My customer would like to use Pega's NBA (Next Best Action) and they have the historic data in another system. Which least Pega's package will help them? From PDN materials, I understood that Pega CRM suite is must. Please confirm.
Can you perhaps clarify your question a bit more? Commercially to use NBA you need to be licensed for Customer Decision Hub, or applications that include it such as Pega Marketing. Fetching the data from various sources that would go into those decisions does not require CRM, functionalities like Data Sets, Data Flows, Connectors etc will suffice.