The document discusses how to identify a company's core competitive differentiators in order to determine which business functions are common and can potentially be outsourced versus those that are uncommon and help distinguish the company. It provides a checklist for organizations to use which includes gathering customer feedback, identifying internal expertise, evaluating functions on a common-uncommon continuum, developing an optimization plan with a provider, transferring domain knowledge, and establishing metrics to ensure outsourced functions continue to contribute to differentiation. The document argues that outsourcing common functions allows a company to focus on its uncommon strengths while a provider handles traditional tasks.