The Statistics table (MP models)

Analyzes the results of the solve process displayed as statistics in the IDE.

The table in the Statistics tab reflects the contents of the Engine Log hierarchically as a tree. The table shown in the following screen capture is displayed at the end of the solve process for scalableWarehouse.mod.

Figure 1. MP models: results for scalableWarehouse.mod
Statistics table for the scalableWarehouse model

The top level of the Statistic tree indicates the solving engine (CPLEX). You see certain statistic values change dynamically as the solving takes place.

For most algorithms, the statistics items are:

  • the CPLEX problem

    • Number of constraints and variables, in a format similar to that of the Engine Log, with various characterizations.

    • Number of nonzero coefficients

    • Number of quadratic constraints and coefficients, when applicable

  • the presolve stage (not shown in the scalableWarehouse example)

    • Number of rows and columns removed, when applicable

  • the solve stage, with the names of the algorithms used, such as MIP, Barrier, Simplex, and so on, with the corresponding statistics for each of them.