Consider the following bill of material. Forty units of Product A are needed. Assuming no on-hand inventory, and no scheduled receipts, explode the bill of material. 
Definitions:
Written Referral
A Written Referral is a document provided by a professional recommending a patient or client to another specialist or service for further treatment or assessment.
Comprehensive Services
A wide-ranging set of programs or interventions designed to address multiple aspects or dimensions of a problem, issue, or need.
Duplication
The act or process of making an exact copy of something, or repetition of an effort, which can lead to inefficiency or waste in some contexts.
Observable
Something that can be seen, noticed, or measured directly.
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