上游充互大粤 SHANGHAI JIAO TONG UNIVERSITY Step 1:Clarify the Problem Understanding the problem Who is the customer? >What are the customer needs? ·Customer needs Preliminary product specification What are critical"sub-problems"? Problem decomposition Breaking the problem down into simpler subproblems Focusing on critical subproblemsStep 1: Clarify the Problem Understanding the problem  Who is the customer?  What are the customer needs? • Customer needs • Preliminary product specification What are critical “sub-problems”?  Problem decomposition • Breaking the problem down into simpler subproblems  Focusing on critical subproblems