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Type Alias: ObjectiveEntry

ObjectiveEntry = { objective: ObjectiveValue; solveTime: number; valid?: true; }

Single entry in the objective value history.

Remarks​

Tracks when each improving solution was found during the solve, along with its objective value and validation status.

There is one entry for each solution found. The entries are ordered by solve time.

See​

SolveResult.objectiveHistory for accessing the history.

Properties​

objective​

objective: ObjectiveValue

The objective value of this solution.

Returns​

The objective value, or None if not applicable.

Remarks​

The value is None when:

  • No objective was specified in the model (no Model.minimize or Model.maximize call).
  • The objective expression has an absent value in this solution.

solveTime​

solveTime: number

Duration of the solve when this solution was found, in seconds.

Returns​

Seconds elapsed.

valid?​

optional valid?: true

Whether this solution was verified (if verification is enabled).

Returns​

True if verified, None if not verified.

Remarks​

When parameter Parameters.verifySolutions is set to True (the default), the solver verifies all solutions found. The verification checks that all constraints in the model are satisfied and that the objective value is computed correctly.

The verification is done using separate code (not used during the search). The point is to independently verify the correctness of the solution.

Possible values are:

  • None - the solution was not verified (because the parameter Parameters.verifySolutions was not set).
  • True - the solution was verified and correct.

The value can never be False because, in this case, the solver would stop with an error.