Initializing help system before first use

# PREROOTEFFORT

Description | Dial for the work spent during the Pre-root parallel heuristic phase. A positive value sets a suitable work limit that is dependent on problem-characteristics. Changing the value up/or down dials the work spent in this phase up or down. This control also enables/disables Pre-root parallel heuristics.
Type | Double
Topic areas | Parallel, Heuristics, Limits
Values |
-2 | Enable Pre-root parallel heuristics without a specific work limit for this phase. The phase will terminate if a different limit is hit, or if it runs out of heuristic work to do.
-1 | Enablement of Pre-root parallel heuristics is subject to HEUREMPHASIS.
0 | Disable Pre-root parallel heuristics.
>0 | Enable Pre-root parallel heuristics with a work limit dependent on problem characteristics, using the control value as a factor to dial this work limit up or down.
Default value | -1
Notes | The special value of -2 does not use a phase-specific work limit at all. Make sure to use other limits to stop the Pre-root parallel phase eventually. If a WORKLIMIT on the overall solution process has been set, it also applies during the pre-root parallel phase. This control always sets a work limit that depends on the characteristics of the presolved problem. If you prefer to set an absolute work limit instead, consider the control PREROOTWORKLIMIT.
Affects routines | XPRSoptimize ( OPTIMIZE)
See also | PREROOTWORKLIMIT, HEUREMPHASIS
Category | Control

Parent Topic Control Parameters

© 2001-2026 Fair Isaac Corporation. All rights reserved. This documentation is the property of Fair Isaac Corporation (“FICO”). Receipt or possession of this documentation does not convey rights to disclose, reproduce, make derivative works, use, or allow others to use it except solely for internal evaluation purposes to determine whether to purchase a license to the software described in this documentation, or as otherwise set forth in a written software license agreement between you and FICO (or a FICO affiliate). Use of this documentation and the software described in it must conform strictly to the foregoing permitted uses, and no other use is permitted.