordinating the efforts of its employees (or of volunteers) to accomplish its objectives through the application of available resources, such as financial, natural, technological, and human resources. The term "management" may also refer to those people who manage an organization.
Relationship
Relationship most often refers to:
Theory
A theory is a contemplative and rational type of abstract or generalizing thinking, or the results of such thinking. Depending on the context, the results might, for example, include generalized explanations of how nature works. The word has its roots in ancient Greek, but in modern use it has taken on several related meanings.
Management
It is better to first get the right people on the bus, the wrong people off the bus, and the right people in the right seats, and then figure out where to drive.
Jim C. Collins (2001). Good to Great: Why Some Companies Make the Leap...and Others Don't p. 41.
Management
The brutality of a man purely motivated by monetary considerations … often does not appear to him at all as a moral delinquency, since he is aware only of a rigorously logical behavior, which draws the objective consequences of the situation.
Georg Simmel, “Domination,” On Individuality and Social Forms (1971), p. 110
Theory
The final test of a theory is its capacity to solve the problems which originated it.
George Dantzig (1963) Linear Programming and Extensions, Princeton University Press, p. vii.
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