## A Methodology for Systems Engineering, Volume 24 |

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Page 70

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**variables**if these**variables**tend to remain within defined limits . The man - made thermostat is an example of a device to ensure stability in the tempera- ture of a heating system ; the notion of stability is familiar also in me ...Page 132

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**variables**to be measured The range and number of values each**variable**can assume • A list of known and suspected interactions among the**variables**○ An operational procedure for making each observation resulting from the above three • A ...Page 195

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**Variables**We have noted that many market**variables**are distributed over some range . In these cases the possible demands will be distributed too , and the values of the distribution parameters are found by the usual methods of ...### Contents

SOME FUNDAMENTAL CONCEPTS OF SYSTEMS | 3 |

THE TD2 RADIO RELAY SYSTEM | 22 |

3 | 61 |

Copyright | |

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alternative amplitude analog computer analysis basic Bell Telephone Laboratories block diagram called channel Chapter choose circuit complete components cost creative creative technology criterion curve decision defined demand functions discussed economic encoding entropy environment equation evaluation example existing factors feedback frequency given important income individual information theory inputs and outputs interval scale kinds level of measurement logical Mason's rule matrix maximum means measure ment methods minimax mixed strategy noise objectives operations research optimal organization payoff payoff matrix phase physical planning possible preference probability problem profit projects properties radio ratio ratio scale requirements scale signal signal-flow graph solving specific statistical strategy studies subsystems systems engineering systems engineering process systems synthesis technical techniques telephone television theory tion transfer function transmission transmittance utility variables