FEAT, the Failure Environment Analysis Tool, was written for NASA Johnson
Space Center to enable people to see and better understand the effects of
failures in a system. Failures can be user-selected from either
engineering schematic or digraph model graphics, and the effects or
potential causes of the failures will be color highlighted on the same
schematic or model graphic. FEAT uses digraph models to answer two
questions: 1) What will happen to a system if a set of failure events
occurs, and 2) What are the possible causes of a set of selected
failures?

In FEAT 3.3e, inventory number MSC-21873, creation of digraphs is
facilitated by the Digraph Editor. For very large integrated systems, FEAT
3.3e can be a real cost saver in terms of design evaluation, training, and
knowledge capture. New features allow multiple digraphs and schematics to
be loaded into FEAT 3.3e. These enhancements make it easier to identify
single and double point failures that may have to cross several system
boundaries and multiple engineering disciplines before creating a
hazardous condition. Even people who are unfamiliar with digraphs can use
FEAT to better understand failures of a modeled system. Schematics may be
produced using MacDraw II version 1.1 or MacDraw Pro.

The Failure Environment Analysis Tool is written using Macintosh
Programmers Workshop C v3.2. The program requires 32 Bit QuickDraw, and at
least a Macintosh II series computer running 6.0.6 or later. Under System
7, 32 Bit QuickDraw is not required. A minimum of 3-5Mb of memory is
highly recommended.

A color monitor is necessary (or 256 gray scales). If a math coprocessor is
not present, a coprocessor emulator will be necessary. The standard
distribution medium for FEAT is a set of four 3.5 inch Macintosh format
diskettes. An electronic copy of the documentation is included on the
program media along with example digraph files. Program $700;
documentation $33.

COSMIC, The University of Georgia
382 East Broad St, Athens, GA 30602-4272
706-542-3265

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