Constructor Detail

• Environment

  Environment(String name)

• Environment

  Environment(String name, int numStages)

Method Detail

• addStage

   void addStage(int stageIdx, String name, String type, Network model)

  Adds a network model to a specific stage of the environment. All stages must have networks with the same number of stateful nodes.

  Parameters:

  stageIdx - the index of the stage (0-based)

  name - the name of this stage

  type - the type classification for this stage

  model - the network model to associate with this stage

• addTransition

   void addTransition(int fromStageIdx, int toStageIdx, Markovian distrib)

  Adds a transition between two stages with default reset function (identity).

  Parameters:

  fromStageIdx - the source stage index

  toStageIdx - the destination stage index

  distrib - the Markovian distribution governing this transition

• addTransition

   void addTransition(int fromStageIdx, int toStageIdx, Markovian distrib, Environment.ResetQueueLengthsFunction resetFun)

  Adds a transition between two stages with a custom reset function.

  Parameters:

  fromStageIdx - the source stage index

  toStageIdx - the destination stage index

  distrib - the Markovian distribution governing this transition

  resetFun - function to apply when transitioning to reset queue lengths

• addTransition

   void addTransition(int fromStageIdx, int toStageIdx, Markovian distrib, Environment.ResetQueueLengthsFunction resetFun, Environment.ResetEnvRatesFunction resetEnvRatesFun)

  Adds a transition between two stages with custom reset functions for both queue lengths and environment rates.

  Parameters:

  fromStageIdx - the source stage index

  toStageIdx - the destination stage index

  distrib - the Markovian distribution governing this transition

  resetFun - function to apply when transitioning to reset queue lengths

  resetEnvRatesFun - function to apply when transitioning to reset environment rates

• init

   void init()

• printStageTable

   void printStageTable()

  Prints a formatted table showing all stages, their properties, and transitions. Displays stage names, types, associated networks, and transition rates.

• findStageByName

   int findStageByName(String stageName)

  Finds the stage index by name.

  Parameters:

  stageName - the name of the stage to find

  Returns:

  the index of the stage, or -1 if not found

• getStageName

   String getStageName(int stageIdx)

  Gets the name of the stage at the given index.

  Parameters:

  stageIdx - the index of the stage (0-based)

  Returns:

  the name of the stage

• getNumberOfStages

   int getNumberOfStages()

  Gets the number of stages in this environment.

  Returns:

  the number of stages

• addNodeBreakdown

   void addNodeBreakdown(Network baseModel, String nodeName, Markovian breakdownDist, Markovian downServiceDist)

  Adds a breakdown stage for a specific node in the network. This creates an UP stage (if not already present) and a DOWN stage where the specified node has a reduced service rate. A transition from UP to DOWN is added with the given breakdown distribution.

  Parameters:

  baseModel - the base network model with normal (UP) service rates

  nodeName - the name of the node that can break down

  breakdownDist - the distribution for time until breakdown (UP->DOWN transition)

  downServiceDist - the service distribution when the node is down

• addNodeBreakdown

   void addNodeBreakdown(Network baseModel, Node node, Markovian breakdownDist, Markovian downServiceDist)

  Adds a breakdown stage for a specific node in the network. Overload that accepts a Node object instead of a node name.

  Parameters:

  baseModel - the base network model with normal (UP) service rates

  node - the node that can break down

  breakdownDist - the distribution for time until breakdown (UP->DOWN transition)

  downServiceDist - the service distribution when the node is down

• addNodeBreakdown

   void addNodeBreakdown(Network baseModel, String nodeName, Markovian breakdownDist, Markovian downServiceDist, Environment.ResetQueueLengthsFunction resetFun)

  Adds a breakdown stage for a specific node with a custom reset policy.

  Parameters:

  baseModel - the base network model with normal (UP) service rates

  nodeName - the name of the node that can break down

  breakdownDist - the distribution for time until breakdown

  downServiceDist - the service distribution when the node is down

  resetFun - function to reset queue lengths on breakdown

• addNodeBreakdown

   void addNodeBreakdown(Network baseModel, Node node, Markovian breakdownDist, Markovian downServiceDist, Environment.ResetQueueLengthsFunction resetFun)

  Adds a breakdown stage for a specific node with a custom reset policy. Overload that accepts a Node object instead of a node name.

  Parameters:

  baseModel - the base network model with normal (UP) service rates

  node - the node that can break down

  breakdownDist - the distribution for time until breakdown

  downServiceDist - the service distribution when the node is down

  resetFun - function to reset queue lengths on breakdown

• addNodeRepair

   void addNodeRepair(String nodeName, Markovian repairDist)

  Adds a repair transition from DOWN to UP stage for a previously added breakdown.

  Parameters:

  nodeName - the name of the node that can be repaired

  repairDist - the distribution for repair time (DOWN->UP transition)

• addNodeRepair

   void addNodeRepair(Node node, Markovian repairDist)

  Adds a repair transition from DOWN to UP stage for a previously added breakdown. Overload that accepts a Node object instead of a node name.

  Parameters:

  node - the node that can be repaired

  repairDist - the distribution for repair time (DOWN->UP transition)

• addNodeRepair

   void addNodeRepair(String nodeName, Markovian repairDist, Environment.ResetQueueLengthsFunction resetFun)

  Adds a repair transition with a custom reset policy.

  Parameters:

  nodeName - the name of the node that can be repaired

  repairDist - the distribution for repair time

  resetFun - function to reset queue lengths on repair

• addNodeRepair

   void addNodeRepair(Node node, Markovian repairDist, Environment.ResetQueueLengthsFunction resetFun)

  Adds a repair transition with a custom reset policy. Overload that accepts a Node object instead of a node name.

