1. Sun Zelong 15/11/2011

2. Background Motivation Methodology

3. IC Fabrication Testing Shipping Test Escape Fail in system- level functional test Fail at customer side

4. Diagnosis Test Engineer Diagnosis Tests Debug Engineer Diagnosis work Feedback Test Behaviors Gap First time diagnosis accuracy is less than 60% for complex boards

5. Diagnosis Experts Test behavior and purpose Report: Test Quality Assessment Analytical Engine Debug Engineers Feedback for tests Report: Diagnosis suggestions LDDL

6.  Let the people contribute the knowledge they know best. ◦ Designers ->Spec. ◦ Diagnosis experts->Test description. ◦ Debug engineers->Feedback of tests.  LDDL ◦ Easy to express the knowledge. ◦ Global knowledge collection. ◦ Automatically provide more valuable feedback to every stakeholder.

7. Designer Debug Engineers Diagnosis Engineers LDDL Analytical Engine LDDL Analytical Engine test t1 { flow: A>B>C; B::a>B::b; B>D>C; call: A{ta1,ta2,ta3}; B::a{tba1,tba5}; B::b{tbb2,tbb4}; C{tc3}; D{td1}; } test t2 ….. asic B { a>b>c>d>a; b>d; c>a; } block B::a { tests: ta1=50%; ta2=20%; ta3=10%; relations: ta1^ta2=0.5; ta2^ta3=0.2; ta1^ta2^ta3=0.05; }