If an organization wants to ensure the demand for services is accommodated, and builds in the ability to provision or de-provision resources as needed to support those services, it has employed the concept of:

scalability

Explanation:

According to my research on different business strategies, I can say that based on the information provided within the question this company has employed the concept of scalability. Like mentioned in the question Scalability is the ability to handle a growing amount of work by adding resources to the process or system.

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