Joe Chan is modeling the installation of smoke alarms.The constraint Y₁ - Y₂ $\ge$ 0 uses the binary variables Y₁ for upstairs installation and Y₂ for downstairs installation.The constraint implies that if the first installation is performed, the second must also be performed.

Question

Quizplus · Accepted Answer

The constraint Y₁ - Y₂ ≥ 0 implies that if the upstairs installation (Y₁) is performed, the downstairs installation (Y₂) must also be performed, not the other way around.

Joe Chan Is Modeling the Installation of Smoke Alarms ≥\ge≥ 0 Uses the Binary Variables Y1 for Upstairs Installation and Y1

Joe Chan Is Modeling the Installation of Smoke Alarms $\ge$ 0 Uses the Binary Variables Y₁ for Upstairs Installation and Y₁