ANSS - Advanced National Seismic System

TIC Working Group on Evolutionary System Architecture (E)

TIC Group E Website

Duration: Long-term
Associated TIC Tasks: 1 and 2
Timetable: Follows results of working groups A, B, and I, July, 2004-July, 2005

Members of ANSS TIC Group E


"A system is a set of interrelated components which interact with one another in an organized fashion toward a common purpose. The components of a system may be quite diverse consisting of persons, organizations, procedures, software, equipment, and/or facilities. . . . Systems engineering is a robust approach to the design, creation, and operation of a system." (NASA Systems Engineering Handbook, 1995).


This working group is responsible for defining an evolutionary path for transforming existing elements of ANSS into a functional nationwide system—with emphasis on steps that can be taken in the near term (1–3 years), based on realistic ANSS funding projections. The approach should include clarifying key system performance goals, characterizing “where we are now”—both region by region and as a whole—in terms of being able to meet those performance goals , and accounting for geopolitical realities as well as abstract ideals in designing an ANSS system architecture.


  1. As a starting point for deliberations, read and become familiar with the concepts and recommendations made in Chapter 2 and Appendix D of the TIC Plan (OFR 02-92) for ANSS architecture and interconnection.
  2. Review available ANSS documents (e.g., Circular 1188; OFR 02-92; USGS Program Announcement 04HQPA0002, June 2003, Attachment A; 2002 white paper by A. Lerner-Lam on performance-based assessment). Review the results of Working Groups A, B and I and other information pertaining to the seismic network review.
  3. Based on the region-by-region review, and considering how the California Integrated Seismic Network (CISN) has evolved in California subsequent to the writing of OFR 02-92, make specific written recommendations for either adopting or modifying what was proposed in OFR 02-92 for ANSS architecture and interconnection.
  4. Combining the outcomes of tasks 1–3, define an evolutionary path for transforming existing elements of ANSS into a functional nationwide system, including prioritized steps that can be taken in the near term (1–3 years) to maximize system performance under realistic ANSS funding projections.
  5. In particular, this working group should propose specific technical recommendations on “how to get there from here”. What steps or actions taken by the ANSS can improve system performance in the short-term?