WOLFRAM SYSTEM MODELER
InventoryForresterStepInventory simulation with sinusoidal orders |
|
SystemModel["SystemDynamics.IndustrialDynamics.Inventory.InventoryForresterStep"]

The fourth simulation involves a step in the incoming orders:
RRR(t) = RRRini + if time > 10 then RRRoffset else 0;
Simulate the model across 90 weeks, and plot on one graph the incoming orders and the production flow in the factory and on a second graph the levels of goods in retail, distribution, and the factory as functions of time:
| RRRiniTop |
Value: 1000 Type: Real (1/wk) Description: Inital value of customer requests at retail |
|---|---|
| RRDiniTop |
Value: RRRiniTop Type: Real (1/wk) Description: Inital value of requisitions received at distribution |
| RRFiniTop |
Value: RRRiniTop Type: Real (1/wk) Description: Inital value of requisitions received at factory |
| orders |
Type: Real (1/wk) Description: Sinusoidal orders |
|---|---|
| factoryFlow |
Type: Real (1/wk) Description: Manufacturing flow at factory |
| retailStock |
Type: Real Description: Stock of goods in retail |
| distributionStock |
Type: Real Description: Stock of goods in distribution |
| factoryStock |
Type: Real Description: Stock of goods in factory |
| Factory1 |
Type: Factory Description: Factory model |
|
|---|---|---|
| Distribution1 |
Type: Distribution Description: Distribution model |
|
| Retail1 |
Type: Retail Description: Retail model |
|
| Orders |
Type: Step Description: Generate step signal of type Real |