urn a steering wheel to the right or will maximally swerve to the left if we turn it to the left. Instead of smooth and accurate trimming to follow the designate course of movement the car will be harshly rushing about from right to left and other way round. The goal will not be achieved and the car will be destroyed. Basically the composite Systemic Functional Unit could have delivered graded result of action since it has several SFU which it could actuate in a variable sequence. But such system cannot do so because it "does not see" the result of action and cannot compare it with what should be done/what it should be.
Quantity of the result of action. To achieve the preset goal the designation of the quality of the result of action only is not sufficient. The goal sets not only "what action the object should deliver "(quality of the result of action), but also "How much of this action" the given object should deliver (quantity of the result of action). And the system should seek to perform exactly as much of specific action as it is necessary, neither more nor less than that. The quality of action is determined by SFU type. The quantity is determined by the quantity of SFU. There are three quantitative characteristics of the result of action: maximum, minimum and optimum quantity of action. In the real world gradation of the results of action is required from the real systems. Therefore, the system performance should deliver neither maximum nor minimum, but optimum result. Optimum means performance based on the principle "it is necessary and sufficient ". It is necessary that the result of action should be such-and-such, but not another in terms of quality and adequate in terms of quantity, neither more nor less. Hence, the SFU cannot be the full-fledged systems. The systems are needed in which controllable/adjustable grading of the result of action would be possible. For example, it is required that the pressure of 100 mm Hg is maintained in the tissue capillaries. This phrase encompasses presetting of everything what is included in the concept "necessary and sufficient "at once. It is necessary ... pressure, and it is enough ... 10 mm Hg. It is possible to collate the SFU providing pressure, but not of 10 mm Hg, but, for instance, 100 mm Hg. It is too much. It is probably possible to collate the SFU which can provide pressure of 10 mm Hg and at the moment it might be sufficient. But if the situation has suddenly changed and the requirement is now 100 mm Hg rather than 10 mm Hg, what should be done then? Should one run about and search for SFU which may provide the 100 mm Hg? And what if it's impossible to make such system which would be able to provide any pressure in a range, for example, from 0 to 100 mm Hg, depending on a situation? In order to provide the quantity of the result of action which is necessary at the moment, the grading of the results of action of systems is required. It could have been...
