The System Operator is one of the main TRIZ instruments and, of course, one of the best instruments for systematization of thinking.
According to the System Operator we have to take into account not only the system itself but also its super-system and subsystems. We have to look at the system in the context of its development. Thus for the system, super-system and subsystem we take into account the present, the past and the future... It is like "switching on" at least 9 screens to view these different time periods for each level. Sometimes this operation is enough to find the solution.
The TRIZ literature analysis shows that we use the System Operator under a variety of different conditions:
Therefore there are different rules for the using the System Operator under these different conditions.
1. The correct problem statement.
We assume the problem in any technological system as an undesirable effect.
Thus (in order to apply the System operator) we consider the undesirable effect (UDE) and the element connected with this UDE as our system.
For example: We cant increase the speed of an aircraft because of the air resistance to the wings. The element connected with this UDE is wing.
a. As subsystem we assume the sub-UDE which appears if the known methods of the original problem (air resistance) are used.
For example: If we will make the area of the wings less - the another UDE will appear --we have to increase the take of speed off our aircraft... And the element connected with this UDE is the airport runway, which will have to be too long...
b. As super system we assume the super-UDE, which appears if we remove the element connected with the original UDE.
For example: We remove the wings. So there isn't air resistance to wings, but we have the new UDE connected with non-performance of the wingsfunction...
c. As the past system we assume the past-UDE which is the reason of our original one.
For example: Maybe the reason for air resistance to wings is the vortex motion of air which is caused by the wing surface... And the element which is connected with this UDE is part of the surface of the wings...
d. As the future system we assume the future-UDE, which will be result if the original UDE was not eliminated.
For example: The loss of time because of the low speed of our aircraft.
It depends on You to choose the problem for solving, based on the resources You have.
a. When we look for the solution for our problem we assume as our system the concrete function carrier.
For example: If we have problem with a mixer we take into account this specific mixer under its specific conditions!!!
b. For time (past system- future system) axis we assume as our system the operation of the technological process. Thus the future and the past systems are the systems for the previous and the next operation.
For example: For our mixer the previous and next operations are as follows:
Previous - Preparing the ingredients
Next- The action with the ready mixture.
Thus we can determine the past and future system accordingly...
c. For the component (super, sub system) axis we assume as our system the construction (structure, thing). So the subsystems are the system's components and our system is the component of the super-system. It is clear enough, but there is a little addition. We have to consider the super and sub systems for:
This makes the problem solving process easier. And the laws of transition into super-system and into micro-level work very well here (mono-bi-poly transitions, anti- or competitive systems, joining etc.)
The easy way to remember how to build the chart is:
Trends of the system development determination.
When we want to determine the basic trend of the system development we assume as our system the abstract function carrier.
For example: We will take into account instead of specific mixer, abstract systems for performing the action "to mix" and their past, future, and so on..
The work under these conditions is described very well in TRIZ books and other TRIZ sources. Read them for more information.