上游充通大粤 SHANGHAI JIAO TONG UNIVERSITY Responsibility Matrix The responsibility matrix shows which individual is responsible for accomplishing each work item in the WBS in a tabular format. Conventions: P:Primary responsibility S:Support responsibilityResponsibility Matrix The responsibility matrix shows which individual is responsible for accomplishing each work item in the WBS in a tabular format. Conventions: • P: Primary responsibility • S: Support responsibility