In Agile, we manage project contingencies using the functional scope as an adjustment variable. When your project consists of building a model (as a subset of a larger solution), it has one unique feature which makes it incompatible with Agile frameworks.
Learn about the Burden of Disease methods and improve your decision making.
Project management is all about managing project drift. Of course, you need to predict and prevent deviation - or drift -, but when it crops up, you need to handle it properly. There
Acknowledging the threat is not enough. You should implement a new culture and new way of working at almost every level of your organization.