Forum Questions and Answers
Topic: PRISM Questions and Answers
Topic Posted by: SRC
Date Posted: Wed Jan 12 8:33:33 US/Eastern 2000
Topic Description: Welcome to the PRISM forum! Please feel free to post your questions and comments about the PRISM assessment software here.
Posted by:Thomas Urbanczyk
(thomas.urbanczyk "at" systema-gmbh.de
Date posted: Fri Jan 20 5:14:35 US/Eastern 2006
Subject: IC,Memory/Microprocessor Model
By performing a MTBF FaultTree breakdown (PRISM was used for MTBF data input), I noticed the following issue regarding the IC,Memory/Microprocessor Model as utilized for main processors:
How is it possible, that the PRISM model of a highly complex microprocessor (e.g. Freescale PowerPC) will deliver a lower (baseline) item failure rate as the PRISM model of a lowcost And-Gate?
Both components has been modelled with the same parameters. I would expect the defect rate of the microprocessor significant higher.
Could you please explain this circumstance?
Could you furthermore make a proposal, how to represent the complexity of such highly complex ICs versus simple AND-Gate ICs with the given options in PRISM?