This class models a buffer that is replenish by an external supplier using a reorder-point policy. More...

#include <model.h>

Inheritance diagram for frepple::BufferProcure:

List of all members.

Public Member Functions

 BufferProcure (const string &c)
virtual void endElement (XMLInput &, const Attribute &, const DataElement &)
virtual PyObject * getattro (const Attribute &)
TimePeriod getFence () const
TimePeriod getLeadtime () const
TimePeriod getMaximumInterval () const
double getMaximumInventory () const
TimePeriod getMinimumInterval () const
double getMinimumInventory () const
OperationgetOperation () const
virtual size_t getSize () const
double getSizeMaximum () const
double getSizeMinimum () const
double getSizeMultiple () const
virtual const MetaClassgetType () const
virtual int setattro (const Attribute &, const PythonObject &)
void setFence (TimePeriod p)
void setLeadtime (TimePeriod p)
void setMaximumInterval (TimePeriod p)
void setMaximumInventory (double f)
void setMinimumInterval (TimePeriod p)
void setMinimumInventory (double f)
void setSizeMaximum (double f)
void setSizeMinimum (double f)
void setSizeMultiple (double f)
virtual void solve (Solver &s, void *v=NULL) const
virtual void writeElement (XMLOutput *, const Keyword &, mode=DEFAULT) const

Static Public Member Functions

static int initialize ()

Static Public Attributes

static const MetaClassmetadata

Detailed Description

This class models a buffer that is replenish by an external supplier using a reorder-point policy.

It represents a material buffer where a replenishment is triggered whenever the inventory drops below the minimum level. The buffer is then replenished to the maximum inventory level.
A leadtime is taken into account for the replenishments.
The following parameters control this replenishment:

  • MinimumInventory:
    Inventory level triggering a new replenishment.
    The actual inventory can drop below this value.
  • MaximumInventory:
    Inventory level to which we try to replenish.
    The actual inventory can exceed this value.
  • Leadtime:
    Time taken between placing the purchase order with the supplier and the delivery of the material.

Using the additional parameters described below the replenishments can be controlled in more detail. The resulting inventory profile can end up to be completely different from the classical saw-tooth pattern!

The timing of the replenishments can be constrained by the following parameters:

  • MinimumInterval:
    Minimum time between replenishments.
    The order quantity will be increased such that it covers at least the demand in the minimum interval period. The actual inventory can exceed the target set by the MinimumInventory parameter.
  • MaximumInterval:
    Maximum time between replenishments.
    The order quantity will replenish to an inventory value less than the maximum when this maximum interval is reached. When the minimum and maximum interval are equal we basically define a fixed schedule replenishment policy.

The quantity of the replenishments can be constrained by the following parameters:

  • MinimumQuantity:
    Minimum quantity for a replenishment.
    This parameter can cause the actual inventory to exceed the target set by the MinimumInventory parameter.
  • MaximumQuantity:
    Maximum quantity for a replenishment.
    This parameter can cause the maximum inventory target never to be reached.
  • MultipleQuantity:
    All replenishments are rounded up to a multiple of this value. When the minimum and maximum quantity are equal we basically define a fixed quantity replenishment policy.

Definition at line 2983 of file model.h.


Constructor & Destructor Documentation

frepple::BufferProcure::BufferProcure ( const string &  c) [inline, explicit]

Constructor.

Definition at line 2997 of file model.h.


Member Function Documentation

void frepple::BufferProcure::endElement ( XMLInput pIn,
const Attribute pAttr,
const DataElement pElement 
) [virtual]

Reimplemented from frepple::Buffer.

Definition at line 703 of file buffer.cpp.

PyObject * frepple::BufferProcure::getattro ( const Attribute attr) [virtual]

Default getattro method.
Subclasses are expected to implement an override if the type supports gettattro.

Reimplemented from frepple::Buffer.

Definition at line 914 of file buffer.cpp.

TimePeriod frepple::BufferProcure::getFence ( ) const [inline]

Return the release time fence.

Definition at line 3014 of file model.h.

TimePeriod frepple::BufferProcure::getLeadtime ( ) const [inline]

Return the purchasing leadtime.

Definition at line 3003 of file model.h.

TimePeriod frepple::BufferProcure::getMaximumInterval ( ) const [inline]

Return the maximum time interval between sytem-generated replenishment operations.

Definition at line 3094 of file model.h.

double frepple::BufferProcure::getMaximumInventory ( ) const [inline]

Return the maximum inventory level to which we wish to replenish.

