What made you want to look up negative valence? Please tell us where you read or heard it (including the quote, if possible).
WBS is nothing but Work Breakdown Structure. It is mainly used in Project System (PS) module. Tcode: CJ20N. For any project defined we must have atleast one WBS. Within this WBS we can have networks. Networks are nothing but the series of activities. Material are used to perform the activities.
The Behavioral Risk Factor Surveillance System (BRFSS) is a state-based telephone survey that includes. information on a number of health outcomes, risk behaviors, use of preventive services, and chronic. conditions for noninstitutionalized adult residents of states and selected US territories. Since 2011, BRFSS has used updated procedures for data collection, structure, and weighting methodology so the.