Perception subsystem

Note that the Evaluation and Decision-Making subsystem controls Input-Processing to some extent in order to find "relevant" data to help solve problems. This can be useful or it can merely reinforce prejudices. Our evaluation of a situation may distort our subsequent perception of it and thus increase our faith in our evaluation, but at the price of distorted perception, in our desire for certainty, we can throw out the reality of the situation. 

With many products and services, design occurs at the subsystem level where many target components and processes interact to create the final solution. Thus, when you re defining performance and perception expectations, you need to agree on which part of the solution—target or final—is the focus. 

Identify all the relevant customer expectations associated with your planned system or subsystem (see Performance and Perception Expectations, Technique 30). In addition, locate any functional requirements that are not specifically addressed by documented performance and perception expectations. 

This is a way of saying that our perceptions are highly selective and filtered, that there is a major subsystem of consciousness, Input-Processing discussed at length later, that filters the outside world for us. If two people have similar filtering systems, as, for... 

We subject this information to Evaluation and Decision-Making and we may act on it, produce some sort of motor output. This Motor Output subsystem produces action in the body that is sensed via Interoception, in a feedback process through the body. The Motor Output also produces effects on the external world that are again sensed by Exteroception, constituting feedback via the external world. Our perception and decision-making are also affected by our Space/Time Sense. Also shown in Figure 8-1 are some latent functions, which may be tapped in a d-ASC, but are not available in the b-SoC. 

The feedback control arrow from Subconscious to Input-Processing indicates that the Subconscious subsystem may have a major control over perception. Our likes and dislikes, needs and fears, can affect what we see. This kind of selectivity in perception is discussed in relation to the Input-Processing subsystem. I bring it up here to indicate a distinction between relatively permanent, learned selectivities of perception that are inherent in Input-Processing itself, such as ability to recognize words, and selectivities that are more dependent on the current emotional state of the Subconscious subsystem, and so may show more variation from time to time. For example, we have many permanent learnings that are part of... 

Input-Processing and that enable us to distinguish men from women at a glance. But we have sexual needs that peak from time to time, and these may be partially or wholly in the Subconscious subsystem because of cultural repressive pressures. As these repressed needs vary, they affect Input-Processing and change our current perceptions of people of the opposite sex they can become much more attractive when we are aroused. 

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