Standardization guide for construction and use of MORT-type analytic trees
Since the introduction of MORT (Management Oversight and Risk Tree) technology as a tool for evaluating the success or failure of safety management systems, there has been a proliferation of analytic trees throughout ERDA and its contractor organizations. Standard ''fault tree'' symbols have generally been used in logic diagram or tree construction, but new or revised symbols have also been adopted by various analysts. Additionally, a variety of numbering systems have been used for event identification. The consequent lack of standardization has caused some difficulties in interpreting the trees and following their logic. This guide seeks to correct this problem by providing a standardized system for construction and use of analytic trees. Future publications of the ERDA System Safety Development Center (SSDC) will adhere to this guide. It is recommended that other ERDA organizations and contractors also adopt this system to achieve intra-ERDA uniformity in analytic tree construction. The proposed system is the outgrowth of the SSDC's experience in developing and teaching the use and construction of MORT diagrams and other analytic trees. It is equally applicable to both ''success'' or ''positive'' trees and ''failure'', ''fault'', or ''negative'' trees.
- Research Organization:
- SEE CODE- 9502158 EG and G Idaho, Inc., Idaho Falls (USA). Idaho National Engineering Lab.
- DOE Contract Number:
- EY-76-C-07-1570
- OSTI ID:
- 7324264
- Report Number(s):
- ERDA-77-45/8; TRN: 77-009170
- Country of Publication:
- United States
- Language:
- English
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