## A Methodology for Systems Engineering, Volume 24 |

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Page 248

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**ratio**of the standard devi- ation to the mean . The reason is that the location of the mean varies with the zero point , hence the coefficient varies with this point too . 8.4**RATIO**SCALES = A**ratio**scale has all the properties of the ...Page 249

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**ratio**- scale measurements , hence the opera- tions of forming the**ratio**of two powers , taking the logarithm of the**ratio**, and multiplying by ten are all permissible . The resulting scale is not a**ratio**scale , but an interval scale ...Page 270

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**ratio**is due to the inclusion of the constant cost portion of the total cost curve . That is , the**ratio**ay / ( b + my ) is independent of y only when b = 0. At an out- put of 2 , both criteria correctly select the best system . Note ...### Contents

WHAT IS SYSTEMS ENGINEERING? | 3 |

THE TD2 RADIO RELAY SYSTEM | 23 |

3 4 The State of the Environment at the End of | 32 |

Copyright | |

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alternative analog computer analysis basic behavior block diagram called channel Chapter circuit complete components cost creative criterion decision decision theory defined demand functions direct distance dialing discussed economic environment equation equipment evaluation example existing exploratory feedback frequency given important income individual inputs and outputs interval scale kind laboratory level of measurement logical loop manufacture Mason's rule matrix means measure ment methods minimax mixed strategy objectives operations research optimal organization payoff payoff matrix phase physical system possible preference probability problem profit properties prospectus radio ratio ratio scale relation requirements satisfy scale signal signal-flow graph specific standing plans statistical studies subsystems systems engineering systems engineering process systems synthesis TD-2 system technical techniques telephone television theory tion transfer function transmission utility utility function value system variables