  Parameters:

  node - the node that can be repaired

  repairDist - the distribution for repair time

  resetFun - function to reset queue lengths on repair

• addNodeFailureRepair

   void addNodeFailureRepair(Network baseModel, String nodeName, Markovian breakdownDist, Markovian repairDist, Markovian downServiceDist)

  Convenience method to add both breakdown and repair for a node. This is the most common use case where a node can fail and be repaired.

  Parameters:

  baseModel - the base network model with normal (UP) service rates

  nodeName - the name of the node that can break down and repair

  breakdownDist - the distribution for time until breakdown

  repairDist - the distribution for repair time

  downServiceDist - the service distribution when the node is down

• addNodeFailureRepair

   void addNodeFailureRepair(Network baseModel, Node node, Markovian breakdownDist, Markovian repairDist, Markovian downServiceDist)

  Convenience method to add both breakdown and repair for a node. Overload that accepts a Node object instead of a node name.

  Parameters:

  baseModel - the base network model with normal (UP) service rates

  node - the node that can break down and repair

  breakdownDist - the distribution for time until breakdown

  repairDist - the distribution for repair time

  downServiceDist - the service distribution when the node is down

• addNodeFailureRepair

   void addNodeFailureRepair(Network baseModel, String nodeName, Markovian breakdownDist, Markovian repairDist, Markovian downServiceDist, Environment.ResetQueueLengthsFunction resetBreakdown, Environment.ResetQueueLengthsFunction resetRepair)

  Adds both breakdown and repair for a node with custom reset policies.

  Parameters:

  baseModel - the base network model with normal (UP) service rates

  nodeName - the name of the node that can break down and repair

  breakdownDist - the distribution for time until breakdown

  repairDist - the distribution for repair time

  downServiceDist - the service distribution when the node is down

  resetBreakdown - reset function for breakdown transition

  resetRepair - reset function for repair transition

• addNodeFailureRepair

   void addNodeFailureRepair(Network baseModel, Node node, Markovian breakdownDist, Markovian repairDist, Markovian downServiceDist, Environment.ResetQueueLengthsFunction resetBreakdown, Environment.ResetQueueLengthsFunction resetRepair)

  Adds both breakdown and repair for a node with custom reset policies. Overload that accepts a Node object instead of a node name.

  Parameters:

  baseModel - the base network model with normal (UP) service rates

  node - the node that can break down and repair

  breakdownDist - the distribution for time until breakdown

  repairDist - the distribution for repair time

  downServiceDist - the service distribution when the node is down

  resetBreakdown - reset function for breakdown transition

  resetRepair - reset function for repair transition

• setBreakdownResetPolicy

   void setBreakdownResetPolicy(String nodeName, Environment.ResetQueueLengthsFunction resetFun)

  Sets the reset policy for queue lengths when a node breaks down.

  Parameters:

  nodeName - the name of the node

  resetFun - function to reset queue lengths: resetFun(q) -> q_new Common policies: - input -> input (keep all jobs, default) - input -> input.

• setBreakdownResetPolicy

   void setBreakdownResetPolicy(Node node, Environment.ResetQueueLengthsFunction resetFun)

  Sets the reset policy for queue lengths when a node breaks down. Overload that accepts a Node object instead of a node name.

  Parameters:

  node - the node

  resetFun - function to reset queue lengths: resetFun(q) -> q_new

• setRepairResetPolicy

   void setRepairResetPolicy(String nodeName, Environment.ResetQueueLengthsFunction resetFun)

  Sets the reset policy for queue lengths when a node is repaired.

  Parameters:

  nodeName - the name of the node

  resetFun - function to reset queue lengths: resetFun(q) -> q_new

• setRepairResetPolicy

   void setRepairResetPolicy(Node node, Environment.ResetQueueLengthsFunction resetFun)

  Sets the reset policy for queue lengths when a node is repaired. Overload that accepts a Node object instead of a node name.

  Parameters:

  node - the node

  resetFun - function to reset queue lengths: resetFun(q) -> q_new

• getReliabilityTable

   Map<String, Double> getReliabilityTable()

  Computes system-wide reliability metrics (MTTF, MTTR, MTBF, Availability). This method analyzes the breakdown/repair transitions configured using addNodeBreakdown() and addNodeRepair() to compute reliability metrics.

  Returns:

  a Map containing reliability metrics with keys: "MTTF" - Mean Time To Failure (time from UP to DOWN) "MTTR" - Mean Time To Repair (time from DOWN to UP) "MTBF" - Mean Time Between Failures (MTTF + MTTR) "Availability" - Steady-state probability of being in UP state

• relT

   Map<String, Double> relT()

  Short alias for getReliabilityTable.

  Returns:

  a Map containing reliability metrics (MTTF, MTTR, MTBF, Availability)

• getRelT

   Map<String, Double> getRelT()

  Short alias for getReliabilityTable.

  Returns:

  a Map containing reliability metrics (MTTF, MTTR, MTBF, Availability)

• relTable

   Map<String, Double> relTable()

  Short alias for getReliabilityTable.

  Returns:

  a Map containing reliability metrics (MTTF, MTTR, MTBF, Availability)

• getRelTable

   Map<String, Double> getRelTable()

  Short alias for getReliabilityTable.

  Returns:

  a Map containing reliability metrics (MTTF, MTTR, MTBF, Availability)