Workforce, Inventory and Oscillation model from Vensim user guide.

From Jay Forrester' Principles of Systems

Supply Demand Inventory Modle

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.

From Jay Forrester' Principles of Systems

This model assumes Sales are constant and used to calculate the number of items on orders

It is a Balanced Loop Model of Production. Production is driven by the gap between  Target Inventory and Inventory as well as orders.

This model using Ramp function

A demonstration of a simple min/max inventory system

Este es un modelo simplificado de la gestion de inventario de un articulo.

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

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

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

This model assumes Sales are constant and used to calculate the number of items on orders

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

Workforce and Inventory model

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.

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

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

This model uses Step function