modelBrokenTransition

The inflow to B is proportional to the outflow from A
Diagram of BrokenTransitionOpen the diagram
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Extends from Interfaces.Basics.GenericFlow (Flow Template with two FlowPorts), Interfaces.Basics.Interaction4SO (Output connectors for interaction elements reporting rates), Icons.Interaction (Icon for interactional flow classes).

Information

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This is the classical structure for a broken flow from stock A to stock B, where the rate of outflow is given for stock A. A's outflow will flow into a →Cloud and accordingly, there will be an inflow to stock B which is given by:

rate of inflow to B = rate of outflow from A × factor of proportionality

Here the factor of proportionality will be given in units base units of B per base units of A, so that the resulting inflow to B will have proper units [base units for a flow of B].

Implementation


Diagram for BrokenTransition
Diagram.png

Notes

  • Jim Hines [6, p. 16] notes, that "in an aggregated model of a supply chain there will be a change of units and a conceptual break in the transition from raw materials inventory to work in progress."

  • The choice of OutputType_A will set the type for parameter rate.

  • Great care has to be taken entering the factor as it needs to be given in base units of stock B per base units of stock A. If the unit attribute is left an empty string (default), then fitting units will automatically be deduced effectively short-circuiting unit checks.

  • To more robustly specify conversion factors, upon useExplicitRatio = true a constant ratio outputB per inputA can alternatively be given, where outputB and inputA will have units according to OutputType_B and OutputType_A, respectively.

See also

BrokenTransitionPull, Transition

Parameters

TypeNameDefaultDescription
OutputType_ArateunspecifiedConstant rate of outflow for the stock A
Realfactor1Constant factor of proportionality to be multiplied with the outflow from A [base units B/base units A]
OutputType_BoutputB1Constant output of B to specify the conversion factor as the ratio outputB : inputA
OutputType_AinputA1Constant input of A to specify the conversion factor as the ratio outputB : inputA
Structural Parameters
BooleanhasConstantFactorfalse= true, if the factor is to be given by the constant parameter
BooleanhasConstantRatefalse= true, if the outflow rate for A is to be given by the constant parameter
BooleanuseExplicitRatiofalse= true, if instead of a constant factor a constant ratio of output per input is to be entered

Connectors

TypeNameDefaultDescription
Connectors.FlowPortportA (from GenericFlow)Flow from/to Stock A
Connectors.FlowPortportB (from GenericFlow)Flow to/from Stock B
RealOutput_By_B (from Interaction4SO)Rate for flow to and from B (positive value indicates inflow)
RealOutput_By1_B (from Interaction4SO)Rate for flow to and from B (positive value indicates inflow)
RealOutput_Ay1_A (from Interaction4SO)Rate for flow to and from A (positive value indicates inflow)
RealOutput_Ay_A (from Interaction4SO)Rate for flow to and from A (positive value indicates inflow)
Interfaces.Connectors.RealInputu_rateRate of outflow from A
Interfaces.Connectors.RealInputu_factorFactor of proportionality (units B / units A)

Revisions

  • Value for the optional parameter rate changed to unspecified in v2.1.0.

  • Component type for parOutflowRate changed to ConstantConverter and type for factor changed to Real in v2.2.

  • Added useExplicitRatio option for more convenience in unit conversions in v2.2.