Dynamic analysis and replanning tools can help you plan ahead when you make changes to your project. They help you figure out what impacts the changes you are making will have on the outcome of the project, so you can plan ahead and make smarter decisions. For example, if you are building a house, you may need to figure out the cost of materials, how much time it might take to finish, and how much your budget will be affected. A dynamic analysis and replanning tool can help you work out all of these things so you don't end up overspending or taking too long to finish the job.