Criteria are primarily economic.
Periodic EOLS review is necessary because it is often otherwise difficult to withdraw support allocated to old systems and reassign this support to future endeavors. It can therefore be difficult to find resources to support future systems. EOLS review helps to break such a deadlock, and facilitates movement toward the future. As part of an ongoing effort to improve SCD productivity and efficiency and to focus the resources of the division on those activities that deliver the most useful products and services to the UCAR community, SCD continuously evaluates the utility and viability of the hardware and software systems it maintains and the services it renders. As new technologies emerge, they often supercede previous ones adopted for use in the NCAR computational, storage, and communications environments.