The present paper is concerned with a review of the recent trends of human factors evaluation in system design from view point of man-machine system.
Human factors evaluations range all the phase of system development; that is from functional analysis, equipment drawings, to fields tests.

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The primary objective of this report is to provide tools and techniques necessary for determining the role of man and the allocation of functions to man and machine. The following four areas are identified, and representative studies in each, along with their implications, are discussed;
1) man-machine comparison
2) current application of total effectiveness concepts
3) man-machine system analysis and evaluation techniques
4) data store for derivation of man-machine function allocation formulae

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The automated instruction as developing CAI are reviewed from such a standpoints as man-machine interface and the direction of CAI research and development are suggested conceptually. Man-machine ineterface are divided into four main problems, namely, interface logic, interface language, interface device and interface space design. In the former two problems known as software are most important in the design of adaptive, optimal and intelligent CAI system. The author suggested that the logic itself must become the artificial intelligence teacher in near future. The later two problems mean the hardware including machine and structure of architechure to set up CAI system. which should be considered human factors.

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This paper deals with the characteristics of the reaction lag time of human operator in man-machine systems. The human operator acts as a servo element in air-craft, in submarine and automobile.
For these systems the fundamental analysis of the characteristics of human dynamics is essential for the system design. In this report, we discuss the reaction lag time of the human operator which is one of the most fundamental characteristics of human dynamics.
Some nonlinearity of reaction lag time obtained by the experimental results.

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There is considerable literature on the response characteristics of manual tracking systems, but little work has been done on the study of changes in response characteristics with the lapse of time. The purpose of this research is to establish a real-time display system of the response characteristics of manual tracking systems making use of an on-line digital computer.
The present article is composed of four parts. First, a new method is proposed which can identify a linear system with a random input signal in a short time, for application to the identification of manual tracking systems whose response characteristics vary slowly with time. Secondly, making use of this method of identification, a display system including on-line computer LINC-8 is constructed, which displays the slowly-varying response characteristics of manual tracking systems, moment by moment, on a CRT screen. Thirdly, a software system which facilitates performance of various kinds of tracking experiments is developed. Lastly, some results of simple pursuit tracking experiments are described and the mode of the tracking operation is discussed.

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This paper deals with a new method of design of a man-machine system by using the sensitivity analysis.
First, a new idea proposed by the authors is presented, which means that an operator can control a machine with little effort if the relation between the sensitivity of the state variation caused by a disturbance and the sensitivity of the state variation varied by the operator is linearly dependent at the man-machine system in which the state variation of the machine caused by the disturbance is continuously compensated to keep the best condition of the machine by the operator.
Next, the new method of system design based on this idea is shown on an example of the manual operating optimal control system, and the simulation studies are carried out on the system designed by the above method.
Simulation results are included to demonstrate the possibility of the proposed method.

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