Although software project risk management has been found to positively affect project success, research suggests that software project risk management is not widely practiced. Addressing this issue, this research-in-progress paper focuses on the risk-response step of risk management and proposes a model that explains and predicts software project managers’ undertaking of risk-response actions. The theoretical model integrates behavioral decision making under uncertainty literature and the reasoned action approach. Especially, the availability heuristic (i.e., people’s reliance on the accessible information to make judgments) is used to explain the variation in the project managers’ beliefs about the outcomes of continuing-risk-inaction and undertaking risk-response actions. The paper presents the survey methodology that will be adopted to test the model.