the committee's recommended research portfolio to assess the extent to which research is addressing the major issues that decisionmakers need to consider as they review the scientific evidence relevant to the PM NAAQS. It then evaluated current and planned research activities with six criteria, which are described below. The first three—scientific value, decisionmaking value, and timing and feasibility 1 —are research-outcome criteria, and they were applied to research in each of the committee's 10 topics (see Chapter 3). The last three—multidisciplinary interaction, integration and planning, and accessibility of information—are research-planning criteria, and they were applied more generally than the other three (see Chapter 4).

Where possible and appropriate, the committee applied quantitative indicators to evaluate progress in implementing PM research, but most of the indicators were qualitative and were based on professional judgment.

Research-Outcome Criteria

The first three evaluation criteria guided the development of the committee's research portfolio, including recommended research topics, estimated budgets, and approximate periods for conducting research (see Table 1.3). The committee concluded that these criteria serve equally well as outcome measures for evaluating progress in obtaining research results that decisionmakers will use in determining whether to revise the PM NAAQS in 2002.

Scientific Value

How well does the research build on previous scientific findings to address key scientific uncertainties in a source-to-effect framework (see Figure 1.1)? The research should contribute to the development


“Timing and feasibility” are treated as one criterion.

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