Definition at line 3050 of file model.h.

TimePeriod frepple::BufferProcure::getMinimumInterval ( ) const [inline]

Return the minimum interval between purchasing operations.
This parameter doesn't control the timing of the first purchasing operation, but only to the subsequent ones.

Definition at line 3079 of file model.h.

double frepple::BufferProcure::getMinimumInventory ( ) const [inline]

Return the inventory level that will trigger creation of a purchasing.

Definition at line 3022 of file model.h.

Operation * frepple::BufferProcure::getOperation ( ) const

Returns the operation that is automatically created to represent the procurements.

Definition at line 758 of file buffer.cpp.

virtual size_t frepple::BufferProcure::getSize ( ) const [inline, virtual]

Return the memory size of the object in bytes.

Implements frepple::utils::Object.

Definition at line 2990 of file model.h.

double frepple::BufferProcure::getSizeMaximum ( ) const [inline]

Return the maximum quantity of a purchasing operation.

Definition at line 3120 of file model.h.

double frepple::BufferProcure::getSizeMinimum ( ) const [inline]

Return the minimum quantity of a purchasing operation.

Definition at line 3107 of file model.h.

double frepple::BufferProcure::getSizeMultiple ( ) const [inline]

Return the multiple quantity of a purchasing operation.

Definition at line 3133 of file model.h.

virtual const MetaClass& frepple::BufferProcure::getType ( ) const [inline, virtual]

This returns the type information on the object, a bit similar to the standard type_info information.

Reimplemented from frepple::Buffer.

Definition at line 2989 of file model.h.

int frepple::BufferProcure::initialize ( ) [static]

Initialize the class.

Reimplemented from frepple::Buffer.

Definition at line 85 of file buffer.cpp.

int frepple::BufferProcure::setattro ( const Attribute attr,
const PythonObject field 
) [virtual]

Default setattro method.
Subclasses are expected to implement an override if the type supports settattro.

Reimplemented from frepple::Buffer.

Definition at line 938 of file buffer.cpp.

void frepple::BufferProcure::setFence ( TimePeriod  p) [inline]

Update the release time fence.

Definition at line 3017 of file model.h.

void frepple::BufferProcure::setLeadtime ( TimePeriod  p) [inline]

Update the procurement leadtime.

Definition at line 3006 of file model.h.

void frepple::BufferProcure::setMaximumInterval ( TimePeriod  p) [inline]

Update the minimum time between replenishments.

Definition at line 3097 of file model.h.

void frepple::BufferProcure::setMaximumInventory ( double  f) [inline]

Update the maximum inventory level to which we plan to replenish.
This is not a hard limit - other parameters can make that the actual inventory either never reaches this value or always exceeds it.

Definition at line 3057 of file model.h.

void frepple::BufferProcure::setMinimumInterval ( TimePeriod  p) [inline]

Update the minimum time between replenishments.

Definition at line 3082 of file model.h.

void frepple::BufferProcure::setMinimumInventory ( double  f) [inline]

Update the inventory level that will trigger the creation of a replenishment.
Because of the replenishment leadtime, the actual inventory will drop below this value. It is up to the user to set an appropriate minimum value.

Definition at line 3031 of file model.h.

void frepple::BufferProcure::setSizeMaximum ( double  f) [inline]

Update the maximum replenishment quantity.

Definition at line 3123 of file model.h.

void frepple::BufferProcure::setSizeMinimum ( double  f) [inline]

Update the minimum replenishment quantity.

Definition at line 3110 of file model.h.

void frepple::BufferProcure::setSizeMultiple ( double  f) [inline]

Update the multiple quantity.

Definition at line 3136 of file model.h.

virtual void frepple::BufferProcure::solve ( Solver s,
void *  v = NULL 
) const [inline, virtual]

This method is called by solver classes. The implementation of this class simply calls the solve method on the solver class. Using the polymorphism the solver can implement seperate methods for different plannable subclasses.

Reimplemented from frepple::Buffer.

Definition at line 2986 of file model.h.

void frepple::BufferProcure::writeElement ( XMLOutput o,
const Keyword tag,
mode  m = DEFAULT 
) const [virtual]

Reimplemented from frepple::Buffer.

Definition at line 728 of file buffer.cpp.


Member Data Documentation

Reimplemented from frepple::Buffer.

Definition at line 3000 of file model.h.


The documentation for this class was generated from the following files:

Documentation generated for frePPLe by  doxygen