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- Type:
- Document
- Date Created:
- 1995
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- b83f2ce2912343b559f967dd985da515, 23d738ba88f8333bc39725f9cb5bd0b8, and 12420ec6bd5f758d2b4dea59aabd75a9
- Description:
- There is an a priori in the system dynamics paradigm which implies that the behavior of a system is tightly related to its structure. A structure specifies the relationship between the elements of the system in term of stocks and flows and feedback loops. The attempt is to explain the behavior of a system based upon the accumulation in a system and its positive and negative feedback loops. This note introduces the concept of implicit loops or pathways, as components of a major loop, to explain how changes in the behavior of a variable of the system occur over time. The note demonstrates that they presence of a negative loop (explicit or implicit) around a positive loop (explicit or implicit) is necessary in order for a system to oscillate. In particular, in explains how a pure positive major loop can oscillate.