TY  - JOUR
PY  - 1983//
TI  - Redundancy for on-line computer control systems
JO  - Reliability engineering
A1  - Johnson, E.
SP  - 105
EP  - 125
VL  - 4
IS  - 2
N2  - Having decided to install an on-line computer control system on a chemical plant the following questions usually arise: 'How often will the system fail?'; 'What is to be done when it does fail?'; 'What size of insurance policy, in the form of redundant equipment, should be taken out?'.  In this paper an attempt is made to answer these questions by considering a number of computer systems where redundant equipment is used with the object of improving the overall system reliability. A comparison of the reliability of four different systems is given, together with some of the pitfalls to be avoided when installing a computer, e.g. common mode.<p /> 
LA  - 
SN  - 0143-8174
UR  - http://dx.doi.org/10.1016/0143-8174(83)90003-3
ID  - ref1
ER  -