Activity Constraint
ConceptAn activity constraint is a component of a Conditional Constraint Satisfaction Problem (CondCSP) that dictates when a variable becomes active or inactive, based on whether an associated compatibility-style condition holds.
First seen 8/12/2026
Last seen 8/12/2026
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Activity Constraint
Definition
An activity constraint is a constraint used within a Conditional Constraint Satisfaction Problem (CondCSP) to control whether variables are considered active (and thus receive value assignments) or inactive within a given problem instance.
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2 connectionsCondCSP Solver processes activity constraints as part of CondCSP solving.
CondCSP uses activity constraints to specify when variables become active.
CITATIONS
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[1] An activity constraint in a CondCSP has the form c_act → v (requiring v to be active when c holds) or c_rn → v (requiring v to be inactive when c holds). Automatic test program generation using extended conditional constraint satisfaction - Intranational Business Machines Corporation
[2] A CondCSP solution consists of a set of active variables (which must include all initial variables) and a value assignment to the active variables satisfying all active compatibility constraints and all activity constraints. Automatic test program generation using extended conditional constraint satisfaction - Intranational Business Machines Corporation
[3] When an ECondCSP is translated to a CondCSP, two activity constraints are added for each variable to enforce that the original variable and its shadow are mutually exclusive (one active iff the other inactive). Automatic test program generation using extended conditional constraint satisfaction - Intranational Business Machines Corporation
[4] The activity constraints of the original ECondCSP are duplicated unchanged into the composed CondCSP during the transformation. Automatic test program generation using extended conditional constraint satisfaction - Intranational Business Machines Corporation
[5] Example activity constraints generated during ECondCSP-to-CondCSP translation for variables a and b include ā_rn → a, a_rn → ā, b̄_rn → b, and b_rn → b̄. Automatic test program generation using extended conditional constraint satisfaction - Intranational Business Machines Corporation