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Technology Stocks : Discuss Year 2000 Issues
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To: B.K.Myers who wrote (5142)3/30/1999 5:41:00 AM
From: Ken  Read Replies (2) of 9818
 
Embedded chips/systems:A List of What Can Go Wrong
Link:
iee.org.uk
Comment:
This list appears on the y2k site of the British Institution of Electrical Engineers.

* * * * * * * * * * *

Failures may result from failures in planning or carrying out the Year2000 programme, for example

(a) failure to find an embedded system

(b) failure to recognise the criticality of a particular system

(c) failure to identify connections between a simple system and a complex one (i.e. failure to recognise that a particular item is not stand-alone, but forms a component of a larger, more complex and date-sensitive system)

Failure modes include:

Direct failure

Indirect failure

Latent failure

Compounding failure (combination of two failures)

Cascading failure

An embedded system may fail in a number of different ways, each of which should be considered:

(a) loss of manual control: i.e. operators cannot alter the current state of the system

this may occur in combination with any of the following

(b) open / running

(c) shut / inactive

(d) position or operation level or mode current at the time of failure

Failures may occur

(a) at an unanticipated date

(b) in an untested mode

(c) in a mode which was intended should never exist

Any such failure may result in an "emergency"


Link:
iee.org.uk

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