I would not even call it a failure, some things are infeasible, economically non-viable, etc. Try to de-risk projects to see if they fall into those categories

I would not even call it a failure, some things are infeasible, economically non-viable, etc. Try to de-risk projects to see if they fall into those categories. Figure out the major barriers and try to de-risk them one by one. If you run into a real barrier, also don't hesitate to end the project. Sometimes "failure" is the best option.