Question

1. Describe one syste e one system with one stock and two-competing balancing loops. 2. Describe a system with a stock, one reinforcing loop and one balancing loop. 3. Describe a system with two balancing loops and delays.

Answer 1

“Describe one system with one stock and two competing balancing loop”

Ans.

Room temperature: The room temperature is regulated by thermostat and furnace.

Two loops try to drag a single stock to two different goals. Room temperature below thermostat setting will turn the heating on and as temperature rises, the heating will turn off.

“Describe a system with stock and one reinforcing loop and one balancing loop”

Ans:

Population and industrial economy: Population is governed by a reinforcing loop of births and balancing a loop of death.

When one loop dominates another. It has a strong impact on behavior. The system always has many competing feedback loops operating simultaneously. The loops which dominate the system will determine the behavior.

“Describe a system with two balancing loop and delays”

Ans

Inventory of cars:

Inventory at a car dealership with three common delays is perception delay, response delay, and a delivery delay.

Delays are an integral part of the system and determine the behavior. Changing the length of the delay will make a large change in the behavior of the system. The desired state which we assume is fixed during the consideration interacts with current state to create a gap. The gap created by the difference in the desired state and current state is the motivation for action. The greater the gap greater the motivation for action. When action results in desire state being equal to the current state there is no motivation for action. Once the inventory for car matches the demand for cars there is no action required.