1) Nature and natural things - system and sub systems which should be dealt with which has influence on the problem. Here energy which is originated from nature also taken into consideration. In short all things which is out there naturally, including animals. Humans are not considered as they have reasoning capacity to adjust himself or have a conscious level to know the objectives of the problem.
2) Humans - a reason which should be dealt as a system with while solving the problem. Here human physical condition, mind and soul level adjustments are also considered.Humans have reasoning capacity to adjust himself according to the problem or adjust under instructions or have a conscious level to know the objectives of the problem. Humans are considered here seperately even he is part of the nature as he is the problem solver or a system that act as the soul of the problem.
3) Artificial things. - systems on an artificial level which should be dealt with which is related to the problem. Here ideas and plans are also considered in the sense its artificially created by humans. Money and funds needed are coming under this. Anything that is here on earth that is born out of human intervention is considered here to solve the problem.
This approach seems little more error free compared to other approaches considered earlier.
To be continued