Sifting

Type

Selection

Range

The settings listed below

Default

Automatic

This option enables or disables sifting within dual simplex. Sifting is often useful for LP models where the number of variables is many times larger than the number of constraints. Possible values are:

• Automatic

• Off

• Moderate

• Aggressive

With a ‘Moderate’ setting, sifting will be applied to LP models and to the root node for MIP models. With an ‘Aggressive’ setting, sifting will be applied any time dual simplex is used, including at the nodes of a MIP. Note that this option has no effect if you aren’t using dual simplex. Note also that sifting will be skipped in cases where it is obviously a worse choice than dual simplex, even when sifting has been selected.

Learn more about

• Sifting Method