This is a first go at a simple inventory system. No delays between Orders and Deliveries. Inventory fails to attain the level of Desired Inventory.

Workforce, Inventory and Oscillation model from Vensim user guide.

Workforce and Inventory model

Workforce and Inventory model

This is a first go at a simple inventory system. No delays between Orders and Deliveries. Inventory fails to attain the level of Desired Inventory.

Teaching model

This is a first go at a simple inventory system. No delays between Orders and Deliveries. Inventory fails to attain the level of Desired Inventory.

Workforce and Inventory model

Workforce and Inventory model

From Jay Forrester' Principles of Systems

This model using Random function

This is a first go at a simple inventory system. No delays between Orders and Deliveries. Inventory fails to attain the level of Desired Inventory.

From Jay Forrester' Principles of Systems

This model includes Average Sales in Orders to bring some stability and allows Inventory to attain the level of Desired Inventory.

This is a first go at a simple inventory system. No delays between Orders and Deliveries. Inventory fails to attain the level of Desired Inventory.

Workforce, Inventory and Oscillation model from Vensim user guide.

Workforce and Inventory model

This model assume Sales increase 10% and used to test to response of the number of items on orders

Workforce, Inventory and Oscillation model from Vensim user guide.

Models the behaviour of ​Blood Bank and Hospital blood inventories in response to a step change in the demand for transfusions.  Delays can be set for the delivery of blood to the hospitals and for the response of donors to a request for more blood.

Workforce, Inventory and Oscillation model from Vensim user guide.

This model includes Average Sales in Orders to bring some stability and allows Inventory to attain the level of Desired Inventory.

A demonstration of a simple min/max inventory system